Genus: Eocaptorhinus HEATON, 1979
Etymology: Greek, eos, “dawn” + Captorhinus: Dawn captorhinid.

Species: laticeps (WILLISTON, 1909) HEATON, 1979
Etymology: Latin, lati, "wide" and Latin, -ceps, "head."
= Pariothynchus laticeps WILLISTON, 1909

Holotype: FMNH UC 642

Locality: Mitchell Creek, 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: Skull and skeleton.

Referred material:

FMNH UC 701: Skull and slightly disarticulated cervical vertebrae.

FMNH UC 1698: Juvenile skull, some dorsoventral crushing.

FMNH UC 196: Miscellaneous fragments.

FMNH UC 228: Mandibular fragments, mold of single tooth-row.

FMNH UC 1043: Fragmentary skull and lower jaw.

FMNH UC 1045: Fragment of posterior portion of left mandible.

 

Locality: Weiss Locality, Red Pasture line house, Wilbarger 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:

MCZ 1740: Complete skull in very hard clay matrix, bone replaced by silica (?), some curshing of back of skull.

 


Locality: 1 mile South of Electra, HT and B RR Survey A-137, about middle of N section line, Wichita 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:

MCZ 2804: Jaw and partial braincase.

 


Locality: Trematops locality, west of Willimas Ranch, J. jgibbs Survey A-5666, southeast of Fulda, 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 1483: Fragmentary skull and left femur.

 

DILKES & REISZ, 1986

Locality: McCann Quarry, 3 km northeast of Eddy, Kay County, Oklahoma.

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

Biostratigraphy:

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

Material:

OUSM 15020A: Complete snout forward of center of orbits, right mandible has been removed to reveal single maxillary tooth row, right mandible was completely destroyed during this procedure.

OUSM 15020B: Crushed posterior half of skull with palate and braincase, first 20 presacral vertebrae and tiny fragment of 21st, ribs in articulation, partial pectoral girdle and right manus.

OUSM 15024: Crushed skull with well-preserved palate and braincase, presacral vertebrae 18-25 exposed laterally and ventrally, sacral vertebrae 1 & 2, caudal vertebrae 1-14 with ribs on first 5 and haemal arches from 6 to 8, right manus with carpals, left pes with astragulus, calcaneum and distal tarsals, left femur with damaged distal end, left tibia with damaged ends.

OUSM 15022: Skull.

OUSM 15023: Scattered skull fragments.

OUSM 15024: Fragmentary skull, presacral vertebrae 18-25, sacral vertebrae 1 & 2, caudal vertebrae 1-14, ribs, chevrons, right manus, distal extremities of ulna and radius, slight damage to distal and major damage to proximal extremities, astragalus, calcaneum and partially hidden distal tarsals, of right pes, right metacarpals, 1, 2, 4, 5 and all phalanges preserved.

OUSM 15025: Fragmentary skeleton.

OUSM 15027: Assorted fragments.

OUSM 15101: Fragmentary skull and skeleton lacking tail.

OUSM 15102: Skull and mandible.