I need advice

[Dinophile]

Hello all,
I am making a diorama with a Deinonychus chasing a pterosaur.  However, my quandary is which genus of pterosaur existed with it.

[Halichoeres]

I'm not aware of any body fossils pterosaurs from the same formations, but there are some trackways, and some roughly contemporary (Aptian/Albian) remains of ornithocheirids and modest-sized azhdarchids elsewhere in North America.

[Dinophile]

Thanks ... that's a great start!

[Loon]

The best I could find is that there are indeterminate remains of a large pterosaur in the Mussentuchit Member of the Cedar Mountain Formation. As Haliocheres said, I would recommend using a azdarchid figure, maybe the recent Safari Quetzalcoatlus, however, it depends on which deinonychus you plan on using.

[Dinophile]

Thank you!  I have bought a Mark Salas Female Nyctosaur resin figure and probably will modify it accordingly.

[Vidusaurus]

Thank you!  I have bought a Mark Salas Female Nyctosaur resin figure and probably will modify it accordingly.

Nyctosaurus probably wouldn't be a good stand-in for anything that could have been contemporaneous for Deinonychus; as mentioned upthread, the only known non-marine pterosaurs from that time would have been basal Azhdarchoids (and besides, I'm reasonably sure that Nyctosaurs aren't known in the fossil record until about 30 million years after Deinonychus at the earliest). Your best bet would be modifying something like the CollectA Hatzegopteryx, as its proportions would have been far more similar than Nyctosaurus' to the pterosaurs likely to have coexisted with Deinonychus.