Undescribed Dinosaurs and Other Prehistoric Life: The Revival

[GojiraGuy1954]

There's a giant eocene frog that's been left unnamed

[Logo7]

A few more updates to be made to this list:
- The specimen from Warwickshire that Stephan Pickering and Samuel Welles wanted to name "Liassaurus" is confirmed by Ezcurra et al. (2021) as being conspecific with Sarcosaurus woodi, an identification first made by Friedrich von Huene in his 1932 monograph on saurischians.
- Lively (2019) confirms that the informally named taxon "Clidastes moorevillensis" is not congeneric with Clidastes propython and designates Clidastes liodontus.
- The "new extremely well preserved specimen of Saurornitholestes" has been described in detail by Currie and Evans (2020).
- "Airakoraptor" has been officially named Kuru kulla by Napoli et al. (2021), who confirm that the bibliographic entry "Morphology Dromaeosaurian dinosaur-Airakoraptor from the upper cretaceous of Mongolia" listed in the bibliography for the paper describing Achillobator was a typographical mistake for the SVP 1992 abstract titled "New dromaeosaur material from the Late Cretaceous of Mongolia" and that the holotype of Kuru is the specimen that Mark Norell and Altangerel Perle wanted to name "Airakoraptor".
- "Ichabodcraniosaurus" has been officially named Shri devi by Turner et al. (2021).
- According to Mickey Mortimer, "Madsenius" was most probably intended by Bob Bakker for the Allosaurus fragilis specimen DINO 2560, while the material informally dubbed "Wyomingraptor" by Bakker (1997) is probably a chimera of more than one taxon.
- The large non-pterodactyloid from the Late Triassic of Utah mentioned in the abstract book for the Flugsaurier 2015 meeting has been named Caelestiventus .
- The "short-snouted archosauriforme (possible crocodyliforme) from the late Triassic of Arizona" mentioned in the SVP 2016 meeting is now officially named Syntomiprosopus (Heckert et al. 2021).
- "Amphicoelicauda" is a nomen nudum for Huabeisaurus
- The caenagnathid specimen from the Horseshoe Canyon Formation reported at the SVP 2015 meeting is now named Apatoraptor.
- The "new macronarian sauropod from Portugal (SVP 2016, pg 190)" is now named Oceanotitan, while the "possible new basal allosauroid from Jurassic Portugal, known from a partial skeleton (SVP 2016, pg 181)" is now named Lusovenator.
- The informal dinosaur names mentioned in Maier (2003) are nomina nuda for what would be described as Dicraeosaurus, Giraffatitan, Janenschia, and Tornieria, as noted in a list of dinosaur genera.

Bakker, R., 1997. Raptor family values: Allosaur parents brought great carcasses into their lair to feed their young. pp. 51-63. In: Wolberg, Sump and Rosenberg (eds). Dinofest International, Proceedings of a Symposium, Academy of Natural Sciences.

Currie PJ, and Evans DC, 2020. Cranial Anatomy of New Specimens of Saurornitholestes langstoni (Dinosauria, Theropoda, Dromaeosauridae) from the Dinosaur Park Formation (Campanian) of Alberta. Anat Rec (Hoboken). 303(4):691-715. doi: 10.1002/ar.24241.

Ezcurra, M. D.; Butler, R. J.; Maidment, S. C. R.; Sansom, I. J.; Meade, L. E.; Radley, J. D. (2021). A revision of the early neotheropod genus Sarcosaurus from the Early Jurassic (Hettangian–Sinemurian) of central England. Zoological Journal of the Linnean Society 191 (1): 113-149. doi:10.1093/zoolinnean/zlaa054.

Heckert, A. B.; Nesbitt, S. J.; Stocker, M. R.; Schneider, V. P.; Hoffman, D. K.; Zimmer, B. W., 2021. A new short-faced archosauriform from the Upper Triassic Placerias/Downs' quarry complex, Arizona, USA, expands the morphological diversity of the Triassic archosauriform radiation. The Science of Nature. 108 (4): Article 32. doi:10.1007/s00114-021-01733-1.

Lively, J.R., 2019. Taxonomy and historical inertia: Clidastes (Squamata: Mosasauridae) as a case study of problematic paleobiological taxonomy. Alcheringa: An Australasian Journal of Palaeontology 42 4:516-527. doi:10.1080/03115518.2018.1549685.

Napoli, J. G.; Ruebenstahl, A. A.; Bhullar, B.-A. S.; Turner, A. H.; Norell, M. A., 2021. A New Dromaeosaurid (Dinosauria: Coelurosauria) from Khulsan, Central Mongolia. American Museum Novitates 3982: 1–47. doi:10.1206/3982.1. hdl:2246/7286. ISSN 0003-0082.

Turner, A.H., Montanari, S., Norell, M.A., 2021. A New Dromaeosaurid from the Late Cretaceous Khulsan Locality of Mongolia. American Museum Novitates 3965: 1–48. doi:10.1206/3965.1. ISSN 0003-0082. S2CID 231597229.

Thank you so much for these updates. Many of these are left-overs from the original list that I just couldn't identify with enough specificity to remove, so I'm glad to know that some of them have finally been described. I've moved those that were legitimately undescribed rather than just being nomina nuda applied to previously described specimens to the published list. Please let me know if you find anything else on this list that needs to be removed.

[Logo7]

There's a giant eocene frog that's been left unnamed

Do you have a paper source for this? If so, I can add it to the list.

[VD231991]

This is a revival post of the thread "Undescribed Dinosaurs and Other Beasts" by ZoPteryx. I noticed that this post hadn't been getting updated for a while, so I made this new post to make those updates. This is a combination of the remaining unpublished studies from the original list and some other unpublished studies that I've found myself. If anyone finds any other unpublished studies that aren't on this list, please leave a comment on this form and I will add it to this list. If anything on this list gets published, please leave a comment on this form and I will remove it from this list. If me reviving this post is not okay for me to do, I will take this post down, but I just wanted to see it get updated more regularly. Anyway, on to the list.

