Genus: Onychosaurus NOPCSA, 1902 (nomen dubium)
Etymology: Greek, onych- (onyx), claw, and Greek, sauros, lizard: Clawed lizard.

Species: hungaricus NOPCSA, 1902 (nomen dubium)
Etymology:

Holotype: Now lost

Locality:

Horizon:

Biostratigraphy:

Age:

Material: 2 individuals with armor of a characteristic type in the caudal region.