Material
The first remains of Erpetosuchus were found in the Lossie Mouth Sandstone Formation in Scotland, dating back to the late Carnian stage of the Late Triassic. The holotype specimen is BMNH R3139 and consists of a skull and a partial postcranial skeleton.
During a field trip in 1995 to the lower part of the New Haven Formation in Connecticut, American palaeontologist Paul E. Olsen discovered a partial skull that, after preparation and description in 2000 (Olsen et al. 2000), was referable to Erpetosuchus. This was the first record of Erpetosuchus outside of Scotland. The specimen has been given the number AMNH 29300, and besides the right side of the skull, also has some vertebrae and indeterminate bones associated. Dating of the lower portion of the New Haven Formation indicates a Norian age.
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