Theropods:
- expanded anteorbital fenestra in theropods may have been an adaptation to improve thermoregulation (SVP 2016, pg 101)
- herbivorous theropod diversity was not linked to changes in plant life or decline of other herbivores (SVP 2016, pg 114)
- possible new material of Saurophaganax from New Mexico that may clear up the status of the genus ()
- a new theropod from the Zorzino Limestone in Italy ()
- New "surprising" theropod species being described by Darren Naish et al (Mentioned on Naish's Twitter account: https://twitter.com/TetZoo/status/1114504504584626176)
- a possible new species of possible carnosaur from the Early Cretaceous Yixian Formation of China (Mentioned in this paper: Zhao, Q.; Xu, X. (2008). "A new Theropod from the Early Cretaceous Yixian Formation of Western Liaoning, China". Journal of Vertebrate Paleontology. 28 (3): 164A. doi:10.1080/02724634.2008.10010459.)
- a new species of coelurosaurid originally described as a specimen of Sinosauropteryx from the Early Cretaceous Yixan Formation of China (Mentioned in this paper: https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1755-6724.2007.tb00942.x)
- "Katsuyamasaurus" theropod from the Early Cretaceous Kitadani Formation of Japan (Mentioned in: Mortimer, M. (2018). "Neotheropoda". TheropodDatabase. Retrieved 2018-07-18)
- "Suciasaurus" theropod from Sucia Island State Park in Washington (First dinosaur from Washington, potential state dinosaur of Washington) (https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0127792)
- "Mifunesaurus" theropod from the Cretaceous of Japan (Mentioned in: Lambert, D., and the Diagram Group. (1990). The Dinosaur Data Book . Facts on File: Oxford, England, 320 p.)
- Possible coelurosaur "Beelemodon" from the Late Jurassic of Colorado (Mentioned in: Bakker, R. Raptor family values: Allosaur parents brought great carcasses into their lair to feed their young. In "Dinofest International", Proceedings of a Symposium, Academy of Natural Sciences, eds Wolberg, Sump and Rosenberg, 51 - 63 (1997).)
- "Kagasaurus" theropod from the Early Cretaceous of Japan (Mentioned in: George Olshevsky on "Kagasaurus" and Fukuiraptor, from the Dinosaur Mailing List (at the bottom).)
- "Koreanosaurus" theropod from the Late Cretaceous of Japan (Needs to be renamed due to already being used for a species of ornithopod) (Mentioned in: Kim, 1993. Journal of Natural History and Environments 1(1). World Society of Natural History and Environments:Pusan University, Pusan, Korea. ISSN 1225-6404.)
- "Merosaurus" theropod from the Early Jurassic of England. (Mentioned in this paper: Pickering, S., 1995. "Jurassic Park: Unauthorized Jewish Fractals in Philopatry," A Fractal Scaling in Dinosaurology Project, 2nd revised printing, Capitola, California: 478 pp.)
- "Ngexisaurus" theropod from the Middle Jurassic of Tibet. (Mentioned in this paper: Zhao, X. (1983). "Phylogeny and evolutionary stages of Dinosauria." Acta Palaeontologica Polonica 28(1-2); 295-306)
- Guabisaurus tested to be a neotheropod (XXX Jornadas Argentinas de Paleontologia de Vertebrados)
- "Shake-N-Bake" coelophysoid from the Kayenta Formation (Mentioned in this paper: A new ceratosaurid theropod from the Early Jurassic Kayenta Formation of northern Arizona. Journal of Vertebrate Paleontology 17 (3, Supplement))
- Kenyan "giant" abelisaurid from the Late Cretaceous (SVP 2015???)
- Possible ceratosaurid "Bayosaurus" from the Late Cretaceous of Argentina (Mentioned in: http://www.nrcresearchpress.com/doi/abs/10.1139/e06-025?journalCode=cjes#.WahTRHeGOCQ)
- Possible ceratosaurid "Newtonsaurus" from the Late Triassic of the UK (Mentioned in this paper: Newton, E.T. (1899). On a megalosaurid jaw from Rhaetic beds near Bridgend (Glamorganshire). Quarterly Journal of the Geological Society of London 55:89-96.)
- Giant "Lightning Claw" megaraptorid from the Cretaceous of Australia (http://phenomena.nationalgeographic.com/2015/09/11/paleo-profile-lightning-claw/)
- African "digging raptor", probably a noasaurid ()
- the Spinosaurus neotype monograph, supposed to reinforce the quadrupedal theory (Ibrahim et al. 2014)
- large spinosaurid finger bones from the Lower Cretaceous of Spain (11th Congreso de la Associacion Paleontologica Argentina, pg 48)
- new metriacanthosaurid from Thailand (SVP 2016, pg 217)
- "Yuanmouraraptor" carnosaur from the Lower Jurassic of Yuanmou County, Yunnan Province, China ()
- Concavenator confirmed as a basal carcharodontosaurid, megaraptorans retained within neovenatorids (SVP 2016, pg 122)
- "Plumed Tyrant", Yutyrannus-like with large feathers on the hips (mentioned on the Bite Stuff Blog)
- New Mexico trackway appears to show a group of tyrannosauroids chasing a ceratopsian across a river (SVP 2016, pg 253)
- tyrannosauroids exhibit niche ontogenic partitioning, most extreme in Tyrannosaurus but evident other genera as well (SVP 2016, pg 107)
- a very complete juvenile Tyrannosaurus with bearing on the "Nanotyrannus" hypothesis (SVP 2015)
- the "fighting dinosaurs" tyrannosaur ()
- "Alamotyrannus" large tyrannosaurid previously assigned to Tyrannosaurus from New Mexico (Hone 2016)
- a new tyrannosaurid with paleoart being worked on by Sergey Krasovskiy (Mentioned on Krasovskiy's Twitter account: https://twitter.com/SergeyAtrox1/status/1157754415316684800)
- a new possible tyrannosaurid "Futabasaurus" from the Late Cretaceous of Japan (Needs to be renamed due to the name already being used for a species of plesiosaur) (https://web.archive.org/web/20130929081120/http://archosaur.us/theropoddatabase/Neotheropoda.htm)
- a new possible tyrannosaur "Tonouchisaurus" from the Early Cretaceous of Mongolia (Mentioned in: http://dml.cmnh.org/1996Jan/msg00713.html)
- a new species of the tyrannosaur Daspletosaurus from the Late Cretaceous Dinosaur Park Formation of Alberta, Canada (Mentioned in this paper: Currie, Philip J. (2003). "Cranial anatomy of tyrannosaurids from the Late Cretaceous of Alberta" (PDF). Acta Palaeontologica Polonica. 48 (2): 191–226.)
- a possible new species of albertosaurine tyrannosaur from the Late Cretaceous Two Medicine Formation of Montana ()
- a possible new species of albertosaurine tyrannosaur from the Late Cretaceous Oldman Formation of Alberta, Canada ()
- a possible new species of tyrannosaur from the Late Cretaceous Aguja Formation of Mexico (Mentioned in: Mortimer, M (2004). "Tyrannosauroidea". The Theropod Database. Archived from the original on 2013-09-29. Retrieved 2007-08-21.)
- the "Sir William" tyrannosaur from the Late Cretaceous Judith River Formation of Alberta, Canada (Mentioned in this paper: Stein and Triebold (2005). "Preliminary analysis of a sub-adult tyrannosaurid skeleton, known as "Sir William" from the Judith River Formation of Petroleum County, Montana." In The origin, systematics, and paleobiology of Tyrannosauridae, a symposium hosted jointly by Burpee Museum of Natural History and Northern Illinois University, p. 27-28.)
- European basal ornithomimosaur, said to be from a bonebed ()
- a partial skeleton of Struthiomimus found within the "three meter gap" (SVP 2016, pg 98)
- "Grusimimus" ornithomimid from the Early Cretaceous Shinekhudag Formation of Mongolia (Mentioned in: Mortimer, M. (2018). "Ornithomimosauria". TheropodDatabase. Retrieved 2018-07-17.)
- "Orcomimus" ornithomimid from the Late Cretaceous of South Dakota. (Mentioned in this paper: Triebold, M. (1997). "The Sandy site: Small dinosaurs from the Hell Creek Formation of South Dakota." in Wolberg, D., Stump, E. and Rosenberg, G. (eds); Dinofest International: Proceedings of a Symposium. Arizona State University Academy of Natural Science. 245-48)
- "Saltillomimus" ornithomimid from the Late Cretaceous Cerro del Pueblo Formation of Mexico (Mentioned in: "Ornithomimosauria". TheropodDatabase)
- "Sanchisaurus" ornithomimid from the Early Cretaceous of Japan (Mentioned in this paper: Dong, Zhiming; Y. Hasegawa; Y. Azuma (1990). The Age of Dinosaurs in Japan and China. Fukui, Japan: Fukui Prefectural Museum. p. 65 pp.)
- "Sidormimus" ornithomimid ()
- nearly complete specimen of the alvarezsaur Alnashetri (XXX Jornadas Argentinas de Paleontologia de Vertebrados)
- new basal therizinosaur more derived than Falcarius, known from a mass grave ()
- therizinosaur tracks from the Campanian of Colorado (SVP 2016, pg 227)
- new mid-Cretaceous therizinosaur from Mongolia with only two functional fingers (SVP 2015)
- a new therizinosaurid from the Cedar Mountain Formation ()
- a new didactyl therizinosaur from the Cretaceous of Mongolia (Mentioned here: https://twitter.com/TomHoltzPaleo/status/1150736809485361153)
- "Tiantaisaurus'' therizinosaur from the Laijia Formation of Zhejiang Province, China (Mentioned in: http://dml.cmnh.org/2016Jan/msg00088.html)
- Utah giant oviraptorosaur ()
- "Ronaldoraptor" oviraptorid from Mongolia (Mentioned in A Field Guide to Dinosaurs: The Essential Handbook for Travelers in the Mesozoic)
- ligament constraints would have prevented Microraptor from achieving a "four-winged" configuration (SVP 2016, pg 182)
- new partial eudromaeosaur from China (SVP 2016, pg 170)
- Utahraptor bonebed (Western Association of Vertebrate Paleontology Annual Meeting)
- the "Dave" dromeosaurid from the Early Cretaceous Yixian Formation of China which may be a new specimen of Sinornithosaurus (Mentioned in these papers: https://bioone.org/journals/bulletin-of-the-american-museum-of-natural-history/volume-2012/issue-371/748.1/A-Review-of-Dromaeosaurid-Systematics-and-Paravian-Phylogeny/10.1206/748.1.short    http://digitallibrary.amnh.org/handle/2246/6352)
- "Julieraptor" dromeosaur from the Cretaceous Judith River Formation of Montana (Mentioned in: http://blog.hmns.org/2012/06/bakker-blogs-the-kleptomania-continues-with-a-sid-vicious-julieraptor-dino-rustlers-part-ii/)
- four new dromeosaurids from the Cedar Mountain Formation ()
- a possible new dromeosaurid from the Late Cretaceous Wahweap Formation of Utah ()
- a possible new species of deinonychosaur or troodontid from the Early Cretaceous Yixian Formation of China (Mentioned in this paper: https://onlinelibrary.wiley.com/doi/abs/10.1002/gj.1044)
- troodontid tooth anatomy supports a carnivorous diet (SVP 2016, pg 207)
- SPS 100/44 ("EK troodontid") from the Early Cretaceous of Mongolia. (Barsbold, Rhinchen, Osmolska, Halszka, Kurzanov, S.M. (1987). "On a new troodontid (Dinosauria. Theropoda) from the Early Cretaceous of Mongolia". Acta Palaeontologica Polonica 32(1-2): 121-132)
- a new troodontid from the Cedar Mountain Formation ()
- a possible new species of troodontid similar to Mei from the Early Cretaceous Yixian Formation of China (Mentioned in this paper:  Hwang, Norell, Ji and Gao, (2004). "A new troodontid from the lower Yixian Formation of China and its affinities to Mongolian troodontids." Journal of Vertebrate Paleontology, 24(3): 73A–74A.)
- "Proornis" bird from the Early Cretaceous of North Korea. (Mentioned in this paper: Li, Quanguo, Gao, Ke-qin (2007). "Lower Cretaceous vertebrate fauna from the Sinuiju basin, North Korea as evidence of geographic extension of the Jehol Biota into the Korean Peninsula". "Journal of Vertebrate Paleontology" 27, supplement to number (3). pp.106A.)
- new feather type identified in Anchiornis, implications for feather shape in other coelurosaurs (The Palaeontological Association 60th Annual Meeting, pg 102)
- a new smaller and more advanced confuciusornithid from the Yixian with an enantiornith finger in its stomach (SVP 2016, pg 246)
- a new confuciusornithid from the Huajiying Formation of China (SVP 2016, pg 195)
- the gigantism of Gargantuavis may not be island related (XIV Annual Meeting of the European Association of Vertebrate Palaeontologists)
- new bird fossils from Cenomanian of Texas including Flexomornis and a rather large bird (SVP 2016, pg 241)
- late Cretaceous bird remains from Madagascar including more complete specimens of Vorona and more primitive birds, neornithines apparently absent (SVP 2016, pg 198)
- Hesperornithoform, icthyornithoform, and two ornithurines from the Hell Creek Formation in Montana (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3174646/)
- a new hesperornithiform from the Cedar Mountain Formation ()
- a possible new species of bird from the Eocene Green River Formation of Wyoming ()
- calcium isotopes confirm Gastornis was a herbivore (SVP 2016, pg 241)
- lower jaw from Pliocene California, previously assigned to a teratorn, is suggested to belong to Titanis, making it the earliest known remains from North America and the first in the west (Western Association of Vertebrate Paleontology Annual Meeting)




