Tethysaurus nopscai (Bardet et al. 2003) is a mosasaur of the Early Turonian (Late Cretaceous) from Morocco. Wiki puts its length at about 10 feet (3 meters), but the skull here is less than a foot long. I haven’t seen a complete specimen yet.
Haven’t seen the limbs either.
I’m not able to make out limbs in the specimens I’ve seen (Fig. 2). Other mosasaurs have large paddles, but Aigialosaurus, a closer relative, has relatively smaller paddles.
The large reptile tree nests Tethysaurus with Aigialosaurus and both with Varanus, distinct from Adriosaurus and the origin of most snakes and Lanthanotus and the origin of pipe snakes. So the small forelimbs appear by convergence with pre-snakes.
Seems like one to several Tethysaurus specimens are known from the private market (Fig. 2). That doesn’t matter to me. I’d like to see more data on the tail and hind limb if possible.
Thanks to Chris Collinson for alerting me to the mistake I had made earlier based on a mislabeled metriorhynchid crocodilomorph (deleted now). The lateral and dorsal views I reconstructed were based on the skull presented by Bardet et al. (2003).
As always, I encourage readers to see specimens, make observations and come to your own conclusions. Test. Test. And test again.
Evidence and support in the form of nexus, pdf and jpeg files will be sent to all who request additional data.
Bardet N, Pereda Suberbiola X and Jalil N-E 2003. A new mosasauroid (Squamata) from the Late Cretaceous (Turonian) of Morocco. Comptes Rendus Palevol 2:607-616.