Genus: Nectoporthus validus COPE, 1868
Etymology:

= Nectoporthus validus COPE, 1868
Etymology: Latin, validum, “strong”.
= Mosasaurus validus (COPE, 1868) (nomen vanum)
= Macrosaurus validus COPE, 1868
= Liodon laevis COPE, 1869-1870 (partim)
= Liodon validus COPE, 1869-1870
= Clidastes antivalidus COPE, 1869-1870
= Tylosaurus validus MERRIAM, 1894
= Clidastes validus MILLER, 1955

Holotype: AMNH 1395

Locality: Near Medford, Barnsboro, Gloucester County, New Jersey.

Horizon: Navesink Formation, Monmouth Group.

Biostratigraphy:

Age: Middle Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material: Dorsal vertebrae.

Referred material:

AMNH 1415: Dorsal vertebrae.