Species: primus OLSON, 1939
Etymology:

Holotype: FMNH UR 1565

Locality: West Bank of Brushy Creek, Baylor County, Texas.

Horizon: Arroyo Formation, Lower Clear Fork Group.

Biostratigraphy: Land-vertebrate faunachron lower D.

Age: Middle Leonardian stage, upper Rotliegendes, Early Permian.

Material: Skull and mandible.

Skull after HUTTENLOCKER, PARDO, SMALL & ANDERSON, 2013.

Paratypes:

FM-UR 1566: Skull with 7 vertebrae articulated.

FM-UR 1567: 2 skulls.

FM-UR 1568: Fragmentary skull.

FM-UR 1569: Partial lower jaw.

Referred material:

GREGORY, PEABODY & PRICE, 1956

Locality: Fort Sill, OMNH Locality V51, Dolese Brothers limestone quarry at Richards Spur, Fissure Fills, just west of U.S. Highways 62 & 281, 10.5 miles south of Apache, 6 miles north of Fort Sill, SW 1/2, Sec. 31, T4N, R11W, Comanche County, Oklahoma.

Horizon: Willington Formation (Garber Formation), Summer Group, Arbuckle limestone, (Probably equivalent to the Arroyo Formation of Texas).

Biostratigraphy:

Age: Middle Leonardian stage, upper Rotliegendes Epoch, Early Permian.

Material:

KUVP 9922: Lower jaw.

KUVP 9926: Atlas.

KUVP 9936: Sections of dentary teeth.

YPM 3686, 3864, 3865, 3866: Lower jaws.

YPM 3684: Maxilla.

 

BOLD & DEMAR 1983

Locality: Fort Sill, OMNH Locality V51, Dolese Brothers limestone quarry at Richards Spur, Fissure Fills, just west of U.S. Highways 62 & 281, 10.5 miles south of Apache, 6 miles north of Fort Sill, SW 1/2, Sec. 31, T4N, R11W, Comanche County, Oklahoma.

Horizon: Willington Formation (Garber Formation), Summer Group, Arbuckle limestone, (Probably equivalent to the Arroyo Formation of Texas).

Biostratigraphy:

Age: Middle Leonardian stage, upper Rotliegendes Epoch, Early Permian.

Material:

FM PR 1093-1107, UR 287B and C, UR 1192, 1193, 1194, 1196, 1199, 1200, 1202, 1205, 1208, 1030: Partial skulls and lower jaws.

FM 6062: Transverse serial sections of a fragment of maxilla consisting of 9 slides, sections cut at 1 mm intervals.

FM 6063: Same as 6062.

KU 8968, 55536 to 55551, 8969, 9922, TMMM 40882-40840:

 

= Euryodus cf primus GREGORY, PEABODY & PRICE, 1956

Locality: Fort Sill, Oklahoma.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

MCZ 4353: Maxilla.

MCZ 4354: Palatine.

FM-UR 287: Dentary and atlas.

FM-UR 983: Humerus.

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Species: dalyae CARROLL & GASKILL, 1978
Etymology:

Holotype: FM-UR 2296

Locality: SW 1/4, SE 1/4, SE 1/4, sec. 20, T4S, R15W, 6 1/2 miles southwest of Granfield, Tilman County, Oklahoma.

Horizon: Hennessey Formation, (Arroyo equivalent), Low Clear Fork Group.

Biostratigraphy:

Age: Leonardian Stage, Lower Rotliegendes Epoch, Early Permian.

Material: Skull and lower jaws.

Referred material:

FM-UR 2387: Fragmentary skull, stapes and lower jaw.

FM-UR 2299-2302: Vertebral elements, and ribs.

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Species:? bonneri SCHULTZE & FORMEAN, 1981
Etymology:

Holotype: KU VP47367

Locality: Roadcut on Kansas State Highway 99, 1.5 miles northwest of Eskridge, Wabaunsee County, Kansas.

Horizon: Lower part of Speiser Shale, Council Grove Group.

Biostratigraphy:

Age: Early Permian.

Material: A nearly complete, articulated skull with left lower jaw in place, but the right displaced below the skull, a few vertebrae and a humerus.