Species: insignis COPE, 1878
Etymology:
Holotype: AMNH 4565
Locality: Locality unknown?, "Wichita Basin', Texas.
Horizon: Nocona or Petrolia Formation, Wichita Group.
Biostratigraphy:
Age: Lower Permian.
Material: A partial skeleton including a palatine, a parasphenoid and occiput, vertebrae, a scapula and a humerus.
WILLISTON,
Paratype: AMNH 4557
Locality: Corn Hill (originally called Tit Mountain), Archer County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material: Skull with no parasphenoid.
Referred material:
AMNH 4558: Partial mandible.
CASE, 1935
Locality: A few miles south and east of Dundee, Archer County, Texas.
Horizon:
Biostratigraphy:
Age: Early Permian.
Material:
15594, 16009A, 16004, 16005, 16009B, 16009C, 16009D: Skulls and fragmentary skeletons.
plus 9 more skulls and fragmentary skeletons.
HUENE, 1913
Locality: Slippery Creek, Wichita Basin, Archer County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
AMNH 4570: Skull and dentary missing tip of snout.
MAY & HALL, 2016
Locality: Billings 4, SNOMNH site, Nobel County, Northern Oklahoma.
Horizon: Midco Member, Willington Formation.
Biostratigraphy:
Age: Leonardian Stage, Lower Rotliegendes Epoch, Early Permian.
Material:
Number: Not given.
OLSON, 1967
Locality: Mc Cann Quarry Site, the quarry is on Deer Creek, 8 miles west and 4 miles south of Blackwell (about 9 miles southwest in a direct line) and 2.5 miles northeast of Eddy, NE 1/4, sec. 16 and SW 1/4, sec. 9, T26N, R2W, in Kay 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:
OUSM 2-1-S11: Well-preserved skull.
OUSM 2-1-S15: Clavicle.
OUSM 2-1-S16: Jaw.
OUSM 2-1-S23: Large lower jaw.
OUSM 2-1-S24: Lower jaw.
OUSM 2-1-S25: Fragmentary skull, lower jaw, clavicle and scrap.
OUSM 2-1-S26: Miscellaneous fragments.
OUSM 2-1-S28: Well-preserved half skull.
OUSM 2-34-S1: Girdle fragment.
Locality: Pond Creek Site, NE 1/4, NW 1/4, sec. 14, T25N, R5W, about 5 miles east of the village of Pond Creek, Grant 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:
OUSM 2-6-S3: Intercentrum and palatal tooth.
MILNER & SCHOCH, 2013
Locality: Rattlesnake Canyon, ARcher County, Texas.
Horizon: Nocona Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron lower B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 1167: Skull fragments, right cheek and quadrate.
MCZ 1169: Palate and occipit.
MCZ 1508: Slab with skulls.
MCZ 8118: Clavicle.
MCZ 8128: Cheek,
MCZ 8139: Cheek.
MCZ 8151: Premaxilla.
MCZ 8204: Block with two skulls.
Locality: East side of Godwin Creek near mouth, J. J. Lang A-833, Archer County, Texas.
Horizon: Nocona Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron lower B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 6663: Left mandible fragment.
Locality: 3 miles south of Black Flat, Hooper and Wade Survey A-689, Archer County, Texas.
Horizon: Nocona Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron lower B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 8548: Clavicle.
Locality:Near Dundee, Archer County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
FMNH UC230: Skull and postcranium.
Locality: Slippery Creek, Archer County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 1168: Skull fragments.
Locality: Locality A-264, Archer County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
UCMP 27166: Scapuloracoid.
Locality: Parkey Ranch, Slippery Creek, Dundee, Archer County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
USNM 328103: Skull.
Locality: Main Pocket, Hay Camp, Archer County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
USNM 406387: Skull roof.
Locality: West of Charles Williams Ranch, Gibbs Survey A-566, Baylor County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 1546: 3 snouts.
