Species: baylorensis BROILI, 1904
Etymology: In reference to Baylor County, Texas.
Holotype: AMNH 4342
Locality: West Coffee Creek, near Seymour, Baylor County, Texas.
Horizon: Clear Fork Group.
Biostratigraphy:
Age: Artinskian Stage, Lower Rotliegendes Epoch, Early Permian.
Material: Incomplete skull.
Referred material:
LAURIN, 1996
MCZ 1081: Skull lacking most of the palate.
MCZ 1083: A string of presacral vertebrae, an ulna, an incomplete right lower jaw, and the left half of a skull lacking the braincase and occiput.
MCZ 1084: A fragmentary skull consisting of the posterior portion of the skull table, occiput, parts of the braincase, isolated fragments of the palate and cheek, and a left lower jaw.
MCZ 1086: An incomplete skull.
FMNH UR 458: A poorly preserved skull, three strings of vertebrae including parts of two atlas-axis complexes, two femora, and other fragments of the appendicular skeleton.
BMS E3500: Skull with mandibles.
Locality: About 7.5 km east and 4/5km north of Henrietta, Clay 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:
TMM 31189-1: Skull with lower jaws lacking the braincase and most of the palate.
BERMAN & MARTENS, 1993
Locality: Texas.
Horizon: Nocona Formation (Admiral Formation), Wichita Group.
Biostratigraphy:
Age: Leonardian stage, Latest Wolfcampain Series, Sakmarian stage, upper lower to lower middle Rotilegendes Epoch, Early Permian.
Material:
CNHM 663, MCZ 1082, 1085: Skulls.
OLSON
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:
Number: Not given: A mounted skeleton and 2 other specimens.
SANDER, 1989
Locality: Archer City Bonebed 2, 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:
Number: Not given: Vertebrae.
SUMIDA, LOMBARD & BERMAN, 1992
Locality: Baylor County, Texas.
Horizon: Clear Fork Group undivided, Clear Fork Group.
Biostratigraphy:
Age: Artinskian Stage, Lower Rotliegendes Epoch, Early Permian.
Material:
FMNH 6138: Anterior portion of a vertebral column.
Locality: ‘Labidosaurus pocket’, Middle Coffee Creek, Baylor County, Texas.
Horizon: Clear Fork Group undivided, Clear Fork Group.
Biostratigraphy:
Age: Artinskian Stage, Lower Rotliegendes Epoch, Early Permian.
Material:
FMNH UR 458: 2 anterior strings from 2 different individuals.
WILLISTON, 1918
Locality: Craddock Bonebed, 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:
Number: Not given: Fragmentary skulls and skeletons of two individuals.
Locality: West Coffee Creek, Baylor County, Texas.
Horizon: Clear Fork Formation, Clear Fork Group.
Biostratigraphy:
Age: Artinskian Stage, Lower Rotliegendes Epoch, Early Permian.
Material:
Number: Not given: Fragmentary skull and fragmentary skeleton of a juvenile.
WILLISTON
Locality: Near Seymour, Baylor County, Texas.
Horizon:
Biostratigraphy:
Age: Early Permian.
Material:
Number: Not given: Skull and skeleton.
= Conodectes favosus COPE, 1896
Etymology:Holotype: AMNH 4342
Locality: Gray Creek, Baylor County, Texas.
Horizon:
Biostratigraphy:
Age: Early Permian.
Material: Fragmentary skull.
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Species: sanjuanensis VAUGHN, 1966
Etymology: In reference to San Juan County, Utah.
Holotype: NTM VP 1024
Locality: Near the intersection of secs, 17, 18, 19 and 20, T43S, R17E, San Juan County, Utah.
Horizon: Lower Organ Rock Shale, Lower Leonardian series.
Biostratigraphy:
Age: Lower Artinskian Stage, Lower Rotliegendes Epoch, Early Permian.
Material: A horizontally compressed skull lacking the tip of the snout and a part of the interorbital region.
Paratypes:
NTM VP1023: A distorted, articulated skull lacking its posterior portion but associated with parts of the clavicles and interclavicles.