Sauropodomorphs:
- hatchling sauropod trackways indicate they were gregarious (XIV Annual Meeting of the European Association of Vertebrate Palaeontologists)
- chemical analysis indicates some sauropods in the Morrison Formation annually migrated in search of resources (SVP 2016, pg 140)
- "giant" bipedal sauropodomorph from South Africa ()
- nearly complete Argentinian Early Jurassic sauropodomorph preserves four sacral vertebrae as in later sauropods (11th Congreso de la Associacion Paleontologica Argentina, pg 47)
- the "Archbishop" brachiosaur ()
- a new titanosauriforme and a diplodocoid from Thailand (SVP 2016, pg 223)
- a new gigantic titanosaur with a very long neck and a shorter body (XXX Jornadas Argentinas de Paleontologia de Vertebrados)
- new Santonian titanosaur from Argentina with an unusual skull (11th Congreso de la Associacion Paleontologica Argentina, pg 45)
- a possible new species of euhelopid sauropod from the Early Cretaceous ()
- one or more possible new species of possible titanosaurs from the Early Cretaceous Yixian Formation of China (Mentioned in this paper: https://www.sciencedirect.com/science/article/pii/S1871174X0700025X?via%3Dihub)
- the "Livingston sauropod" from the Late Jurassic of Montana ()
- the "Gnatalie" sauropod from the Late Jurassic Brushy Basin Member of the Morrison Formation of Utah (Mentioned in: https://www.youtube.com/watch?v=IgmC8qAmQ_4)
- "Angoloposeidon" brachiosaurid from the Early Cretaceous of southern England. (https://svpow.com/2007/12/10/world-first-a-peek-inside-angloposeidon/)
- Possible cetiosaur "Dachongosaurus" from the Early Jurassic of China (Mentioned in this paper: Zhao, 1985. The reptilian fauna of the Jurassic in China. Pages 286–289, 347 in Wang, Cheng and Wang (eds.). The Jurassic System of China. Geological Publishing House, Beijing.)
- "Damalasaurus" sauropod from the Early Jurassic of Tibet (Mentioned in this paper: Zhao, 1985. The reptilian fauna of the Jurassic in China. Pages 286–289, 347 in Wang, Cheng and Wang (eds.). The Jurassic System of China. Geological Publishing House, Beijing)
- "Fendusaurus" prosauropod from the Early Jurassic McCoy Brook Formation of Nova Scotia ()
- "Gspsaurus" titanosaur from the Late Cretaceous Vitakri Formation of Pakistan (Mentioned in this paper: https://www.researchgate.net/publication/282295653_Titanosaurian_sauropod_dinosaurs_from_Pakistan)
- Possible nemegtosaurid "Hisanohamasaurus" from the Late Cretaceous of Japan (Mentioned in this paper: Zhiming, Dong; Y. Hasegawa; and Y. Azuma (1990). The Age of Dinosaurs in Japan and China. Fukui, Japan: Fukui Prefectural Museum.)
- "Kunmingosaurus" primitive sauropod from the Early Jurassic of Yunnan Province, China (Mentioned in this paper: Zhao, 1985. The reptilian fauna of the Jurassic in China. Pages 286–289, 347 in Wang, Cheng and Wang (eds.). The Jurassic System of China. Geological Publishing House, Beijing.)
- "Lancanjiangosaurus" sauropod from the Middle Jurassic of Tibet (Mentioned in this paper: Zhao, 1985. The reptilian fauna of the Jurassic in China. Pages 286–289, 347 in Wang, Cheng and Wang (eds.). The Jurassic System of China. Geological Publishing House, Beijing.)
- "Maojandino" titanosaur from the Late Cretaceous Vitakri Formation of Pakistan (Mentioned in this paper: https://www.researchgate.net/publication/282295653_Titanosaurian_sauropod_dinosaurs_from_Pakistan)
- "Megacervixosaurus" sauropod from the Late Cretaceous of China (Mentioned in this paper: Zhao X. (1985). "Phylogeny and evolutionary stages of Dinosauria." Acta Palaeontologica Polonica 28(1-2); 295-306.)
- "Microdontosaurus" sauropod from the Middle Jurassic of China (Mentioned in this paper: Zhao, 1985. The reptilian fauna of the Jurassic in China. Pages 286–289, 347 in Wang, Cheng and Wang (eds.). The Jurassic System of China. Geological Publishing House, Beijing)
- "Moshisaurus" sauropod from the Early Cretaceous Miyako Group of Japan (Mentioned in this paper: Hasegawa Y, Manabe M, Hanai T, Kase T, Oji T. 1991. A diplodocoid dinosaur from the Early Cretaceous Miyako Group of Japan. Bulletin of the National Science Museum, Tokyo, Series C 17: 1–9.)
- "Nicksaurus" sauropod from the Late Cretaceous Vitakri Formation of Pakistan (Mentioned in this paper: https://www.researchgate.net/publication/282295653_Titanosaurian_sauropod_dinosaurs_from_Pakistan)
- "Nurosaurus" sauropod from the Cretaceous of China (Mentioned in: http://www.paleofile.com/Demo/Mainpage/Taxalist/Dinosaurs/Sauropoda.htm)
- "Oshanosaurus" sauropod from the Early Jurassic of China (Mentioned in this paper: Zhao, 1985. The reptilian fauna of the Jurassic in China. Pages 286–289, 347 in Wang, Cheng and Wang (eds.). The Jurassic System of China. Geological Publishing House, Beijing)
- a new possible cetiosaurid "Rutellum" from the Middle Jurassic of England (Mentioned in this paper: Delair, J.B., and Sarjeant, W.A.S. (2002). The earliest discoveries of dinosaurs: the records re-examined. Proceedings of the Geologists' Association 113:185–197.)
- "Saraikimasoom" titanosaur from the Late Cretaceous Vitakri Formation in Pakistan (Mentioned in this paper: https://www.researchgate.net/publication/282295653_Titanosaurian_sauropod_dinosaurs_from_Pakistan)
- a new possible camarasaurid "Sugiyamasaurus" from the Late Cretaceous of Japan (Mentioned in Lambert D. (1993). The Ultimate Dinosaur Book. Dorling Kindersley, New York. ISBN 0-86438-417-3)
- Possible titanosauriform "Xinghesaurus" (Mentioned in the 2009 guidebook for the dinosaur expo "Miracle of Deserts")
- "Yibiinosaurus" sauropod from the Early Jurassic of China (Mentioned in the 2001 Chongqing Natural History Museum guidebook)
- "Yunxianosaurus" titanosaur from the Late Cretaceous of China (Mentioned in this paper: Li, Zhengqi. (2001). Distribution, burying and classification of dinosaur fossils in Upper Cretaceous strata at Meipu Town, Yunxian County of Hubei Province. Hubei Geology & Mineral Resources, 15(4)(Total No 37): 25-31. [1])



