Notosuchus terrestris, a small, terrestrial relative of modern crocodiles.

Achillesaurus manazzonei, a small theropod dinosaur, possibly insectivorous.

A crayfish, whose fossilized burrows have been found.

Dinilysia patagonica, one of the earliest snakes. Of big size, killed its prey by constriction.

Ant and termite, whose fossilized burrows have been found.

Comahuesuchus brachybuccalis, a small, terrestrial relative of modern crocodiles. Young individual.

Small, early mammal that could have made the spiral burrows found.

Medium sized lizard that could have made the spiral burrows foud.

Velocisaurus unicus, a small, predatory theropod dinosaur.

Three types of fossilized burrows that have been found by the team of palaeontologist students.

Cover of the thesis.