Genus: Serpentisuchops PERSONS IV, STREET & KELLEY, 2022
Etymology: Latin, serpent, "snake" and Latin, suchus, "crocodile".
Species: pfisterae PERSONS IV, STREET & KELLEY, 2022
Etymology: In honor of Anna Pfister, the landowner whose generosity afforded the scientific sudy and donation of the type specimen.
Holotype: GPM5001
Locality: Old Woman Anticline, southeastern end of the Powder Basin, Niobrara County, Wyoming.
Horizon: Upper Member, Pierre Shale.
Biostratigraphy:
Age: Lower Maastrichtian, Late Senonian Subepoch, Late Gulf Epoch, Late Cretaceous.
Material:Partial skull, lower jaw, 32 cervical, 4 pectoral, 2 dorsal, 2 sacral, and 18 caudal vertebrae.vertebral column, plus left ilium and pubis.