Ornithischians:
- evolutionary reinforcement theory explains the patterns in evolution of display structures in North American ornithischians to encourage reproductive isolation in recently split taxa (SVP 2016, pg 138)
- ornithischians display structures are more variable than those seen in birds or mammals, but are on par with squamates.  A socio-sexual display function is most likely (SVP 2016, pg 105)
- Possible ceratopsian or ornithopod "Magulodon" from the Early Cretaceous of Maryland (Mentioned in this paper: Kranz, P. (1996). Notes on the sedimentary iron ores of Maryland and their dinosaurian faunas. Maryland Geological Survey Special Publications 3:87-115.)
- possible new ankylosaur from the Lower Morrison Formation of Wyoming (SVP 2016, pg 167)
- new fragmentary ankylosaur from Arkansas (SVP 2016, pg 191)
- between 3 and 6 unrecognized ankylosaur species from Late Cretaceous North America, including a large taxa (SVP 2016, pg 203)
- young nodosaurid from Late Cretaceous Alabama (SVP 2016, pg 106)
- a new thyreophoran from Malaysia ()
- a possible new ankylosaur from the Late Cretaceous Wahweap Formation of Utah ()
- a possible new ankylosaur from the Early Cretaceous Wayan Formation of Idaho (Mentioned in this paper: http://www.utahpaleo.org/pdf/Mid-Mesozoic/Mid_Mesozoic_Proceedings_final.pdf)
- a possible new species of nodosaurid ankylosaur from the Late Cretaceous Judith River Formation of Montana ()
- "Hanwulosaurus" ankylosaur from the Late Cretaceous of China (Mentioned in: http://dml.cmnh.org/2001Nov/msg00438.html)
- preserved melanosomes and tissue structures in Kulindadromeus feathers and scales (The Palaeontological Association 60th Annual Meeting, pg 42)
- a possible new species of stegosaur from the Early Cretaceous Camarillas Formation of Spain ()
- a new skull of Stygimoloch that suggests that both it and Dracorex are distinct from Pachycephalosaurus (Mentioned on Pete Larson's Twitter account: https://twitter.com/petelarsontrex/status/870072243786838016?lang=en)
- two new Stegoceras-like pachycephalosaurs from Utah and New Mexico, both with nearly complete skulls (SVP 2016, pg 132)
- a new pachycephalosaur from the Cedar Mountain Formation ()
- a possible new pachycephalosaur from the Two Medicine Formation ()
- "Microcephalae" pachycephalosaur from the Late Cretaceous of Alberta, Canada ()
- Triceratops skin impressions ()
- the "fighting dinosaurs" ceratopsian ()
- a new psittacosaurid ceratopsian from the Lower Cretaceous Kitadani Formation of Japan (Mentioned in this paper: Weishampel, D.B.; et al. (2004). "Dinosaur distribution (Early Cretaceous, Asia)." In: Weishampel, D.B.; Dodson, P.; and Osmólska, H. (eds.): The Dinosauria, 2nd, Berkeley: University of California Press)
- "Durateceratops" chasmosaurine ceratopsian from the Late Cretaceous Hell Creek Formation of Montana (Mentioned in: https://rapidcityjournal.com/news/local/dinosaur-skull-found-in-buffalo-likely-a-new-species/article_b33d3375-b74c-5941-aa0b-281ad59b430a.html)
- "Mihunekisaurus" ceratopsian from the Cretaceous of Japan ()
- "Scaniaceratops" ceratopsian from Sweden ()
- a new neoceratopsid from the Cedar Mountain Formation ()
- a new species of centrasaurine ceratopsian from the Late Cretaceous Judith River Formation of Montana ()
- a new basal ornithopod known from a partial skeleton from Mid Cretaceous Utah, also a new orodromine mentioned (SVP 2016, pg 256)
- a possible new gasparinisaurid from the Early Cretaceous Santana Formation of Brazil ()
- a possible new species of thescelosaurid from the Two Medicine Formation ()
- Possible ornithopod "Eugongbusaurus" from the Late Jurassic of China (Mentioned in this paper: Knoll, Fabien (1999). "The family Fabrosauridae". In Canudo, J.I.; and Cuenca-Bescós, G. (eds.). IV European Workshop on Vertebrate Palaeontology, Albarracin (Teruel, Spain), junio de 1999. Programme and Abstracts, Field guide. Servicio Publicaciones Universidad de Zaragoza. p. 54.)
- the "Sniffles" ornithopod from the Late Jurassic Morrison Formation of Wyoming ()
- African Kangnasaurus suggested to be an elasmarian (XXX Jornadas Argentinas de Paleontologia de Vertebrados)
- new Chilean hadrosaur (XIV Annual Meeting of the European Association of Vertebrate Palaeontologists)
- a new Gryposaurus species known from a monodominant bonebed reveals ontogenic change (SVP 2016, pg 140)
- tracks in Alaska indicate young hadrosaurs were facultative bipeds just like adults, not fully bipedal (SVP 2016, pg 136)
- "Walter" giant Colorado hadrosaur with skin impressions (http://www.theheraldtimes.com/dinosaur-with-skin-on-a-rare-paleontology-find/rio-blanco-county/)
- "Heilongjiangosaurus" hadrosaur from the Late Cretaceous of China. (Mentioned in this paper: On the Upper Cretaceous Jiayin Group of Heilongjiang Province, China)
- Possible hadrosaur "Hironosaurus" from the Late Cretaceous of Japan (Mentioned in this paper: Hisa, K; Fukami, K; Murata, T; Shibuki, S; Haruyama, T; Tozawa, Y; Takeuchi, M; Sato, S; et al. (1988). "unknown" [A case of ileal hemorrhagic infarction of unknown origin (author's transl)]. Utan Scientific Magazine (in Japanese). 25 (: 871–4. PMID 6968365.)
- a new hadrosaur from the Talkeetna Mountains in Alaska (Mentioned in this paper: Hadrosaur Skeletal Material from the Talkeetna Mountains)
- a new ribcage from a hadrosaur of as yet undetermined species from the Late Cretaceous of Montana ()
- a new study finds that the skull of Muttaburrasaurus did not possess the sound-creating resonating chambers with which the animal is often depicted ()
- "Bihariosaurus" iguanodontian from the Late Cretaceous of Romania (Mentioned in this paper: Posmoşanu, E. (2003). "Iguanodontian dinosaurs from the lower Cretaceous Bauxite site from Romania" (PDF). Acta Paleontologica Romaniae. 4: 431–439.)
- a new sail-backed iguanodont from the Cedar Mountain Formation (Mentioned in this paper: http://www.miketaylor.org.uk/tmp/Kirkland%20et%20al%201999%20-%20distrib%20of%20Cedar%20Mtn%20Fm%20vert%20faunas.pdf)




Pterosaurs:
- a long-tailed anurognathid from the Jurassic of China (Flugsaurier 2015)
- retroversion of the pubis in pterodactyloids likely occurred independently in several lineages, musculature indicates vertical climbing would have been very difficult with the hindlimbs (SVP 2016, pg 140)
- ligament constraints would have prevented pterosaurs from raising their legs into a bat-like posture while in flight (SVP 2016, pg 182)
- growth patterns find Pteranodon to be altricial and Caiuajara to be precocial (XXX Jornadas Argentinas de Paleontologia de Vertebrados)
- additional examples of pterosaur sexual dimorphism in Pterodactylus, Aurorazhdarcho, and Pteranodon (SVP 2016, pg 89)
- "Rhamphodactylus" transitional form ()
- new very complete istiodactylid from China (SVP 2015)
- "Moon Goddess" lonchodectid (Witton's pterosaur book)
- Chilean pterosaur with upturned jaws ()
- new pterodactyloid from the Santana formation of Brazil (Flugsaurier 2015)
- possible dsungaripterid from Wyoming (Flugsaurier 2015)
- South American dsungaripterid with small teeth on the midline of the lower jaw ()
- possible pteranodontid/nyctosaurid remains from the Kaiparowits Formation, late Campanian Utah (SVP 2016, 186)
- a well preserved rear portion of the skull of Tupuxara showing crest fibers and melanosomes indicating a striped pattern, as well as pycnofibers at the back of the skull and upper neck (XIV Annual Meeting of the European Association of Vertebrate Palaeontologists)
- the gate pattern of Quetzalcoatlus was more like that of a bipedal animal (11th International Congress of Vertebrate Morphology)
- a new azhdarchid (possible new species of Quetzalcoatlus) from the Late Cretaceous Hell Creek Formation of Montana (Mentioned in this paper:  Henderson and Peterson (2006) 192–195.)
- a possible new species of azdarchoid pterosaur ("Mongol Giant") from the Late Cretaceous Nemegt Formation of Mongolia (Mentioned in this paper:  Takanobu Tsuihiji, Brian Andres, Patrick M. O'connor, Mahito Watabe, Khishigjav Tsogtbaatar & Buuvei Mainbayar (2017) Gigantic pterosaurian remains from the Upper Cretaceous of Mongolia, Journal of Vertebrate Paleontology doi:10.1080/02724634.2017.1361431)
- a possible new species of dimorphodontid pterosaur from the Early Jurassic Upper Elliot Formation of South Africa ()
- "Oolithorhynchus" pterosaur (Mentioned in: https://web.archive.org/web/20070701145445/http://www.archosauria.org/pterosauria/taxonomy/genera.html




