Genus: Ophiacodon MARSH, 1878
Etymology:
= Arribasaurus WILLISTON, 1914
Etymology:
= Diopaeus COPE, 1892
Etymology:
= Poliosaurus CASE, 1907
Etymology:
= Theropleura COPE, 1878
Etymology:
= Therosaurus HUENE, 1925
Etymology:
= Winfeldia ROMER, 1925
Etymology:

Species: mirus MARSH, 1878
Etymology: Latin, mirus, "wonderful."

Holotype: YP 807

Locality: Baldwin Bonebed, Rio Arriba County, New Mexico.

Horizon: Abo/Cutler Formation, Cutler Group.

Biostratigraphy:

Age: Wolfcampian, Lower Rotliegendes Epoch, Early Permian.

Material: Fragmentary dentary.

Referred material:

FMNH (WM) 671, (WM) 672: Fragmentary skulls and skeletons.

After ROMER & PRICE, 1940

ROMER & PRICE, 1940

Locality:

Horizon:

Biostratigraphy:

Age: Late Pennsylvanian (Late Carboniferous).

Material:

FMNH WM 157: Partial skeleton.

FMNH WM 748: Shoulder girdle.

UM 3054: Femur.

UM 11025: Various isolated bones.

FMNH WM 240-241: 2 small and immature partial skeletons.

 


CASE, WILLISTON & MEHL, 1913

Locality: Miller Bone-bed, about 1/2 mile east of the Baldwin Bone-bed, Rio Arriba County, New Mexico.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

UC 650: Skull and nearly complete skeleton.

UC 652: Pelvis, posterior, dorsal and sacral vertebrae, nearly complete left hind leg and a part of the right one, caudal vertebrae, and various other bones.

 


= Ophiacodon cf. mirus KESSLER & LEHMAN, 2000

KISSLER & LEHMAN, 2000, KISSLER & LEHMAN, 2002

Locality: OMNH locality V1005, Seminole County, Oklahoma.

Horizon: Ada Formation.

Biostratigraphy:

Age: Late Pennsylvanian.

Material:

OMNH 55255, 55256: 2 isloated cervical vertebrae.

OMNH 55254: 5 lumbar vertebrae.

OMNH 55253 : 4 complete lumbar vertebrae.

OMNH 55274, 55275, 55292 : Caudal vertebrae.

OMNH 55252 : 27 articulated caudal vertebrae.

OMNH 55241: Left scapulocoracoid.

OMNH 55200, 55204: Left humerus.

OMNH 55210: Right radius.

OMNH 55216: Left ulna.

OMNH 55243, 55246: Fragmentary pelvic girdle.

OMNH 55235, 55237, 55240, 55234: Right femur.

OMNH 55220, 55224: Right tibiae.

OMNH 55229: Right fibula.

_____________________________________________________________________________________

Species: uniformis (COPE, 1878) ROMER & PRICE, 1940
Etymology:
= Theropleura uniformis COPE, 1878
= Poliosaurus uniformis (COPE, 1878) CASE, 1907

Holotype: Lost after description

Locality: Undefined, Wichita Locality, Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material: Vertebrae.

Neotype: AMNH 4143

Locality: Wichita Locality, Texas.

Horizon: Early Permian.

Material: Fragmentary skull, jaws, 13 vertebrae and limb material.

Referred material:

ROMER & PRICE, 1940

Locality: 1 mile southwest of Archer City, Archer County, Texas.

Horizon: Upper Archer City Formation (formerly Putnam Formation, Wichita Group), upper Bowie Group.

Biostratigraphy: Land-vertebrate faunachron upper A.

Age: Wolfcampanian stage, Lower Rotliegendes Epoch, Early Permian.

Material:

After ROMER & PRICE, 1940

MCZ 1366: A nearly complete skeleton.

MCZ 1413: Partial skeleton.

 


Locality: Found along the Little Wichita below Fulda in eastern Baylor County, Texas.

Horizon: Petrolia Formation (formerly Belle Plains Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron upper B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

MCZ 1443: Tibia.

 

 

Locality: South of Dundee, in northwestern Archer County, Texas.

Horizon: Petrolia Formation (formerly Belle Plains Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron upper B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

MCZ 1295: Femur.

 


Locality: Briar Creek, Western Archer County, Texas.

Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

UM 3423: Pelvis.

