DeviantArt - Now I understand.

Actually Helicoprion probably looked more like this.


Here's some advice. Some pictures of prehistoric animals you see in search engines are
A. really old and outdated (e.g. swamp brontos and Featherless Dinos)
B. Stills from movies and games which probably means they're made to be over the top and probably don't look like the real animal (JP's dilophosaurus and Dino Crisis' Therizinosaurus)
C. Are from biased, hack, and disgraced scientist or just some weirdo website( e.g. Reptile evolution, Pterosaur heresies and every creationist website ever)
D. All of the above

Imagine having THAT in monster girl form…