Hispanochampsa muelleri is a small crocodile found only in the northeast of the Iberian Peninsula. The largest specimens known to date did not exceed a meter and a half in length. His body was covered by thick skin armour. Its habitat was fresh or slightly brackish water lakes and lagoons in what is now the Ebro basin.

Current crocodiles are large predatory animals (up to 5 m in length), with aquatic habits, covered by scales and bony plates called osteoderms, which inhabit tropical and subtropical areas. However, the fossil record offers a different view of these reptiles, which could present a great diversity of forms, some very different from the current ones.

A recent review of this species proposes its assignment to the genus Diplocynodon, which includes animals very similar to the modern alligator provided with an armour of osteoderms that covers the neck, back, belly, and tail. As regards their diet, it most likely consisted of fish and small land animals.