NTM VP1025: Impression a skull roof with parts of the skull table, anterior vertebrae, and parts of shoulder girdle and forelimb.
NTM VP1026: Fragmentary skull roof with anterior vertebrae and parts of the front limbs.
Referred material:
NTM VP 1027: Innominate bone and attached proximal part of femur.
NTM VP1028: Manus with impressions of epipodials.
NTM VP1029: Posterior most dorsal, sacral and anterior most caudal vertebrae and a femur, tibia and fibula.
NTM VP1030: A string of about half a dozen caudal vertebrae.
NTM VP1031: A partial shoulder girdle and attached proximal part of humerus.
NTM VP1032: Partial innominate bone and attached femur.
Locality: SW 1/4, SE 1/4, sec 24, T43S, R16E, San Juan County, Utah.Horizon: Lower Orange Rock Shale, Lower Leonardian series.
Biostratigraphy:
Age: Lower Artinskian Stage, Lower Rotliegendes Epoch, Early Permian.
Material:
NTM VP 1033: A partial braincase.
NTM VP1034: Palatal fragment.
NTM VP1035: Fragmentary skull and lower jaw.
NTM VP1036, 1037, 1038: Fragmentary skeletons.
BERMAN, 1993
Locality: Arroyo de Agua Locality, New Mexico.
Horizon: Cutler Formation, Wolfcampian.
Biostratigraphy:
Age: Lower Rotliegendes Epoch, Early Permian.
Material:
Number: Not given:
BERMAN & MARTENS, 1993
Locality: Rio Arriba County, New Mexico.
Horizon: Cutler Formation.
Biostratigraphy:
Age: Permo-Pennsylvanian.
Material:
CM 38022: Nearly complete skeleton missing parts of fore and hind limbs and part of tail.
CM 38559: Complete articulated vertebral column and portion of pelvic girdle.
CM 28596, 28597: Skulls.
Locality: Utah.
Horizon:
Biostratigraphy:
Age: Early Permian.
Material:
NTM VP 1023, 1024, 1025, 1034: Skulls.
= Seymouria cf sanjuanensis BERMAN & MARTENS, 1993
Etymology:Locality: Bromacker locality, of the middle part of the Thuringian Forest near the Village of Tambach-Dietharz and about 20 km south of the town of Gotha, central Germany.
Horizon: Uppermost level of 60 m thick middle sandstone unit, Tambach Formation.
Biostratigraphy:
Age: Lowermost unit of the upper Rotliegend Epoch, Early Permian.
Material: MNG 7727: Greater part of a skull, with both jaws closely attached, and isolated but closely associated right clavicle and ilium.
MNG 8759: Skull and a partial articulated skeleton.
BERMAN, HENRICI, SUMIDA & MARTENS, 2000
MNG 10553, 10554: 2 nearly complete specimens.
KLEMBRARA, MARTENS & BARTIK, 2001
MNG 7747: Left forlimb of a juvenile found near MNG 7727.
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Species: grandis OLSON, 1979
Etymology: Latin, grandis, "large."
= Labidosaurikos meachami MCLEAN, 1970
Etymology:
Holotype: FMNH UR 1031
Locality: West side of US highway 77, north of the Cimarron River and south of Crescent, Logan County, Oklahoma.
Horizon: Lower Fairmont Shale, Hennessey Group.
Biostratigraphy:
Age: Artinskian Stage, Lower Rotliegendes Epoch, Early Permian.
Material: Fragmentary skull and anterior cervical vertebra.
Referred material:
UCLA VP 3152: Fragments of skull and two intermediate cervical vertebrae.
UOSM 4-6-51 (catalogue number 15031): Presacral vertebrae and atlas.
Locality: Blackwood Ranch, 5.0 km south of Buffalo Gap, 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 VP485: 2 vertebrae.
UCLA VP459: A small dorsal vertebrae.
UCLA VP559: 2 large dorsal lumbar vertebrae.
UCLA VP570: Small, presacral vertebra.
UCLA VP575: Part of a maxilla with alveoli for teeth, proximal half of femur.
UCLA VP597: Interclavicle.