Marine Reptiles:
- large very complete basal thalattosaur from Oregon with a skull similar to Thalattosaurus (SVP 2016, pg 188)
- a new tanystrophid from the Zorzino Limestone in Italy ()
- partial skeleton of a large macropredatory ichthyosaur from late Triassic British Columbia (SVP 2016, pg 253)
- reevaluation of Shonisaurus remains indicate it had robust teeth suited for predation, additional remains of small individuals provide an ontogenic series (SVP 2016, pg 165)
- an early Cretaceous long-snouted ichthyosaur from Columbia and other diverse forms from the Paja Formation (XIV Annual Meeting of the European Association of Vertebrate Palaeontologists)
- plesiosaurs swam more efficiently at speed using all four flippers (SVP 2016, pg 193)
- plesiosaur neck stiffness was an adaptation to hunting schooling fish (SVP 2016, pg 253)
- a Triassic plesiosaur from Germany (SVP 2015)
- new species of the elasmosaur Callawaysaurus including a skull (XXX Jornadas Argentinas de Paleontologia de Vertebrados)
- large elasmosaurid remains from Antarctica (11th Congreso de la Associacion Paleontologica Argentina, pg 172)
- baleen whale like feeding adaptations in aristonectine elasmosaurs (SVP 2015)
- "Stereosaurus" plesiosaur from the Cretaceous of England. (Seeley, H.G. (1869). Index to the fossil remains of Aves, Ornithosauria and Reptilia, from the Secondary system of strata arranged in the Woodwardian Museum of the University of Cambridge. Cambridge, 143 pp.)
- the "Monster of Aramberri" pliosaur from Mexico (Mentioned in this paper: Buchy, Frey & al, 2003, First occurrence of a gigantic pliosaurid plesiosaur in the late Jurassic (Kimmeridgian) of Mexico Archived 2011-01-10 at the Wayback Machine, Bulletin de la Société Géologique de France, t. 174, n°3, pp. 271-278)
- the "Billings Plesiosaur" polycotylid from the Late Cretaceous of Montana ()
- a possible new species of plesiosaur from the Late Cretaceous Thermopolis Shale of Wyoming ()
- a new specimen of the dolichosaur Coniasaurus containing unborn embryos (5th Triennial Mosasaur Meeting)
- the genus Mosasaurus is over inflated, several species actually belong to Moanasaurus (SVP 2016, pg 232)
- a 6.5 meter Mosasaurus specimen from Alberta with a non-lethal bite mark on its jaw from another mosasaur (SVP 2016, 168)



Other Diapsid Reptiles:
- early turtle Cimexomys was semi-fossorial (SVP 2016, pg 247)
- a possible new species of nanhsiungchelyid turtle from the Lower Cretaceous Kitadani Formation of Japan ()
- a possible new species of giant turtle from the Early Cretaceous (Aptian) Khok Kraut Formation of Thailand (Image of the remains (source PaleoMedia Discord))
- Early Jurassic drepanosaurs from North America ()
- late Triassic stem-squamate from Arizona (SVP 2016, pg 167)
- a basal champsosaur from Hell Creek known from a maxilla (SVP 2016, pg 164)
- a new archosaur "Cinizasaurus" from the Late Triassic of New Mexico ()
- a new archosaur "Cryptoraptor" from the Late Triassic of New Mexico (Mentioned in: http://www.tandfonline.com/doi/abs/10.1017/S1477201907002040)
- a new rauisuchian (possible dinosaur) "Likhoelesaurus" from the Late Triassic of South Africa (Mentioned in: http://dml.cmnh.org/2000Sep/msg00035.html)
- the "Littlefoot" sphenosuchian from the Late Triassic Chinle Formation of Utah (Mentioned in: https://www.pbs.org/video/when-whales-walked-journeys-in-deep-time-sn9pvf/)
- new giant crocodyliform from early Late Cretaceous Morocco and Niger shows snout convergences with spinosaurids (SVP 2015)
- "Narynsuchus" goniopholid crocodilian from the Middle Jurassic of Kyrgyzstan. (Mentioned in this paper: Averianov, A. O. (2000). "Sunosuchus sp. (Crocodylomorpha, Goniopholididae) from the Middle Jurassic of Kirghisia". Journal of Vertebrate Paleontology. 20 (4): 776–779. doi:10.1671/0272-4634(2000)020[0776:SSCGFT]2.0.CO;2.)
- a possible new species of goniopholid crocodilian from the Lower Cretaceous Kitadani Formation of Japan (Mentioned in this paper:  Kobayashi, Y. 1998. A new goniopholid from the Early Cretaceous Kitadani Formation, Fukui Prefecture, Japan. Journal of Vertebrate Paleontology 18 (3): 56A.)
- large Chilean metriorhynchid ()
- a possible vertebra of a marine crocodile from the Late Cretaceous of Wyoming ()
- five new crocodilians from either the Early Cretaceous Elrahz Formation or the Early Cretaceous Echkar Formation (unsure which one) of Niger being described by Paul Sereno (Mentioned on Paul Sereno's Facebook page: https://www.facebook.com/paulserenoofficial/photos/pcb.10157790566147049/10157790565842049/?type=3&theater)
- a possible new species of boid snake from the Late Cretaceous Hell Creek Formation of Montana ()


Mammals:
- The "Gurlin Tsav skull" carnivorous metatherian mammal from the Late Cretaceous Nemegt Formation of Mongolia (Mentioned in this paper: S. Bi, X. Jin, S. Li and T. Du. 2015. A new Cretaceous metatherian mammal from Henan, China. PeerJ 3:e896)
- Steller's Sea Cow was a kelp specialist based on amino acid fingerprints (SVP 2016, pg 118)
- Syrian Camel (Camelus "moreli") from the Pleistocene of Syria (Mentioned in this paper: https://web.archive.org/web/20081230143542/http://elkowm.unibas.ch/Bilder/Publikationen/short-summary-2006.pdf)



Non-Mammalian Synapsids:
- giant cynognathid from Triassic of Namibia (SVP 2015)
- an arboreal traversodont cynodont from Tanzania known from a nearly complete skeletons (SVP 2016, pg 224)



Amphibians:
-



Fish:
- evidence of cannibalism in Dunkleosteus (SVP 2016, pg 148)
- a possible true sawfish from the Jurassic (XXX Jornadas Argentinas de Paleontologia de Vertebrados)
- a possible new primitive placoderm "Wangolepis" from the Early Silurian Dô Son Formation of Vietnam (Mentioned in this paper: Janvier, Philippe, et al. "Devonian fish (Placodermi, Antiarcha) from Tra Ban Island (Bai Tu Long Bay, Quang Ninh Province, Vietnam) and the question of the age of the Dô Son Formation." Journal of Asian Earth Sciences 21.7 (2003): 795-801)
- a possible new species of Leptolepis from the Late Jurassic Morrison Formation of Colorado ()
- a possible new species of fish from the Miocene of Montana ()



Invertebrates:
- a possible new species of flea from the Early Cretaceous Yixian Formation of China (Mentioned in this paper: https://www.nature.com/articles/nature10839)
- a possible new species of caddisfly from the Early Cretaceous Yixian Formation of China (Mentioned in this paper: https://www.sciencedirect.com/science/article/pii/S0195667110000224?via%3Dihub)



