Deviation Actions

paleosir's avatar

Smilosuchus gregorii schematic

Published:
By
26 Comments
3K Views
Eddie infected me with phytosaur interest.

This is based on AMNH 3060, the largest Smilosuchus gregorii specimen known, which has a very nice uncrushed and complete skull but less complete postcrania. Only one phytosaur specimen has a longer skull, a scaled ~1.5 m Parasuchus which was much more gracile. 
Smilosuchus gregorii has some skeletal traits such as a straight and robust femur and slightly modified hip that indicates it was more terrestrial than ´normal´ phytosaurs, though less so than the smaller Nicrosaurus. Given that these traits are also present in Spinosaurus while we consider Spinosaurus quite aquatic I´d be cautious with calling it a terrestrial predator, but it probably was a competent semi-aquatic predator perfectly capable of killing large prey on land.
Given that phytosaurs appear to have had stronger bite forces than crocodiles at the same skull length it must have been a fearsome predator.

The specimen was found with a patch of tile-like armor plating in the throat area, The extent and shape of the complete armor section there is unknown, though it does indicate they had well defended necks with bony armor. 

It should be noted that when reconstructing phytosaurs I advise against giving Smilosuchus a crocodile-like skull texture. It and similar phytosaurs (Pseudopalatus, Brachysuchus and co.) have a fairly smooth bone texture on the majority of the skull and does not resemble the texture crocodylians have (some more basal, more aquatic phytosaurs do have that texture however). I´d go for scaly skin but lipless, or maybe a texture like what juvenile alligators have on their face.

Unlike some circulating estimates ranging from 9 to a whopping 12 meters for the largest phytosaurs, this schematic only comes out as a little bit over 7 m. 

Credit for :iconscotthartman: ´s Paleorhinus for the basis of the postcrania - this is a placeholder for when I gather enough will to make a good schematic using much more postcrania of other Smilosuchus specimens and closely related taxa, which will take a lot more cross scaling and shit so in the meantime this is a fine placeholder.

Refs:
www.skeletaldrawing.com/non-di…

drive.google.com/file/d/1TeB4V…

www.researchgate.net/profile/J…
Image details
Image size
4488x1148px 654.24 KB
© 2019 - 2021 paleosir
Comments26
Join the community to add your comment. Already a deviant? Log In
zeSmollestBirb's avatar
What's that patch in the neck area? Is it a preserved skin patch, or...?
paleosir's avatar
It is not preserved skin, it is a piece of bony throat armor composed of fused tiles forming a curved basket-like shield for the neck area.
zeSmollestBirb's avatar
Ah, thanks for clearing that up!
Phytosaurs outbite crocs?!
paleosir's avatar
Yeah they seem to have higher estimated bite forces indeed.
paleosir's avatar
paleosir's avatar
Cease your existence and commit scooter ankle.
CandyDragon545's avatar

Spam bots are a colossal pain in the ass, I'm very sorry you have to deal with them. Also, "commit scooter ankle" made me laugh! XD

vasix's avatar
Well RIP I guess. Another hard downsize and much less tail eh? And where does the giant Parasuchus come from? Sorry, lots of uni work, Discord got distracting lol
paleosir's avatar
The tail here is mostly unmodified from Hartman´s Paleorhinus. It may very well end up with a larger tail if I make a more rigorous schematic using all closer relatives (if there´s enough data for that).
The giant Parasuchus is from this paper books.google.nl/books?hl=nl&lr…
vasix's avatar
Ah yes the huge Popo Agie specimen. I for one welcome our new giant Smilosuchus overlord!
hannahelizabethh's avatar
Interesting big extinct crock thing there :)
TheDinoDrawer66's avatar
This is pretty neat!
TheDinoDrawer66's avatar
No probs. I actually saw the specimen about a month ago.
PrimordialProse's avatar
Dinogeek2207's avatar
This the largest phytosaur?
paleosir's avatar
Tied with a giant Parasuchus sp. 
Dromaeus's avatar
Join the community to add your comment. Already a deviant? Log In