Genus: Angistorhinus MEHL, 1913
Etymology:

Species: grandis MEHL, 1913
Etymology:

Holotype: FMNH UC 631

Locality: Along the Popo Agie River, between Squaw and Baldwin Creeks, near Lander, Fremont County, Wyoming.

Horizon: Popo Agie Formation.

Biostratigraphy:

Age: Otischalkian, Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material: Skull and most of the dentary, lacking teeth.

Referred material:

LUCAS, HECKERT & KAHLE, 2002

Locality: Locality 9, near Otis Chalk, Howard County, Texas.

Horizon: Colorado City Formation, Chinle Group.

Biostratigraphy:

Age: Otischalkian, Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material:

Number: Not given: Skull, lower jaw, 2 cervical vertebrae, and parts of others, sacrum, pelvis, 12 ribs, 30 gastralia, an incomplete fibula, fragments of other long bones and 32 scutes.

 

= Angistorhinus gracilis MEHL, 1915
Etymology:

Holotype:

Locality: Baldwin Creek, Fremont County, Wyoming.

Horizon: Popo Agie Formation.

Biostratigraphy:

Age: Otischalkian, Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material: Skull and mandible and associated skeletal parts.


= Angistorhinus maximus MEHL, 1928
Etymology:

Holotype: UMMP 531

Locality: Little Popo Agie River, Fremont County, Wyoming.

Horizon: Popo Agie Member, Chugwater Formation.

Biostratigraphy:

Age: Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material: Skull missing the anterior end from the orbit, end of left ramus of mandible.


= Angistorhinus alticephalus STOVALL & WHARTON, 1936
Etymology:

Holotype: OMNH 733

Locality: Roy Lamb Ranch, 256 miles (40 km) southeast of Big Springs, Howard County, Texas.

Horizon: “Pre-Tecovas Horizon”, Dockum Group.

Biostratigraphy:

Age: Middle Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material: Skull, 9 vertebrae, some rib fragments, and about 2 square feet of dermal scutes.
Note: Referred to Angistorhinus megalodon (LONG & MURRY, 1995).

Referred material:

GREGORY, 1962

Locality: Otis Chalk, Howard County, West Texas.

Horizon: Dockum Formation.

Biostratigraphy:

Age: Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material:

UT?: 2 Skulls.

 

LUCAS, HUNT & KAHLE, 1993

Locality: Otis Chalk, Howard County, locality 9, West Texas

Horizon: Dockum Formation.

Biostratigraphy:

Age: Early Tuvalian, Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material:

Number: Not given: Skull and lower jaw and fragmentary skeleton.

 

Locality: Otis Chalk, Howard County, Locality 2, West Texas

Horizon: Dockum Formation.

Biostratigraphy:

Age: Early Tuvalian, Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material:

Number: Not given: Fragmentary skull.

 

= Angistorhinus aeolamnis EATON, 1965
Etymology:

Holotype: KUVP 11659

Locality: Wind River Basin, 23 miles northwest of Lander via U.S. Highway 287 and 11 miles west of Highway 287 on Sage Creek Road, SE 1/4, T1N, R3W, Fremont County, Wyoming.

Horizon: Popo Agie Member, Chugwater Formation.

Biostratigraphy:

Age: Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material: Skull with some of the top missing.

Referred material:

KU 11660: Interorbital skull roof.