A relatively old drawing, still from August 2011, which shows a Protosphargis in the middle of a group of Caproberyx and if you look carefully you can even spot the sillhouette of a shark in the upperleft corner. The image is unfortunately, due to its small size, a little pixellated. I'm, rather than with other old pictues, relatively pleased with this one.
Protosphargis is an ancient leatherbackturtle and closely related to the extant species. It was probably a little smaller, but for the rest very similar. I assume it too had the ridges, which are classic for the leatherback, which make it much more streamlined and faster than other turtles. As it lived in the Late-Cretaceous it might have needed to flee from mosasaurs and maybe large polycotylids, although no polycotylids have been found near the site where Protosphargis was uncovered, Verona, Italy. Plenty of both large and small mosasaurs have been found in Maastrichtian Europe, though. I'm not sure actually if protostegids too had those ridges. They might... It's funny to seen that there have no protostegids been found in Late-Cretaceous Europe, which is probably why primitive leatherbacks and other non-protostegid seaturtles such as Allopleuron and Glyptochelone were so abundant.
The yellow fish are Caproberyx, extinct relatives of squirrelfishes. As they have been found in many places, I assume they can be found in Maastrichtian Italy as well. I was not large, around 10-20 centimeters. I thought it survived the KT-extinction, but since I just see Wikipidia says it didn't I'm not so sure any more. I don't know exactly which species of shark is featured in the drawing, but I think it was something like Squalicorax, which is extremely commonly found in European strata from the Maastrichtian, so...
Comments, feedback, requests, ideas for other drawings, you name it, are always welcome. Now, I'll be searching for some other good drawing to upload in the future or maybe make a new one, so I hope you enjoy this one and regards!
P.S. First Protosphargis in DA!!!