If you're taking suggestions then I've got some:
Dinosaurs:
-Miragaia - a long-necked stegosaurid;
-Ichthyovenator - a spinosaurid with a notch in its sail;
-Antarctopelta - a small ankylosaurid with long spikes on its shoulders;
-Sauroposeidon - one of the largest sauropods, pretty well known too;
-Magyarosaurus - a tiny sauropod, not much larger than a cow;
-Rugops - a small abelisaur;
-Thanos - another abelisaur. Not very notable, but it shares the name with a certain space raisin;
Pterosaurs:
-Hatzegopteryx - a well-known Quetzalcoatlus relative;
-Nyctosaurus - a pterosaur with a strange-shaped crest;
-Dsungaripterus - a stout pterosaur with characteristically shaped skull;
-Pterodaustro - a filter-feeding pterosaur with baleen-like teeth;
Mammals:
-Synthetoceras - a protoceratid with a forked horn on its nose;
-Amphicyon - a bear-dog;
-Dinopithecus - a giant baboon;
-Castoroides - a giant beaver;
-Mylodon - a smaller ground sloth;
-Cave hyena - an ice age subspecies of spotted hyena;
-Kubanochoerus - a large hog. Males have a single horn on their foreheads;
Other:
-Longisquama - a lizard-ike creature with elongated scales protruding from its back. NOT AN ANCESTOR OF PTEROSAURS, David Peters is a hack, watch out never to use his artworks as a reference. Mini-rant over, please carry on;
-Sharovipteryx - a lizard-like creature with wings on its legs, how cool is that?
-Palaeobatrachus - just a frog;
-Metriorhynchus - a fully aquatic crocodyliform;
-Mioproteus - a prehistoric olm, probably not living underground;
-Onchopristis - a 10 meter sawfish, possibly preyed upon by Spinosaurus;
-Purlovia - a herbivorous therapsid with large canines. It's in ARK, so it's not like it's completely unrecognizable