Species: pachymandibularis LILLEGRAVEN, 1976
Etymology:

Holotype: LACM 42633

Locality: LACM loc. 3302, Baja California State, Mexico.

Horizon: Middle of the “EL Gallo Formation”, Middle one-third of the Upper Campanian.

Biostratigraphy:

Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Right mandible with posterior accessory cusp of p3, trigonid of p4, complete m1-2, and trigonid of m3.

Referred material:

LACM 42635: Talonid of molar.

Locality: LAV-7172, Near El Rosario, Baja California State, Mexico.

Horizon: “EL Gallo Formation”, Middle one-third of the Upper Campanian.

Biostratigraphy:

Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

LACM 27599: m2.

LACM 27600: Mandibular fragment with talonid of m1.

 

CLEMENS, 1980

Locality: LACM loc 3310, Baja California State, Mexico.

Horizon: “EL Gallo Formation”, Middle one-third of the Upper Campanian.

Biostratigraphy:

Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

LACM 119327: A fragment of a right dentary containing the unerupted, posterior molariform teeth.

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Species: agujaensis CIFELLI, 1994
Etymology: Named for the Late Cretaceous Aguja Formation of southern Texas, from which the type hypodigm specimens were collected.
= Species: Nova CIFELLI, 1990

Holotype: OMNH 22788

Locality: Terlingua local fauna, OMNH V58 (TMM 43057), 8 km NNE Study Butte, Brewster County, Big Bend of the Rio Grande, Texas.

Horizon: Basal upper shale member, Aguja Formation.

Biostratigraphy:

Age: Judithian Age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Fragment of left mandibular ramus with one molar m1 or 2.

Hypodigum:

OMNH 22792: Right mx, with protoconid broken.

OMNH 25268: Trigonid of right mx.

OMNH 22793, 25111: Trigonid of left mx.

OMNH 25269: Talonid of right Mx.

OMNH 25108-9: Lingual halves of right Mx.

OMNH 25218: Right ultimate upper molar, presumably M3, lacking the protocone.