Species: congrops (COPE, 1870) RUSSELL, 1967 (nomen vanum)
Etymology:
= Liodon congrops COPE, 1870 (nomen vanum)
= Tylosaurus congrops (COPE, 1870) HAY, 1902 (nomen vanum)

Holotype:

Locality: Alabama.

Horizon: Selma Chalk Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material: A cervical vertebra.