Genus: Longosaurus WELLES, 1984 (nomen dubium)
Etymology: In honor of Robert A. Long, an American paleontologist who independently recognized the distinctiveness of this taxon.

Species: longicollis WELLES, 1984 (nomen dubium)
Etymology: Latin, longi, "long" and Latin, collum, "neck."

Holotype: AMNH 2705

Locality: New Mexico.

Horizon:

Biostratigraphy:

Age: Late Carnian-Early Norian Stage, Late Triassic Epoch, Late Triassic.

Material: A partial right ilium.