FMNH WM 547, WM 130, UM 3361, FMNH WM 3363, WM 249, WM 548, WM 840, MCZ
1291, MCZ 1292, UM 3360: Femora.

UM 3352, FMNH WM 143: Humerii.

UM 3428: Ilium.

LAURIN & BUFFRENIL, 2016

CM VP 9528: Femur.

 

 

 

Locality: Maybelle, Western end Baylor County, Texas.

Horizon: Lower to middle Waggoner Ranch Formation (formerly Clyde Formation, upper Wichita Group) Upper Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower to middle C.

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

Material:

FMNH WM 690: Skeleton in ventral view.

 


Locality: Godwin Creek, in eastern Baylor County, Texas.

Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

Number: Not given:

 

Locality: Rattlesnake Canyon, southeast of Black flat in northwestern Archer County, Texas.

Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

MCZ 1435: Partial skeleton.

MCZ 1297: Femur.

 

 

Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

AMNH 1148: Anterior portion of skull, 13 vertebrae, the first 7, beginning with the atlas, in connected series, limb bones and fragments of atlas.

 


OLSON, 1967

Locality: Waurika Site 1, 6 miles west of Waurika in SW 1/4, NW 1/4, sec. 36. T4S, R9W, Jefferson County, Oklahoma.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

OUSM 4-4-S10: Fragment maxilla.

OUSM 4-40-S10: Parts of several individuals.

 


Material: Perry Site 6, SE 1/4, SE 1/4, Sec. 26, T23N, R2W, Noble County, Oklahoma.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

OUSM 4-1-S8: Fragmentary skull.

OUSM 4-4-S4: Fragmentary jaw.

OUSM 4-7-S18: Several vertebrae, rib and teeth.

 


OLSON, 1970

Locality: Bed 16, northwest of Perry, Logan County, Oklahoma.

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

Biostratigraphy:

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

Material:

Number: Not given:

 

REISZ, 1986

Locality: 1 mile southwest of Archer City, Archer County, Texas.

Horizon: Upper Archer City Formation (formerly Putnam Formation, Wichita Group), upper Bowie Group.

Biostratigraphy: Land-vertebrate faunachron upper A.

Age: Wolfcampanian stage, Lower Rotliegendes Epoch, Early Permian.

Material:

MCZ 1366: Skeleton.

_____________________________________________________________________________________

Species: retroversus (COPE, 1878) ROMER & PRICE, 1940
Etymology:
= Theropleura retroversus COPE, 1878

Holotype: AMNH 4167

Locality: Mount Barry, 10 miles west of Wichita Falls, Wichita County, Texas.

Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material: Vertebra.

From CASE, 1907

From CASE, 1907

Referred material:

ROMER & PRICE, 1940

Locality: Wichita locality unknown, Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

AMNH 1929: Femur.

 


Locality: Near the head of Cottonwood Creek, close to the southern border of Archer County, Texas.

Horizon: Lower Archer City Formation (formerly Moran Formation, Lower Wichita Group), middle Bowie Group.

Biostratigraphy: Land-vertebrate faunachron middle A.

Age: Lower Wolfcampanian stage, Lower Rotilegendes Epoch, Early Permian.

Material:

MCZ 1120: Fragmentary column.

 


Locality: South of Dundee, in northwestern Archer County, Texas.

Horizon: Petrolia Formation (formerly Belle Plains Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron upper B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

FMNH WM 458: Nearly complete mounted skeleton, including feet and nearly complete tail.

MCZ 1470: Nearly complete presacral column.

 


Locality: Rattlesnake Canyon, southeast of Black Flat in Northwestern Archer County, Texas.

Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

MCZ 1299: Femur.

MCZ 1121: Fragmentary skeleton of a juvenile.

MCZ 1203: Jaw, braincase, and much of the limbs and girdles.

MCZ 1103: Fragmentary skeleton.

MCZ 1119, 1484: Fragmentary columns.

MCZ 1560:

MCZ 1200, 1294: Atlas centra.

MCZ 1562: Scapulocoracoid.

MCZ 1486: Humerus.

MCZ 1450, 1296: Pelvic girdle elements.

MCZ 1205, 1206: Femora.

MCZ 1298: Fibula.

 

 

Locality: A bone pocket 1 mile southwest of Archer City, Archer County, Texas.

Horizon: Upper Archer City Formation (formerly Putnam Formation, Wichita Group), upper Bowie Group.

Biostratigraphy: Land-vertebrate faunachron upper A.

