Hyrotrioskjan's avatar

Auroranatator schimperi

215 Favourites
30 Comments
6K Views
Again we go further back in time.
Now we are in the late Paleocene somewhere in Argentina. Here the oldest known remains of an natrixosaur were found. And in difference to most other fossil genera which we have, Auroranatator is known from more than one specimen. Scientists actually found a whole bunch of these creatures. Close together there where the remains  of 12, mostly fragmentary but well preserved animals. They got the nickname "the 12 apostle" and are today part of the exhibition at the Instituto de Biología supuestamente ficticia in Buenos Aires (catalog number: IBSF BA 3B 183).
With so much material is was possible to reconstruct the skeleton largely (missing bones are red)

It was speculated that these where the fossils of an nesting colony which was killed because of a storm (they were found in marine sediments) but this hypothesis is highly speculative. (maybe someone would like to make a drawings of such an nesting ground?)

The biggest specimen was not longer than 183,7 cm and the limbs were still capable to bring this animal on land but there are already features, like the form of the nostrils, the salt gland fenestra and more cervical vertebrae than a normal varanoid. 
The teeth were very similar to extant monitor lizards are it's difficult to determine which prey they hunted but most likely it were fish and smaller animals from the shores.
IMAGE DETAILS
Image size
4960x3480px 1.27 MB
Published:
© 2014 - 2020 Hyrotrioskjan
Comments30
anonymous's avatar
Join the community to add your comment. Already a deviant? Log In
Eco727's avatar
Eco727Student Traditional Artist
Aren't there no varanoids in South America? Sorry I know it's fantasy and I'm a huge fan, but how did the varanoids get into South America?
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
There are indeed no land dwelling varanoids in south america today, but these guys were already good swimmers and probably able to reach the southern continent (these are the oldest natrixosaurs we know, but most likely not the most primitive).
Traheripteryx's avatar
TraheripteryxHobbyist General Artist
Die Kralle an den Vorderflossen ist interessant! Rudimentär? Oder zum Festkrallen bei der Paarung?
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Eher rudimänter, aber im Eozän sahen wohl alle Seeschlangen so aus.
Traheripteryx's avatar
TraheripteryxHobbyist General Artist
Stimmt, Phocavaranus hat das ja auch! Ist mir erst nicht aufgefallen!
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Auch die Flussschlangen verfügten über kleine, hufartige Krallen die sie wahrscheinlich zur Fortbewegung im flachen Wasser benutzten =)
Traheripteryx's avatar
TraheripteryxHobbyist General Artist
Hufartig.
Ich sag besser nichts, wegen der
VEEERBINDUNGEN!!! :D
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Ne, das hat jetzt wirklich nichts mit primitiven Walen zutun =)
Traheripteryx's avatar
TraheripteryxHobbyist General Artist
Guuuuut...
Im Falle dessen... Natricinae?
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
In wie fern siehst du da eine Verbindung? (außer der aquatischen Lebensweise?)
View all replies
LTDragoonIII's avatar
I wish I had this pet!
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
=D
YemaYema's avatar
YemaYemaProfessional General Artist
Interesting to hear stuff from Argentina! Love the pattern on this guy.
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Thanks a lot :lol:

Well, I try to think global ;)
alpharaptor6's avatar
alpharaptor6Hobbyist Traditional Artist
what type serpent was the lambton worm?
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Most likely it was a Occidanatator =)
cybershot's avatar
Nice!!!! Clap 
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Thanks =D
Viergacht's avatar
ViergachtProfessional General Artist
I love the detail of the throat wrinkles.
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Thanks =D
I love to draw wrinkly throats.
herofan135's avatar
herofan135Hobbyist Traditional Artist
Looks incredible, love this one!
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Thank you =D
sagittariussigner's avatar
Great and awesome design !
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Many thanks :bow: 
anonymous's avatar
Join the community to add your comment. Already a deviant? Log In