Locality: Wolf Creek (Red Holow),2 miles NW Boone House, H. T. and B. Survey, Sect. 11, A-160, Baylor County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 2378: SKull.
Locality: West of Charles Williams Ranch, J. Gibbs Survey A-566, N side of North Folk, Little Wichitia River, below Fulda, Baylor County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 2387: Skull.
Locality: Tit Mountain, Palo Pinot county, School Land, NE of Dundee, Archer County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 8208: Fragments including a mandible.
MCZ 8215: Clavicle.
MCZ 8261: Skull table.
Locality: Near Redham, Baylor County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 8298: Right mandible.
Locality: North side of North Folk, Little Wichita Below Fulda, J. Gibbs Survey A-566, Baylor County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 8493: Mandible.
Locality: No locality data, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 8538: Scapulocorid.
Locality: South side of North Fork, Little Wichita River, below Fulda, T and NO Railway survey, Baylor, County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
MCZ 8598: Check fragment.
Locality: Locality V 5217, Thrift County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material:
UCMP 105126: Palate and pectoral girdle.
UCMP 105146: Posterior table with hyoid elements.
UCMP 105165: Partial palate.
UCMP 105175, 142027: Complete skulls.
UCMP 105224: Part of right palate.
UCMP 105239: Anterior part of skull.
UCMP 105260: Part of left mandible.
UCMP 154146: Posterior palate.
UCMP 154434: Specimen showing ceratobranchials.
OLSON, 1979
Locality: Patterson ranch in the SW 1/4, sec 436 of the King Survey, Taylor County, Texas.
Horizon: Vale Formation, Middle Clear Fork Group.
Biostratigraphy: Land-vertebrate faunachron lower to middle D.
Age: Upper Leonardian Stage,Upper Rotliegendes Epoch, Early Permian.
Material:
UCLA VP 463: Skull and nearly complete skeleton.
UCLA VP 466, 468: Fragmentary skulls and fragmentary skeleton.
UCLA VP 469: Fragments.
Plus 3 other specimens.
SANDER, 1989
Locality: Loftin Bonebed, 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:
Number: Not given: Intercentra.
Locality: Rattlesnake Canyon Bonebed 2, 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:
Number: Not given: Teeth and dermal bone.
WITZMAN, 2007
Locality: Baylor County, Texas.
Horizon: 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:
MCZ 1080: Pectoral girdle, vertebrae dorsal and gastral scales.
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:
OUSM 10111: Humeri.
OUSM 10114: Femora.
OUSM 10115: Ilia.
OUSM 10118: Articulars.
Locality: OMNH V 247, Lake Frederick site, 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:
= Trimerorhachis cf. insignis DALY, 1973
Locality: SW1/4, SE1/4, SE1/4, sec. 20, T4S, R15W, 6 1/2 miles southwest of Grandfield, Tilman County, Oklahoma.
Horizon: Hennessey Formation, (Arroyo equivalent), Low Clear Fork Group.
Biostratigraphy:
Age: Leonardian Stage, Lower Rotliegendes Epoch, Early Permian.
Material:
FM UR2383: Fragmentary pectoral girdle.
FM UR2271: Fragmentary left muzzle.
FM UR2272: Fragmentary right half-muzzle.
FM UR2384: 3 small sculptured pieces.
OLSON, 1970
Locality: Bed 18 and 19, about 9 miles northeast of Perry, Logan County, Oklahoma, SE 1/4, SE 1/4, sec. 26, T23N, R2W.
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.
Locality: Bed 16, about 9 miles northeast of Perry, Logan County, Oklahoma, SE 1/4, SE 1/4, sec. 26, T23N, R2W.
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.
= Trimerorhachis bilobatus COPE, 1883
Etymology:Holotype: AMNH 4562
Locality: Corn Hill (originally called Tit Mountain), Archer County, Texas.
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material: Partial mandible.
= Trimerorhachis alleni CASE, 1910
Etymology:Holotype: AMNH 4577
Locality: Rattlesnake Canyon, Archer County, Texas.