Other Studies:
- size is a poor predictor of maturity in basal dinosaurs (SVP 2016, pg 148)
- new Late Triassic assemblage from Argentina includes coelophysoids, sauropodomorphs, pterosaurs, crocodyliformes, lepidosaurs, and mammaliformes (11th Congreso de la Associacion Paleontologica Argentina, pg 108)
- new Jurassic site from South America (Argentina?) with extraordinary levels of 3D preservation due to volcanic ash ()
- Jehol/Yixian like formation from Late Cretaceous Australia ()
- new records of many small dinosaur species from Late Cretaceous North America suggest the ecosystem was healthy at the time (The Palaeontological Association 60th Annual Meeting, pg 88)
- a new species of dinosaur (group unknown) from the Late Cretaceous Hell Creek Formation (Mentioned here: https://twitter.com/NDGSPaleo/status/1184968304198389761)

Source Links:

11th Congreso de la Associacion Paleontologica Argentina:
http://media.wix.com/ugd/93fe01_e81a9c278194455480f5f312144db9b9.pdf

The Palaeontological Association 60th Annual Meeting:
http://www.palass.org/sites/default/files/media/publications/newsletters/number_93/annual_meeting_2016_abstracts_booklet.pdf

XXX Jornadas Argentinas de Paleontologia de Vertebrados:
http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/3066/4807

5th Triennial Mosasaur Meeting:
http://www.geology.lu.se/sites/geology.lu.se/files/abstract_volume_mmv_2016.pdf

11th International Congress of Vertebrate Morphology:
http://onlinelibrary.wiley.com/store/10.1002/(ISSN)1932-8494/asset/homepages/ICVM11-2016_Program__Abstracts.pdf?v=1&s=7eb17e1321fcb2e6d9d28c3ab2ba4ad4923820e0&isAguDoi=false

XIV Annual Meeting of the European Association of Vertebrate Palaeontologists:
http://www.eavp.oscartrapman.nl/EAVP%20Programme&Abstracts%20Volume.pdf

Western Association of Vertebrate Paleontology Annual Meeting:
http://escholarship.org/uc/item/3km3d2wm#page-1

Society of Vertebrate Paleontology 2016:
http://vertpaleo.org/PDFS/2016/SVP-2016-Program-Book-v10-with-covers.aspx

Society of Vertebrate Paleontology 2015:
http://vertpaleo.org/PDFS/SVP-2015-Program-and-Abstract-Book-9-22-2015.aspx

Flugsaurier 2015 Meeting:
links no longer work

I found a few hitherto undescribed specimens and/or taxa that have since been named:
- The coelophysoid from Argentina discussed by Martin Ezcurra in an abstract at the XXX Jornadas Argentinas de Paleontologia de Vertebrados is now named Powellvenator podocitus (Ezcurra 2017)
- the entry ""Itemirus" giant dromaeosaur from Mongolia (Field Guide to Mesozoic Birds)" is a mistake and should be deleted because Itemirus was found in Uzbekistan, and the additional skeletal material of Itemirus mentioned by Sues and Averianov (2004) (alluded to in Field Guide to Mesozoic Birds) was described by Sues and Averianov (2014)
- "Rutellum implicatum" is not a binomial but instead a Latin term (meaning "implicit little shovel") by Lhuyd (1699 ) for the sauropod tooth noted by Delair and Sarjeant (2002) and thus the entry "a new possible cetiosaurid "Rutellum" from the Middle Jurassic of England (Mentioned in this paper: Delair, J.B., and Sarjeant, W.A.S. (2002). The earliest discoveries of dinosaurs: the records re-examined. Proceedings of the Geologists' Association 113:185–197.)" should be deleted
- Malkani (2021) officially describes the titanosaurs Gspsaurus, Maojandino, Nicksaurus, and Saraikimasoom as new genera and species
- The entry "a dicreaosaurid skull from the Lower Cretaceous of Argentina is a first for the group, unusually gracile design (11th Congreso de la Associacion Paleontologica Argentina, pg 46)" is now named Bajadasaurus (Gallina et al. 2019).
- The entry "giant mostly complete Patagonian titanosaur weighing over 50 tons (SVP 2016, pg 110)" has been named Patagotitan (Carballido et al. 2017).
- The entry ""Livingston sauropod" from the Late Jurassic of Montana ()" actually refers to reports of Alamosaurus from the Evanston Formation of Wyoming and the Hell Creek Formation of Montana by Lucas & Hunt (1989) and Maxwell et al. (1967).
- The "nearly complete basal eusauropod from Cedar Mountain formation, Utah.  Mention of a new iguanodont and polacanthid (SVP 2016, pg 215)" has been named Mierasaurus by Royo-Torres et al. (2017)
- The entry "Protoichthyosaurus argued to be a valid genus (SVP 2016, pg 185)" should be deleted because Protoichthyosaurus is formally revalidated by Lomax et al. (2017).
- The entry ""Gadolosaurus" hadrosaur from the Bayan Shireh Formation of Baishan Tsav, Mongolia (Mentioned in this paper: Tsogtbaatar, K., D. Weishampel, D. C. Evans, and M. Watabe. (In review). A New Hadrosauroid (Dinosauria: Ornithopoda) from the Late Cretaceous Baynshire Formation of the Gobi Desert (Mongolia). PLOS ONE)" should be renamed "Unnamed hadrosaur from the Bayan Shireh Formation of Baishan Tsav, Mongolia (Averianov et al. 2022)" because "Gadolosaurus" is a Japanese translation of gadrosavr (Russian word for hadrosaur) and was never meant to be a new genus name, and the specimen informally dubbed "Gadolosaurus" has been assigned to Hadrosauroidea by Averianov et al. (2022) as a probable distinct taxon of basal hadrosauroid.

References:
Averianov AO, Lopatin AV, Tsogtbaatar K, and 2022. Taxonomic attribution of a juvenile hadrosauroid dinosaur from the Upper Cretaceous Bayinshire Formation of Mongolia. Doklady Rossijskoj Akademii Nauk. Nauki O Zemle. 503 (1): 26–31. doi:10.31857/S2686739722030033

Carballido, J.L.; Pol, D.; Otero, A.; Cerda, I.A.; Salgado, L.; Garrido, A.C.; Ramezani, J.; Cúneo, N.R.; Krause, J.M., 2017. A new giant titanosaur sheds light on body mass evolution among sauropod dinosaurs. Proceedings of the Royal Society B: Biological Sciences 284 (1860): 20171219. doi:10.1098/rspb.2017.1219. PMC 5563814. PMID 28794222.

Ezcurra, M.D., 2017. A new early coelophysoid neotheropod from the Late Triassic of northwestern Argentina. Ameghiniana 54(5): 506–538. doi:10.5710/AMGH.04.08.2017.3100.

Gallina, P.A.; Apesteguía, S.; Canale, J.I., and Haluza, A., 2019. A new long-spined dinosaur from Patagonia sheds light on sauropod defense system. Scientific Reports 9 (1): 1392. doi:10.1038/s41598-018-37943-3.

Lomax, D.R.; Massare, J.A. and Mistry, R.T. (2017). The taxonomic utility of forefin morphology in Lower Jurassic ichthyosaurs: Protoichthyosaurus and Ichthyosaurus. Journal of Vertebrate Paleontology 37 (5): e1361433. doi:10.1080/02724634.2017.1361433. S2CID 90238537.

Lucas, S. G., and A. P. Hunt. 1989. Alamosaurus and the sauropod hiatus in the Cretaceous of the North American western interior. Pages 75–85 in J. O. Farlow, editor. Paleobiology of the dinosaurs. Geological Society of America, Boulder, Colorado. Special Paper 238.

Malkani, M., 2021. Jurassic-Cretaceous and Cretaceous-Paleogene Transitions and Mesozoic Vertebrates from Pakistan. Open Journal of Geology 11: 275-318.

Maxwell, R. A., J. T. Lonsdale, R. T. Hazzard, and J. A. Wilson. 1967. Geology of Big Bend National Park, Brewster County, Texas [enormous file!]. University of Texas Bureau of Economic Geology Publication 6711.

Royo-Torres, R.; Upchurch, P.; Kirkland, J.I.; DeBlieux, D.D.; Foster, J.R.; Cobos, A.; and Alcalá, L., 2017. Descendants of the Jurassic turiasaurs from Iberia found refuge in the Early Cretaceous of western USA". Scientific Reports 7 (1): 14311. doi:10.1038/s41598-017-14677-2.

Sues and Averianov, 2004. Dinosaurs from the Upper Cretaceous (Turonian) of Dzharakuduk, Kyzylkum Desert, Uzbekistan. Journal of Vertebrate Paleontology 24(3), 51A-52A.

