Species: archeri PRICE, 1937
Etymology: In honor of Michael Archer.
Holotype: MCZ 1532
Locality: Cottonwood Creek, 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: Skull and anterior portions of postcranial skeleton.
Referred material:
MCZ 2149: Laterally compressed skull.
MCZ 2148: Laterally compressed skull lacking snout region, pectoral girdle and anterior vertebrae.
MCZ 2150: Dorsoventrally compressed skull and postcranial elements.
MCZ 2147: Dorsoventrally compressed skull.
FMNH UR 379: Cast of type.
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Species: morani (ROMER, 1952) CLARK & CARROLL, 1973
Etymology:
= Melanothyris morani ROMER, 1952
Holotype: CM 8617
Locality: Dunkard locality 9, near Blacksville, West Virginia.
Horizon: Equivalent to the Lower Wichita Group.
Biostratigraphy:
Age: Leonardian stage, Upper Rotilegendes Epoch, Early Permian.
Material: Skull laterally compressed.
Referred material:
MCZ 2151: Dorsoventrally compressed skull and associated postcranial material.
MCZ 2152: Skull.
MCZ 4110: Posterior portion of skull roof and left check region.
MCZ 4111: Badly crushed skull.
MCZ 4112: Dorsoventrally crushed skull.
MCZ 4113: Incomplete skull associated with MCZ 2151.