Genus: Thalassomeodon WELLES, 1943
Etymology: Greek, thalassa, “sea”, and Greek, medon, “lord, ruler”: Sea lord.


Species: haningtoni WELLES, 1943
Etymology:

Referred material:

CARPENTER, 1999

Locality: Seward County, Nebraska.

Horizon: Graneros shale.

Biostratigraphy:

Age: Lower Cenomanian Stage, Upper Middle Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.

Material:

USNM 50132: Fragmentary specimen.
Note: Cephalopods and gastroliths found in the stomach region (CICIMURRI & EVERHART, 2001).