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avatar_Halichoeres

Fossil sea-urchin from Middle Triassic China

Started by Halichoeres, February 05, 2018, 04:24:52 PM

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Halichoeres

February 05, 2018, 04:24:52 PM Last Edit: November 18, 2019, 11:28:44 PM by Halichoeres
Meet Yunnanechinus luopingensis, a stem-echinoid* from the middle Triassic. Great fossil, and interesting implications for P-T boundary evolutionary dynamics.


Paper (open access): http://rsos.royalsocietypublishing.org/content/5/1/171548?rss=1

*stem-echinoid means that it is more closely related to echinoids (sea urchins and sand dollars) than to any other living group of echinoderms, but that all living echinoids are more closely related to each other than to Yunnanechinus.
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