Age: Wolfcampanian stage, Lower Rotliegendes Epoch, Early Permian.

Material:

MCZ 1426: Fragmentary skeleton.

 

 

Locality: Eastern Baylor County, north of Fulda, Texas.

Horizon: Lower to middle Waggoner Ranch Formation (formerly Clyde Formation, upper Wichita Group) Upper Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower to middle C.

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

Material:

MCZ 1204: Fragmentary skeleton.

 


Locality: Godwin Creek, in eastern Baylor County, Texas.

Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

FMNH WM 459: Fragmentary skeleton.

AMNH 4620: Fragmentary column.

MCZ 1561:

FMNH WM 9:

MCZ 1451:

AMNH 4826: Fibula.

 

 

Locality: Along the Middle Fork of the Little Wichita west of Archer City, Texas.

Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

AMNH 4106 (partim): Fragmentary remains.

 


Locality: Geraldine, Texas.

Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

AMNH 4195: Fragmentary remains.

 


Locality: Tit Mountian, just northeast of Dundee, Archer County, Texas.

Horizon: Petrolia Formation (formerly Belle Plains Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron upper B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

AMNH 4195 (partim):

AMNH 4566: Pelvic girdle elements.

 


Locality: Mount Barry, Wichita County, Texas.

Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

AMNH 4007: Part of the type of Secodontosaurus obtusidens.

AMNH 4026 (partim):

 


Locality: Little Wichita below Fulda in Eastern Baylor County, Texas.

Horizon: Petrolia Formation (formerly Belle Plains Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron upper B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

AMNH 4807:

FMNH WM 709, AMNH 4711: Fragmentary columns.

FMNH WM 790: Femur.

 

 

Locality: Three Forks of the Little Wichita, northwest of Archer City, Texas.

Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

AMNH 4377 (partim): Fragmentary remains.

 


Locality: Unknown.

Horizon: Petrolia Formation (formerly Belle Plains Formation, middle Wichita Group), Lower Wichita Group or Lowermost Petrolia Formation (formerly Upper Admiral Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower to upper B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

AMNH 4141:

AMNH 4142, 4132: Fragmentary columns.

 


Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

AMNH 1111: Several isolated vertebrae.

 


Locality: South of Dundee, Archer County, Texas.

Horizon: Petrolia Formation (formerly Belle Plains Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron upper B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material:

After ROMER & PRICE, 1940.

FMNH (WM) 458: Skull and skeleton.

 

ZIDEK, JOHNSON, MAY & CLABORN, 2004

Locality: OMNH V 173, Northeast Frederic site of Simpson, (1976, 1979), Tillman County, Oklahoma.

Horizon: Garber Sandstone, Upper part of the Sumner Group, possibly equivalent to the Lower Arroyo Formation, Lower Clear Fork Group.

Biostratigraphy: Land-vertebrate faunachron lower D.

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

Material:

Number: Not given:

 


= Theropleura trianagulata COPE, 1878
Etymology:

Holotype: AMNH 1107

Locality: Unknown.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material: A single vertebrae, in a lot of 5 or 6.

 


= Clepsydrops leptocephalus COPE, 1884
Etymology:
= Diopeus leptocephalus (COPE, 1884) COPE, 1884

Holotype: AMNH 4155

Locality: The "Big Wichita" locality of Cummings was northwest of Dundee near the Archer-Baylor line, Texas.

Horizon: Petrolia Formation (formerly Belle Plains Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron upper B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material: Fragmentary skull, nearly complete vertebral column pelvis, both femora and tibia.

 


= Therosaurus watsoni HUENE, 1925
Etymology:

Holotype: AMNH 4604

Locality: Along the Little Wichita below Fulda in eastern Baylor County, principally south of the river and in the triangular area between the river and Godwin Creek, Texas.

Horizon: Petrolia Formation (formerly Belle Plains Formation, middle Wichita Group), Lower Wichita Group.

Biostratigraphy: Land-vertebrate faunachron upper B.

Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.

Material: Posterior portion of skull.

_____________________________________________________________________________________

Species: navajovicus (CASE, 1907) ROMER & PRICE, 1940
Etymology:
= Dimetrodon navajovicus CASE, 1907
= Arribasaurus navajovicus (CASE, 1907) WILLISTON, 1914
= “Clepsydropsnatalis
Etymology:

Holotype: AMNH 4777

Locality: El Cobre, north of Abiquiu, Rio Arriba County, New Mexico.

