Middle Albian, Early Cretaceous [details]
late Albian to early Cenomanian [details]
Santonian ?, Late Cretaceous [details]
late Albian [details]
Lágrima Formation [details]
Georgetown Fm. and Aurora Fm. [details]
Sierra de la Ranchera, Chihuahua, Mexico [details]
Cerro de Muleros, Chihuahua, Mexico [details]
Cerro de Las Conchas, Arivechi, Sonora, Mexico [details]
HT: IGMUC 2257; PT: IGMUC 2254-2256# [details]
HT: IGMUC 2280 [details]