A piece I originally did for the Saurian artbook.
It wasnt accepted, because despite its high resemblence of a snapping turtle, it got recently suggested that it may have been a full on land-turtle.

Basilemys observing its potential prey in a shallow riverbed.
All animals visible here lived during the cretacious period and have been found in the hell creek formation.

Basilemys (turtle)
Barbourula (frog)
Belonostomus (fish)
Pleurobema (mussels)