Last week I mentioned the one oddball dinosauriform that had crocodilian-like osteoderm armor, so let's take a look at that one too.
Lewisuchus admixtus lived in what is now northwest Argentina during the late Triassic, around 236-234 million years ago. About 1m long (3'3"), it was an early member of the silesaurids – a group of dinosauriforms that weren't quite dinosaurs themselves, but were very closely related to the earliest true dinosaurs.
(They've also been proposed as instead being early ornithisichians, but we're not getting into that today.)
Much like its later silesaurid relatives Lewisuchus had a long neck and slender limbs, and was probably mainly quadrupedal, possibly with the ability to briefly run bipedally to escape from threats. Its serrated teeth suggest it was carnivorous, likely feeding on both smaller vertebrates and the abundant insects found in the same fossil beds.
Uniquely for an early dinosauriform it also had a single row of bony osteoderms running along its spine. Although it lived at close to the same time as the similarly-armored Mambachiton their last common ancestor was at least 10 million years earlier, and no other early dinosaur precursors with osteoderms are currently known – so this was probably a case of Lewisuchus independently re-evolving the same sort of feature.
—
NixIllustration.com | Tumblr | Patreon
522 notes
·
View notes
Results from the #paleostream!
Ichthyotitan, Vasuki, Dynamosuchus and Quasicaecilia.
227 notes
·
View notes
Tyrannosaurus rex sketches
414 notes
·
View notes
Paleovember 2023, Venetoraptor! A Triassic Archosaur from Brazil that would have climbed trees…and was also an early relative of pterosaurs!
308 notes
·
View notes
NEW POST FOR PALEOSTREAM WAWAWAWA
Sillosuchus taking a nap under a tree near an oasis
Suchomimus hunting some fish
Shuvosaurus siblings exploring the forest undergrowth
Fukuivenator rivals fighting for dominance
I feel like 20 minute intervals is not the best way to develop a new artstyle, but i felt adventurous :3
i referenced some pics of landscapes to help make each one look different cause i am not super great at painting backgrounds X3c
264 notes
·
View notes
Can you please draw some Kaprosuchus??
absolutely!! Kaprosuchus happens to be my favorite prehistoric crocodyliforme. The idea of a long legged mostly land based tusked croc makes me smile I just wanna give it a pat (but safely maybe while its sleeping)
39 notes
·
View notes
Quick chibi of the new guy Rourke Mcgill
40 notes
·
View notes