Sues, H.-D., and Averianov, A., 2014. Dromaeosauridae (Dinosauria: Theropoda) from the Bissekty Formation (Upper Cretaceous: Turonian) of Uzbekistan and the phylogenetic position of Itemirus medullaris Kurzanov, 1976. Cretaceous Research 51: 225–240. doi:10.1016/j.cretres.2014.06.007.

[Logo7]

I found a few hitherto undescribed specimens and/or taxa that have since been named:
- The coelophysoid from Argentina discussed by Martin Ezcurra in an abstract at the XXX Jornadas Argentinas de Paleontologia de Vertebrados is now named Powellvenator podocitus (Ezcurra 2017)
- the entry ""Itemirus" giant dromaeosaur from Mongolia (Field Guide to Mesozoic Birds)" is a mistake and should be deleted because Itemirus was found in Uzbekistan, and the additional skeletal material of Itemirus mentioned by Sues and Averianov (2004) (alluded to in Field Guide to Mesozoic Birds) was described by Sues and Averianov (2014)
- "Rutellum implicatum" is not a binomial but instead a Latin term (meaning "implicit little shovel") by Lhuyd (1699 ) for the sauropod tooth noted by Delair and Sarjeant (2002) and thus the entry "a new possible cetiosaurid "Rutellum" from the Middle Jurassic of England (Mentioned in this paper: Delair, J.B., and Sarjeant, W.A.S. (2002). The earliest discoveries of dinosaurs: the records re-examined. Proceedings of the Geologists' Association 113:185–197.)" should be deleted
- Malkani (2021) officially describes the titanosaurs Gspsaurus, Maojandino, Nicksaurus, and Saraikimasoom as new genera and species
- The entry "a dicreaosaurid skull from the Lower Cretaceous of Argentina is a first for the group, unusually gracile design (11th Congreso de la Associacion Paleontologica Argentina, pg 46)" is now named Bajadasaurus (Gallina et al. 2019).
- The entry "giant mostly complete Patagonian titanosaur weighing over 50 tons (SVP 2016, pg 110)" has been named Patagotitan (Carballido et al. 2017).
- The entry ""Livingston sauropod" from the Late Jurassic of Montana ()" actually refers to reports of Alamosaurus from the Evanston Formation of Wyoming and the Hell Creek Formation of Montana by Lucas & Hunt (1989) and Maxwell et al. (1967).
- The "nearly complete basal eusauropod from Cedar Mountain formation, Utah.  Mention of a new iguanodont and polacanthid (SVP 2016, pg 215)" has been named Mierasaurus by Royo-Torres et al. (2017)
- The entry "Protoichthyosaurus argued to be a valid genus (SVP 2016, pg 185)" should be deleted because Protoichthyosaurus is formally revalidated by Lomax et al. (2017).
- The entry ""Gadolosaurus" hadrosaur from the Bayan Shireh Formation of Baishan Tsav, Mongolia (Mentioned in this paper: Tsogtbaatar, K., D. Weishampel, D. C. Evans, and M. Watabe. (In review). A New Hadrosauroid (Dinosauria: Ornithopoda) from the Late Cretaceous Baynshire Formation of the Gobi Desert (Mongolia). PLOS ONE)" should be renamed "Unnamed hadrosaur from the Bayan Shireh Formation of Baishan Tsav, Mongolia (Averianov et al. 2022)" because "Gadolosaurus" is a Japanese translation of gadrosavr (Russian word for hadrosaur) and was never meant to be a new genus name, and the specimen informally dubbed "Gadolosaurus" has been assigned to Hadrosauroidea by Averianov et al. (2022) as a probable distinct taxon of basal hadrosauroid.

References:
Averianov AO, Lopatin AV, Tsogtbaatar K, and 2022. Taxonomic attribution of a juvenile hadrosauroid dinosaur from the Upper Cretaceous Bayinshire Formation of Mongolia. Doklady Rossijskoj Akademii Nauk. Nauki O Zemle. 503 (1): 26–31. doi:10.31857/S2686739722030033

Carballido, J.L.; Pol, D.; Otero, A.; Cerda, I.A.; Salgado, L.; Garrido, A.C.; Ramezani, J.; Cúneo, N.R.; Krause, J.M., 2017. A new giant titanosaur sheds light on body mass evolution among sauropod dinosaurs. Proceedings of the Royal Society B: Biological Sciences 284 (1860): 20171219. doi:10.1098/rspb.2017.1219. PMC 5563814. PMID 28794222.

Ezcurra, M.D., 2017. A new early coelophysoid neotheropod from the Late Triassic of northwestern Argentina. Ameghiniana 54(5): 506–538. doi:10.5710/AMGH.04.08.2017.3100.

Gallina, P.A.; Apesteguía, S.; Canale, J.I., and Haluza, A., 2019. A new long-spined dinosaur from Patagonia sheds light on sauropod defense system. Scientific Reports 9 (1): 1392. doi:10.1038/s41598-018-37943-3.

Lomax, D.R.; Massare, J.A. and Mistry, R.T. (2017). The taxonomic utility of forefin morphology in Lower Jurassic ichthyosaurs: Protoichthyosaurus and Ichthyosaurus. Journal of Vertebrate Paleontology 37 (5): e1361433. doi:10.1080/02724634.2017.1361433. S2CID 90238537.

Lucas, S. G., and A. P. Hunt. 1989. Alamosaurus and the sauropod hiatus in the Cretaceous of the North American western interior. Pages 75–85 in J. O. Farlow, editor. Paleobiology of the dinosaurs. Geological Society of America, Boulder, Colorado. Special Paper 238.

Malkani, M., 2021. Jurassic-Cretaceous and Cretaceous-Paleogene Transitions and Mesozoic Vertebrates from Pakistan. Open Journal of Geology 11: 275-318.

Maxwell, R. A., J. T. Lonsdale, R. T. Hazzard, and J. A. Wilson. 1967. Geology of Big Bend National Park, Brewster County, Texas [enormous file!]. University of Texas Bureau of Economic Geology Publication 6711.

Royo-Torres, R.; Upchurch, P.; Kirkland, J.I.; DeBlieux, D.D.; Foster, J.R.; Cobos, A.; and Alcalá, L., 2017. Descendants of the Jurassic turiasaurs from Iberia found refuge in the Early Cretaceous of western USA". Scientific Reports 7 (1): 14311. doi:10.1038/s41598-017-14677-2.

Sues and Averianov, 2004. Dinosaurs from the Upper Cretaceous (Turonian) of Dzharakuduk, Kyzylkum Desert, Uzbekistan. Journal of Vertebrate Paleontology 24(3), 51A-52A.

Sues, H.-D., and Averianov, A., 2014. Dromaeosauridae (Dinosauria: Theropoda) from the Bissekty Formation (Upper Cretaceous: Turonian) of Uzbekistan and the phylogenetic position of Itemirus medullaris Kurzanov, 1976. Cretaceous Research 51: 225–240. doi:10.1016/j.cretres.2014.06.007.

Thank you once again for the updates. I've shifted the actually undescribed specimens you mentioned over to the published list. However, I did not move the Malkani taxa, as they were not validly published due to being described without ZooBank registrations and in a journal that is known to be predatory. I'm also a little unsure about the "Livingston Sauropod," which I specifically based off of this specimen from the Museum of the Rockies. Is this now considered to be Alamosaurus too? Please let me know if you find anything else.

[GojiraGuy1954]

There's a giant eocene frog that's been left unnamed

Do you have a paper source for this? If so, I can add it to the list.

Evidence of a giant helmeted frog (Australobatrachia, Calyptocephalellidae) from Eocene levels of the Magallanes Basin, southernmost Chile

[VD231991]

