† Macrosemiocotzus americanus Gonzalez-Rodriguez, Applegate & Espinosa-Arrubarrena, 2004

Referred specimens.

IGM 8163 (holotype), IGM 8164-IGM 8171 (paratypes).

Locality and age.

Tlayúa quarry, Tlayúa Formation, Tepexi de Rodríguez, Puebla; Cretaceous (Albian).