Species: columbiensis (WELLES, 1962) CARPENTER, 1999
Etymology:
= Alzadasaurus columbiensis WELLES, 1962
Holotype: UCMP 38349
Locality: Loma de la Catalina, 6 km west of Leiva, About 300 meters north of road from Leiva to Chiquinquira, Boyaca Province, Colombia.
Horizon: Paja Formation.
Biostratigraphy:
Age: Upper Aptian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.
Material: Skull and fine skeleton lacking only distal parts of paddles, ischia, ilia and tail.
Note: Pathological cervicl vertebrae, and a series of pathological vertebral series (Sassoon, 2019).