I found a few hitherto undescribed specimens and/or taxa that have since been named:
- The coelophysoid from Argentina discussed by Martin Ezcurra in an abstract at the XXX Jornadas Argentinas de Paleontologia de Vertebrados is now named Powellvenator podocitus (Ezcurra 2017)
- the entry ""Itemirus" giant dromaeosaur from Mongolia (Field Guide to Mesozoic Birds)" is a mistake and should be deleted because Itemirus was found in Uzbekistan, and the additional skeletal material of Itemirus mentioned by Sues and Averianov (2004) (alluded to in Field Guide to Mesozoic Birds) was described by Sues and Averianov (2014)
- "Rutellum implicatum" is not a binomial but instead a Latin term (meaning "implicit little shovel") by Lhuyd (1699 ) for the sauropod tooth noted by Delair and Sarjeant (2002) and thus the entry "a new possible cetiosaurid "Rutellum" from the Middle Jurassic of England (Mentioned in this paper: Delair, J.B., and Sarjeant, W.A.S. (2002). The earliest discoveries of dinosaurs: the records re-examined. Proceedings of the Geologists' Association 113:185–197.)" should be deleted
- Malkani (2021) officially describes the titanosaurs Gspsaurus, Maojandino, Nicksaurus, and Saraikimasoom as new genera and species
- The entry "a dicreaosaurid skull from the Lower Cretaceous of Argentina is a first for the group, unusually gracile design (11th Congreso de la Associacion Paleontologica Argentina, pg 46)" is now named Bajadasaurus (Gallina et al. 2019).
- The entry "giant mostly complete Patagonian titanosaur weighing over 50 tons (SVP 2016, pg 110)" has been named Patagotitan (Carballido et al. 2017).
- The entry ""Livingston sauropod" from the Late Jurassic of Montana ()" actually refers to reports of Alamosaurus from the Evanston Formation of Wyoming and the Hell Creek Formation of Montana by Lucas & Hunt (1989) and Maxwell et al. (1967).
- The "nearly complete basal eusauropod from Cedar Mountain formation, Utah.  Mention of a new iguanodont and polacanthid (SVP 2016, pg 215)" has been named Mierasaurus by Royo-Torres et al. (2017)
- The entry "Protoichthyosaurus argued to be a valid genus (SVP 2016, pg 185)" should be deleted because Protoichthyosaurus is formally revalidated by Lomax et al. (2017).
- The entry ""Gadolosaurus" hadrosaur from the Bayan Shireh Formation of Baishan Tsav, Mongolia (Mentioned in this paper: Tsogtbaatar, K., D. Weishampel, D. C. Evans, and M. Watabe. (In review). A New Hadrosauroid (Dinosauria: Ornithopoda) from the Late Cretaceous Baynshire Formation of the Gobi Desert (Mongolia). PLOS ONE)" should be renamed "Unnamed hadrosaur from the Bayan Shireh Formation of Baishan Tsav, Mongolia (Averianov et al. 2022)" because "Gadolosaurus" is a Japanese translation of gadrosavr (Russian word for hadrosaur) and was never meant to be a new genus name, and the specimen informally dubbed "Gadolosaurus" has been assigned to Hadrosauroidea by Averianov et al. (2022) as a probable distinct taxon of basal hadrosauroid.

References:
Averianov AO, Lopatin AV, Tsogtbaatar K, and 2022. Taxonomic attribution of a juvenile hadrosauroid dinosaur from the Upper Cretaceous Bayinshire Formation of Mongolia. Doklady Rossijskoj Akademii Nauk. Nauki O Zemle. 503 (1): 26–31. doi:10.31857/S2686739722030033

Carballido, J.L.; Pol, D.; Otero, A.; Cerda, I.A.; Salgado, L.; Garrido, A.C.; Ramezani, J.; Cúneo, N.R.; Krause, J.M., 2017. A new giant titanosaur sheds light on body mass evolution among sauropod dinosaurs. Proceedings of the Royal Society B: Biological Sciences 284 (1860): 20171219. doi:10.1098/rspb.2017.1219. PMC 5563814. PMID 28794222.

Ezcurra, M.D., 2017. A new early coelophysoid neotheropod from the Late Triassic of northwestern Argentina. Ameghiniana 54(5): 506–538. doi:10.5710/AMGH.04.08.2017.3100.

Gallina, P.A.; Apesteguía, S.; Canale, J.I., and Haluza, A., 2019. A new long-spined dinosaur from Patagonia sheds light on sauropod defense system. Scientific Reports 9 (1): 1392. doi:10.1038/s41598-018-37943-3.

Lomax, D.R.; Massare, J.A. and Mistry, R.T. (2017). The taxonomic utility of forefin morphology in Lower Jurassic ichthyosaurs: Protoichthyosaurus and Ichthyosaurus. Journal of Vertebrate Paleontology 37 (5): e1361433. doi:10.1080/02724634.2017.1361433. S2CID 90238537.

Lucas, S. G., and A. P. Hunt. 1989. Alamosaurus and the sauropod hiatus in the Cretaceous of the North American western interior. Pages 75–85 in J. O. Farlow, editor. Paleobiology of the dinosaurs. Geological Society of America, Boulder, Colorado. Special Paper 238.

Malkani, M., 2021. Jurassic-Cretaceous and Cretaceous-Paleogene Transitions and Mesozoic Vertebrates from Pakistan. Open Journal of Geology 11: 275-318.

Maxwell, R. A., J. T. Lonsdale, R. T. Hazzard, and J. A. Wilson. 1967. Geology of Big Bend National Park, Brewster County, Texas [enormous file!]. University of Texas Bureau of Economic Geology Publication 6711.

Royo-Torres, R.; Upchurch, P.; Kirkland, J.I.; DeBlieux, D.D.; Foster, J.R.; Cobos, A.; and Alcalá, L., 2017. Descendants of the Jurassic turiasaurs from Iberia found refuge in the Early Cretaceous of western USA". Scientific Reports 7 (1): 14311. doi:10.1038/s41598-017-14677-2.

Sues and Averianov, 2004. Dinosaurs from the Upper Cretaceous (Turonian) of Dzharakuduk, Kyzylkum Desert, Uzbekistan. Journal of Vertebrate Paleontology 24(3), 51A-52A.

Sues, H.-D., and Averianov, A., 2014. Dromaeosauridae (Dinosauria: Theropoda) from the Bissekty Formation (Upper Cretaceous: Turonian) of Uzbekistan and the phylogenetic position of Itemirus medullaris Kurzanov, 1976. Cretaceous Research 51: 225–240. doi:10.1016/j.cretres.2014.06.007.

Thank you once again for the updates. I've shifted the actually undescribed specimens you mentioned over to the published list. However, I did not move the Malkani taxa, as they were not validly published due to being described without ZooBank registrations and in a journal that is known to be predatory. I'm also a little unsure about the "Livingston Sauropod," which I specifically based off of this specimen from the Museum of the Rockies. Is this now considered to be Alamosaurus too? Please let me know if you find anything else.

The specimen from Livingston shown in the photos you posted comes from the Morrison Formation, and thus has nothing to do with Alamosaurus. According to the Fossil Forum, the Livingston specimen is a probable new diplodocid species, but given the recent erection of Galeamopus for Diplodocus hayi and the fact that Amphicoelias, Supersaurus, and Smitanosaurus are known from one or less than five specimens, the Livingston sauropod might belong to either Supersaurus, MOR 692 or Smitanosaurus, given that cladistic analysis by John Whitlock has recovered Suuwassea (based on a sub-adult specimen), Smitanosaurus, and Kaatedocus as dicraeosaurids.

That said, the following entries may need to be removed from this list:

- "the genus Mosasaurus is over inflated, several species actually belong to Moanasaurus (SVP 2016, pg 232)" = an unpublished thesis by Hallie Street written in 2016 recognizes the species M. conodon, M. mokoroa, and M. prismaticus as constituting new genera and refers Mosasaurus hobetsuensis to Moanasaurus (Link: https://era.library.ualberta.ca/items/53bb82a0-7a66-4afb-a26d-b611b5f86136/view/f59a5ee9-9c57-4409-9988-5c8958216f80/Street_Hallie_P_201604_PhD.pdf); the cladistic analysis of Thalassotitan conducted by Longrich et al. (2022) also confirms that Mosasaurus as currently recognized is polyphyletic
- the entry "- one or more possible new species of possible titanosaurs from the Early Cretaceous Yixian Formation of China (Mentioned in this paper: https://www.sciencedirect.com/science/article/pii/S1871174X0700025X?via%3Dihub)" should be deleted because the somphospondylian titanosauriforms Dongbeititan and Liaoningotitan have described from the Yixian Formation of Liaoning (Wang et al. 2007; Zhou et al. 2018)

Longrich, N.R., Jalil, N.-E., Khaldoune, F., Yazami, O.K., Pereda-Suberbiola, X., and Bardet, N., 2022. Thalassotitan atrox, a giant predatory mosasaurid (Squamata) from the Upper Maastrichtian Phosphates of Morocco. Cretaceous Research: 105315. doi:10.1016/j.cretres.2022.105315. ISSN 0195-6671.

Wang, X.; You, H.; Meng, Q.; Gao, C.; Chang, X., and Liu, J., 2007). Dongbeititan dongi, the first sauropod dinosaur from the Lower Cretaceous Jehol Group of western Liaoning Province, China. Acta Geologica Sinica (English Edition) 81 (6): 911–916. doi:10.1111/j.1755-6724.2007.tb01013.x.

Zhou, C.-F.; Wu, W.-H.; Sekiya, T.; Dong, Z.-M., 2018. A new Titanosauriformes dinosaur from Jehol Biota of western Liaoning, China. Global Geology 37 (2): 327–333. doi:10.3969/j.issn.1004-5589.2018.02.001.