Horizon: Abo/Cutler Formation, Cutler Group.

Biostratigraphy:

Age: Wolfcampian, Lower Rotliegendes Epoch, Early Permian.

Material: Postcranial elements.

Referred material:

AMNH 2298 & 2299: Humerus, and other bones.

AMNH 2285: Fragmentary skeleton.

AMNH 4781:

AMNH 4783:

AMNH 4784:

AMNH 4799:

AMNH 4776(2292, not 2290): Front foot.

YP 1383: A large amount of isolated bones representing a number of individuals, mostly immature.

MCZ 1595: Fragmentary pelvis.

FMNH WM 1101:

FMNH WM 1013:

FMNH WM 1014:

FMNH WM 1034:

FMNH WM 1046:

 

HARRIS, LUCAS, & SPIELMANN, 2010

Locality: NMMNH Locality 5660, section 25, T24N, R6E, Rio Arriba County, New Mexico.

Horizon: El Cobre Canyon Formation, Cutler Group.

Biostratigraphy:

Age: Cobrean, Gzelian Epoch, Early Late Pennsylvanian.

Material:

NMMNH P-43121: Fragmentary skeleton.

 

= Ophiacodon cf. O. navajovicus VAUGHN, 1962

Locality: “Platyhystrix pocket”, Lime Creek Valley and near John's Canyon, NE 1/4, sec. 21. T. 41 S. R. 19E., San Juan County, Utah.

Horizon: Halgaito Shale, equivalent of Lower Cutler Formation.

Biostratigraphy:

Age: Virgilian, upper Stephanian, Upper Silesian Series, Gzelian Epoch, Late Pennsylvanian (Late Carboniferous).

Material:

Number: Not given:

_____________________________________________________________________________________

Species: hilli (ROMER, 1925) ROMER & PRICE, 1940
Etymology:
= Winfeldia hilli ROMER, 1925

Holotype: Walker Museum 454

Locality: The Walnut River a short distance from Winfield, Wildcat Canyon, Cowley County, Kansas.

Horizon: Fort Riley Limestone, Chase Group.

Biostratigraphy:

Age: Early Permian.

Material: Fragmentary skull and fragmentary skeleton.
_____________________________________________________________________________________

Species: major ROMER & PRICE, 1940
Etymology:

Holotype: AMNH 4109

Locality: North of Maybelle, Baylor County, Texas.

Horizon: Lower to middle Waggoner Ranch Formation (formerly Clyde Formation, upper Wichita Group) Upper Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower to middle C.

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

Material: 10 vertebrae.

Referred material:

AMNH 4083: Femur, pelvis and several vertebrae.

 

OLSON, 1941

Locality: Under the scarp of the Lueders limestone about 1/2 mile east of the road between Mabelle and Vernon, and about a mile south of the bridge over Big Wichita River in Baylor County, Texas.

Horizon: Lower to middle Waggoner Ranch Formation (formerly Clyde Formation, upper Wichita Group) Upper Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower to middle C.

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

Material:

FMNH: Fragmentary skull, dentary, a nearly complete column, pelvis, and ribs.

 


Locality: Deep Red Run Locality, Cummins' Site, Cotton County, Oklahoma.

Horizon: ?Lower to middle Waggoner Ranch Formation (formerly Clyde Formation, upper Wichita Group) Upper Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower to middle C.

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

Material:

AMNH 1814: Femora.

 


ROMER & PRICE, 1940

Locality: Military Trial, Baylor County, Texas.

Horizon: Equivalent to the Lower to middle Waggoner Ranch Formation (formerly Clyde Formation, upper Wichita Group) Upper Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower to middle C.

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

Material:

AMNH unnumbered: Ilium.

 

 

Locality: "Elm Creek", Archer County, Texas.

Horizon: ?Lower to middle Waggoner Ranch Formation (formerly Clyde Formation, upper Wichita Group) Upper Wichita Group.

Biostratigraphy: Land-vertebrate faunachron lower to middle C.

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

Material:

AMNH 4056: Mixed bones, including large ilium and vertebrae.

_____________________________________________________________________________________

Species: beckiae WILSON, 1989 (nomen vanum)
Etymology:

Holotype:

Locality: Garnett, Anderson County, Kansas.

Horizon:

Biostratigraphy:

Age: Late Pennsylvanian (Late Carboniferous).

Material: 3 semi-articulated skeletons, and numerous isolated elements.