Species: sideropelicus COPE, 1878
Etymology:

Holotype: AMNH 4360

Locality: 5 miles South of Dundee, near Woodrum Ranch House, Northeast corner, Sec. A1195 SPRP Survey, 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: Fragment of a left lower jaw with but 2 perfectly preserved teeth and 2 broken ones, and some fragmentary vertebrae.

Neotype: FMNH UR 27: Skull and lower jaws, a complete series of presacral vertebrae, complete scapulo-coracoids, a clavicle, and well-preserved ribs.

Referred material:

BERMAN, SUMIDA & LOMBARD, 1992

Locality: 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 4839: Nearly complete skull without lower jaws.

AMNH 4532: Partial skull without lower jaws.

FMNH UR27 (formerly MCZ 1105): Nearly complete skull without lower jaws, presacral column and pectoral girdle.

 

Locality: 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:

FMNH 1177: Skull, pelvis, 15 dorsal vertebrae and ribs.

 

LYDEKKER, 1889

Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

BMNH R 575 a: Part of left maxilla.

BMNH R 575b: Smaller fragment of left maxilla.

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Species: molaris COPE, 1878
Etymology: Latin, molaris, "molar."
= Empedocles molaris (COPE, 1878) COPE, 1880
= Diadectes (Empedocles) molaris (COPE, 1878) KUHN in CARROLL, KUHN & TARARINOV, 1972
= Empedias molaris (COPE, 1878) COPE, 1883

Holotype: AMNH 4347

Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material: Fragment containing 2 large teeth and the base of a third.

Paratypes: AMNH 4350: A fairly complete skull lacking the basioccipital region.

Referred material:

HUENE, 1913

Locality: Coffee Creek, Baylor County, Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

AMNH 4352: Fragmentary skull.

AMNH 4838: Fragmentary skull.

AMNH 4370: Fragmentary skull.

 

LYDEKKER ,1889

Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

BMNH R 572: Imperfect dorsal vertebra.

BMNH R 613: Part of left maxilla and 5 posterior check teeth.

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Species: phaseolinus COPE, 1880
Etymology:
= Empedias phaseolinus (COPE, 1880) COPE, 1883

Holotype: AMNH 4349

Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material: Maxillary bones of 3 animals and the mandible with most of the tooth line of a fourth, a maxillary and a single vertebra.

Referred material:

CASE, 1911

Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

AMNH 4684: Fragmentary skeleton.

 

CASE, 1905

Locality:

Horizon:

Biostratigraphy:

Age:

Material:

MCZ 1075: Skull and skeleton lacking feet.

MCZ 1076: The anterior portion of a skull with complete right half of the lower and a portion of the vertebral column.

MCZ 1077: Sacrum and 7 presacral vertebrae of a much larger specimen.

MCZ 1078: Skull.

MCZ 62. Imperfect skeleton showing the caudal region and some of the limb and foot bones.

 

CASE

Locality: Godlin Creek, Archer County, Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

AMNH 4839: Skull lacking premaxillaires, the articular portion of the left quadrate and lower jaws.

AMNH 4684: Skeleton.

 

LYDEKKER, 1889

Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

BMNH R 575: Fragment of left maxilla.

 

ROMER & BYRNE, 1921

Locality: East Coffee Creek, Baylor County, Texas.

Horizon: Very bottom of the Clear Fork.

Biostratigraphy:

Age: Early Permian.

Material:

Number: Not given: Partial skeleton.

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Species: fissus (COPE, 1883) COPE, 1896b
= Empedias fissus COPE, 1883
Etymology: Latin, fissus, "to split, cleave."

Holotype: AMNH 4348

Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material: 2 individuals, a maxillary with dentition and a fragmentary skull.
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Species: biculminatus COPE, 1896
Etymology: Latin, bi, "two" and Latin, culminatus, the past participle of culminare, “to crown.” 

Holotype: AMNH 4374

Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material: A fragment of a mandible with 2 complete teeth.
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Species: tenuitectus (COPE, 1896) ROMER, 1944
Etymology:
= Bolbodon tenuitectus COPE, 1896

Holotype: AMNH 4375

Locality: Wichita Basin, ?Coffee Creek, Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material: Right half of a skull.

Referred material:

BERMAN & HENRICI, 2003

Locality: Near East Coffee Creek, Baylor County, Texas.

Horizon: Clear Fork Group.

Biostratigraphy:

Age: Early Permian.

Material:

FMNH UR345: A partial skeleton of a very large individual.

 

ROMER

Locality: Unknown, but presumably from the Coffee Creek region of 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:

MCZ 1035: Skull and skeleton.

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Species: maximus CASE, 1911
Etymology: Latin, maximus, "greatest."

Holotype: AMNH 4392

Locality: Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material: 3 large lumbar vertebrae.

Referred material:

AMNH Cope Collection 4361: Femur.

AMNH 4838: Anterior caudal vertebra.

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Species: lentus (MARSH, 1878) CASE & WILLISTON, 1912
Etymology: Latin, lentus, "tough."
= Nothodon lentus MARSH, 1878
= Diadectes (Nothodon) lentus (MARSH, 1878) KUHN, in CARROLL, KUHN & TATARINOV, 1972
= Diadectes (Bolbodon) lentus (COPE, 1896) KUHN, in CARROLL, KUHN & TATARINOV, 1972 (sic)
Note: This is more likely than not a typo for Bolbodon tenuitecteus.