Horizon: Nocona Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron lower B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material: 4 dorsal vertebrae.
= Trimerorhachis medius BROOM, 1913
Etymology:Holotype: AMNH 4895
Locality: North side, Little Wichita River, Archer County, Texas
Horizon: Petrolia Formation, Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material: Fragmentary skull.
_____________________________________________________________________________________
Species: mesops COPE, 1896
Etymology:
Holotype: AMNH 4568
Locality: West Coffee 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: Fragmentary skull and vertebrae.
Referred material:
MCZ 1165: Skull.
MCZ 8726: Left cheek.
Localtiy: 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:
AMNH 4591: Skull.
Locality: Indian 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:
FMNH C688: Skull.
Locality:Indian 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:
FMNH UC 689: Skull.
Locality: Coffee 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:
GPIT 1800: Skull.
Locality: Branch West, Coffee 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:
USNM 17049: Skull and partial skeleton.
Localtyi: H and TC Railroad Survey, Block 4, Section 7, near Grayback, Willbarger County, Texas.
Horizon: Middle Waggoner Ranch Formation.
Biostratigraphy:
Age: Early Permian.
Material:
MCZ 3221: Skull.
_____________________________________________________________________________________
Species: rogersi OLSON, 1955
Etymology:
Holotype: FMNH UR138
Locality: Pipe Site, Locality FA, Foard County, Texas.
Horizon: Choza Formation, Middle Clear Fork Group.
Biostratigraphy:
Age: Early Permian.
Material: Partial skull and postcranial elements.
Referred material:
FMNH UR73: Long slender mandible.
FMNH UR74: Skull and jaws.
_____________________________________________________________________________________
Species: sandovalensis BERMAN & REISZ, 1980
Etymology:
Holotype: CM 38025
Locality: On west side of Canyon de San Diego, west of State Highway 4 and along western edge of Jemez River, about 11.5 km south of Jemez= Springs, approximately lat 35'40"N and Long 106'45"W, Sandoval County, New Mexico.
Horizon: Cutler Formation, (originally listed as Lower part of the Abo Formation.)
Biostratigraphy:
Age: Wolfcampian Stage, Lower Rotliegendes Epoch, Early Permian.
Material: Fragmentary skull, dentaires and fragmentary skeleton.
Referred material:
= Trimerorhachis cf. T. sandovalensis CANTRELL, SUAZO, BERMAN, SPIELMANN, LUCAS, HENRICI & RINEHART, 2013
Locality: Gallina Wash locality (NMMNH locality 4668, CM locality 1057), Joyita Hills region, approximately 20 km northeast of Socorro, central Socorro County, New Mexico.
Horizon: Scholle Member, Lower Abo Formation.
Biostratigraphy:
Age: Middle Wolfcampian State (Coyotean or Seymouran age), Lower Rotliegendes Epoch, Early Permian.
Material:
CM 38008, CM38010: Partial skulls.
_____________________________________________________________________________________
Species: greggi MILNER & SCHOCH, 2013
Etymology: In honor of Mr Donald Gregg of Seymour, Texas, who not only collected
the type specimen, but faciliated several productive excavations by the USNM
in the Lake Kemp area.
Holotype: USNM 409692
Locality: Craddock Bone-bed, Southwest Lake Kemp, Baylor County, Texas.
Horizon: 5 meters below Red Tank Sandstone Member (informal), Arroyo Formation, Lower Clear Fork Group.
Biostratigraphy: Land-vertebrate faunachron lower D.
Age: Middle Leonardian stage, upper Rotliegendes, Early Permian.
Material: Skull.
Referred material:
Locality: 2 miles NW of Cockrell Ranch (now Powell Ranch), 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.
Locality: Pipe Site, Locality FA, Foard County, Texas.
Horizon: Choza Formation, Middle Clear Fork Group.
Biostratigraphy: Land-vertebrate faunachron lower D.
Age: Middle Leonardian stage, upper Rotliegendes, Early Permian.
Material: Skull with broad mandible..