Pisanosaurus mertii

Source: http://upload.wikimedia.org/wikipedia/commons/b/b9/Pisanosaurus.jpg

NamePisanosaurus mertii 

Name Meaning: Merti & Mr. Pisano’s lizard

First Described: 1967

Described By: Casamiquela

ClassificationDinosauria, Ornithischia, Pisanosauridae 

My Twelfth Favorite Dinosaur! 

Oh look another basal dinosaur what a surprise. Pisanosaurus is considered to be the basalmost ornithischian, or at least the basalmost one known to date. It lived between 228 and 216.5 million years ago in the Norian age of the Late Triassic period. It was found in the Ischigualasto Formation in Argentina and it was a small, lightweight, bipedal herbivore about 1 meter long. Its classification has been under a lot of debate but the current consensus is that it is the oldest known ornithischian. It is only known from a single skeleton that is known from a partial skull and some teeth, some vertebrae, and other bones including part of the pubis, allowing for its classification. Given the synapomorphic character of protofeather/feather like integuments it probably was covered with them in at least some parts of its body. It lived in a volcanically active floodplain that was covered with forests and was warm and humid, but subject to seasonal rainfalls. It probably ate the vegetation of the area which consisted of ferns, horsetails, and conifers. Its major predator was probably Herrerasaurus, which was the most common predator in the area. Pisanosaurus lived right alongside therapsids, rhynchosaurus, dicynodonts, traversodontids, rauisuchians, archosaurus, Saurosuchus, and Eoraptor as well as Herrerasaurus. Herbivorous dinosaurs such as Pisanosaurus were definitely in the minority. 



Shout out goes to anonbinarywolf!


Had a request for rhynchosaurus and there’s like nothin on tumblr about this little nerd. So here’s the best and worst (in my opinion) depictions of the lil critter that I found on google images.

This was a small rhynchosaur (diapsid reptiles related to the archosaurs), and being 2 feet long one of the smallest known of its group. Footprints believed to belong to Rhynchosaurus- suitably named Rhynchosauroides -have been found in the Alps. It had a semi-erect posture like a crocodile and its hind feet appear to have been adapted for scratching and digging. It had two large teeth at the front of its head, and its skull structure suggests that it had a good sense of smell, but poor hearing.

Imagine a large, reptilian naked mole rat.