Holotype: YPM

Locality: New Mexico.

Horizon: Abo Formation.

Biostratigraphy:

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

Material: Fragmentary skull and limb bones.

Referred material:

BERMAN, 1993

Locality: Arroyo de Agua Locality, New Mexico.

Horizon: Upper Cutler Formation.

Biostratigraphy:

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

Material:

Number: Not given:

 

Locality: Poelo Creek in Rio Arriba County, New Mexico.

Horizon: Baldwin bone beds.

Biostratigraphy:

Age: Early Permian.

Material:

Number: Not given: Skull.

 

CASE & WILLISTON, 1912

Locality: Northern New Mexico.

Horizon: Upper Cutler Formation.

Biostratigraphy:

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

Material:

CNHM UC 675: Skull.

?Nothodon lentus HUENE, 1913

Locality: Coffee Creek, Baylor County, Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

AMNH 4378: Fragmentary skull.

WELLES, 1941

Locality: Locality UCMP V-3431, Anderson Quarry, 1.3 km southwest of the type locality of Stegotretus agyrus, 3/4 of a mile S55'W of Loma Salazar in a small gulch some 1,385 yards S14'W of the Rio Pueroc Bridge SE 1/4, NW 1/4, SW 1/4,just above massive sandstone lens one mile above confluence of Rio Puerco and Poleo Creek, and 1/4 miles east of Rio Puerco, SW 1/4, Sec. 8, T22N, R3E, near Arroyo del Agua, Rio Arriba County, New Mexico.

Horizon: Upper part of the El Cobre Canyon Formation, Cutler Group (Cutler Formation, Abo Formation).

Biostratigraphy:

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

Material:

UCMP 33903: Right mandible.

UCMP 22904: Right mandible.

UCMP 33905: Vertebra.

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Species: cretin (CASE, 1911) emend KUHN, in CARROLL, KUHN & TARATINOV, 1972
Etymology:
= Diadectoides cretin CASE, 1911
= Diadectes (Diadectoides) cretin (CASE, 1911) KUHN, in CARROLL, KUHN & TATARINOV, 1972

Holotype: FMNH UC 650

Locality: Indian Creek, northeast of Vernon Road, Texas.

Horizon: Clear Fork Formation.

Biostratigraphy:

Age: Early Permian.

Material: Fragmentary skeleton.
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Species: carinatus (CASE & WILLISTON, 1912)
Etymology: Latin, carinatus, "keeled."
= Animasaurus carinatus CASE & WILLISTON, 1912
= Diadectes (Animasaurus) carinatus (CASE & WILLISON, 1912) KUHN, in CARROLL, KUHN & TATARINOV, 1972

Holotype: YPM 1107

Locality: Animas, Hidaglo County, New Mexico.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material: Fragmentary skull.
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Species: huenei BROOM, 1914
Etymology: In honor of Fredrich von Huene.

Holotype: AMNH 4352

Locality:

Horizon:

Biostratigraphy:

Age:

Material: Skull.

Referred material:

AMNH 4378: Fragmentary skull.

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Species: absitus SUMIDA, BERMAN & MARTENS, 1992
Etymology: Latin, absitus, " distant, apart, or remote," referring to its distant occurrence form all other known members of the genus that occur in North America.
= Silvadectes absitus (SUMIDA, BERMAN & MARTENS, 1992) KISSEL, 2010 (nomen subscriptum) Note: This name appeared in a thesis but has not been formally published.

Holotype: Museum der Natur Gotha, Inv.-Nr. MNG 8747

Locality: Bromacker Locality in the middle of the Thuringian Forest near Gotha, Thuringen State, Central Germany.

Horizon: Tambach Formation.

Biostratigraphy:

Age: Lowermost unit of the upper Rotliegend Epoch, Early Permian.

Material: Well-preserved skull.

Referred material:

MNG 7721, 8978: Greater portions of articulated and partially articulated, prespectively, postcranial skeletons.

BERMAN & HENRICI, 2003

MNG 10650: An isolated, partial, articulated right pes and crus.

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Species: dreigleichenensis PONSTEIN, MacDOUGALL & FRÖBISCH, 2024
Etymology: In honor of Drei Gleichen (German maning: three of the same), in reference to the seemingly similar looking now three diadectids from the Bromacker Locality. Drei Gleichen itself referes to three icnonic castles form the Middle Ages, each situated on a hill top between Gotha and Erfurt within the UNECO Global Geopark Inselberg-Drei Gleichen, which also contians the Bromacker locality. Moreover, Drei Gleichen is also the name of the municipality, where the authors resided during recent excavations at the Bromacker locality, as several other researchers hve done since the 1990s.

Holotype: MCZ 2989

Locality: Bromacker Locality in the middle of the Thuringian Forest near Gotha, Thuringen State, Central Germany.

Horizon: Tambach Formation.

Biostratigraphy:

Age: Lowermost unit of the upper Rotliegend Epoch, Early Permian.

Material: A partial skeleton consisting of a slightly distorted skull with several articulated cervical, a few incomplete ribs, a partial pectoral girdle consisting of left and right clavicles, the interclavicle, left cleithrum, left scapulocoracoid and the left forelimb.