Remains have been found from Corrales del Vino in Zamora, Spain, and are middle Eocene in age (about 40 million years old).

Duerosuchus is known from a single skull that is incomplete but otherwise well preserved, as well as a lower jaw, some osteoderms, and possibly some vertebrae.

[3] The type species is D. piscator, named in reference to its presumed ability to catch fish, inferred from the shape of its teeth.

There is a notch in the premaxilla to accommodate the fourth mandibular tooth of the lower jaw.

[1] In addition to Duerosuchus, three other Eocene crocodyliforms are known from Corrales: the sebecian Iberosuchus and the crocodilians Asiatosuchus and Diplocynodon.