Genus: Trilophosaurus CASE, 1928
Etymology:
= Chinleogomphius SUES & OLSEN, 1993
Etymology: In reference to the Chinle Formation, Arizona, Greek, gomphios, “cheek,
tooth”: Chinle cheek-tooth.
Species: buettneri CASE, 1928
Etymology:
Holotype: UCMP 2338
Locality: Walker's Tank, Crosby County, Western Texas.
Horizon: Tecovas Member, Dockum Formation.
Biostratigraphy:
Age: Carnian Stage, Late Triassic Epoch, Late Triassic.
Material: Fragment of dentary.
Referred material:
GREGORY
Locality: Quarry 1, 800 feet south and 1100 feet west of the northeast corner of a 4-section tract belonging to Mrs. Sarah Mina Hyman, Mrs. Otis Chalk, and Mrs. Doris Roberts, it lies in the extreme southeast corner of sec. 58, blk, 29, Waco and Northwestern Railroad Company Survey, about 3 miles north of Otis Chalk, Howard County, Texas.
Horizon: “Pre-Tecovas Horizon”, Dockum Group.
Biostratigraphy:
Age: Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
No. 31025-3: Dentary.
No. 31025-4: Frontal and parietal.
No. 31025-108: Lower jaw.
No. 31025-46: Middle cervical vertebra.
No. 31025-67TT: Femur.
No. 31025-68R: Right scapula.
No. 31025-69H: Right coracoid.
No. 31025-77: Right ilium.
No. 31025-77D: Left ilium.
No. 31025-78, 31025-78I: Left ischia.
No. 31025-79B: Pubis.
No. 31025-80F: Tibia.
No. 31025-80P: Left tibia.
No. 31025-81H: Right ulna.
No. 31025-82: Right radius.
No. 31025-82P: Left radius.
No. 31025-83A, 31025-83C: Fibulae.
No. 31025-83M: Left radius.
No. 31025-90: Caudal chevrons.
No. 31025-140: Skull missing anterior end, dentary missing anterior end, 8 cervical, 2 dorsal, 2 sacral, and 1 caudal vertebrae, ilium, ribs, pectoral girdle, left humerus, right ulna, femur, right astragalus, left astragalus, right calcaneus, right navicular, left navicular, right pes, and left manus.
No. 31025-143: Skull missing posterior end.
No. 31025-144: Interclavicle.
No. 31025-127, 31025-105: Skulls missing posterior end.
No. 31025-661: Right humerus.
DEMAR & BOLT, 1981
TMM 31025: 1-3, 93-95, 97-112, 115, 120-121, 125, 138, 163, 165, 175, 194, 207, 209, 214, 215, 217, 220-224, 228-230, 234, 238, 242, 243, 248-250:
LONG & MURRY, 1995
TMM 31025-207, TMM 31025-211, TMM 31025-239, TMM 31025-241: Partial skulls.
TMM 31025-142, TMM 31025-240, TMM 31025-244: Braincases.
TMM 31025-5, TMM 31025-109, TMM 31025-116, TMM 31025-119, TMM 31025-196, TMM 31025-205, TMM 31025-206, TMM 31025-233: Mandibulae.
TMM 31025-265: Left femur of a robust trilophosauird.
Locality: Quarry 2, lies 100 yards from Quarry 1, Howard County, Texas.Horizon: “Pre-Tecovas Horizon”, Dockum Group.
Biostratigraphy:
Age: Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
Number: Not given: Immature individuals of several skeletons.
DEMAR & BOLT, 1981
Locality:
Horizon:
Biostratigraphy:
Age:
Material:
TMM 31099: 1, 13C, 13D, 13F, 14, 15, 15A, 16-22.
Locality: Petrified Forest National Park, Apache County, Arizona.
Horizon: Lower Petrified Forest Member, Chinle Formation.
Biostratigraphy:
Age: Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
PEFO 3893, 3894, 3895: 3 teeth.
HECKERT, 2001
Locality: NMMNH Locality 1312, Crosby County, Texas.
Horizon: Colorado City Member, Dockum Formation, Chinle Group (Lower Kalgary).
Biostratigraphy:
Age: Upper Otischalkian, Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
NMMNH P-34291: Tooth.
NMMNH P-34292: Fragmentary polycuspate teeth.
= Trilophosaurus? sp
NMMNH P-34293: Numerous fragmentary teeth.
NMMNH P-34294: Enamel-less polycuspate teeth.
Locality: NMMNH 1430, at the head of the south fork of Home Creek north of Kalgary Locality, UTM 3701500N, 398850E, zone 14, NAD 27, Crosby County, Texas.
Horizon: Colorado City Member, Tecovas Formation, Chinle Group.
Biostratigraphy:Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
NMMNH P-26422: Numerous teeth with low cusps lacking cingula.
NMMNH P-34074: Incomplete tooth.
NMMNH P-34075: High-cupsed tooth.
NMMNH P-34373, 34374, 34375: Enamel-less teeth.
NMMNH P-34376: Nearly complete teeth.
Locality: NMMNH Locality 860 (Trilophosaurus quarries), Howard County, Texas
Horizon: Colorado City Member, Dockum Formation, Chinle Group.
Biostratigraphy:
Age: Upper Otischalkian, Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
NMMNH P-29397: 2 incomplete, laterally compressed, sharpely curved unguals.
NMMNH P-29398: A caudal vertebra.
HECKERT, LUCAS, ZEIGLER & KAHLE, 2001
Locality: NMMNH Locality 3775, Borden County, Texas.
Horizon: Uppermost Tecovas Formation.
Biostratigraphy:
Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
Number: Not given: Skull elements, teeth, and skeletal elements from several individuals.
KAYE & PADIAN, 1992/KAYE & PADIAN, 1994
Locality: UCMP loc. A269, the Placerias quarry, in a small valley 6 1/2 miles S 65"W of St. Johns, Located 0.3 miles northwest of Romero Springs at approximately Long. 109'28'W and lat. 34"27'N on the USGS St. Johns quadrangle of 1921, Apache County, Arizona.
Horizon: Bluewater Creek Formation, Lower Chinle Group.
Biostratigraphy:
Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
UCMP V3730: Jaw fragment.
MURRY, 1986
Locality: Kalgary, Crosby County, Texas.
Horizon: Dockum Formation.
Biostratigraphy:
Age: Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
Number: Not given: 71 Specimens.
Locality: Saurian Valley, PEFO 085002 (UCMP V82251, PF97) (part of UCMP V7034), NW 1/4 of SE 1/4, Sec. 15, and NE 1/4 of SW 1/4, Sec. 15. T 19N, R 23E, Lithodendron Wash Area, 6 to 8 m below? Sonsela Sandstone, Devil’s Playground Area, Petrified Forest, Apache County, Arizona.
Locality: Potter County, Texas.
Horizon: Dockum Formation.
Biostratigraphy:
Age: Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
Number: Not given:
MURRY, 1989Locality: Sunday Canyon Locality, SMU 123, 34'57"18N, 101'42"15W, badland along Sundy Creek, Fortress Cliff 7.5' Quadrangle, Randall County, Texas.
Horizon: Tecovas Member, Dockum Formation.
Biostratigraphy:Age: Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
Number: Not given:
Locality: Rotten Hill/Sierrita de la Cruz Locality, SMU 121, 35'23"06N, 102'09"40W, badlands along Sierrita de la Cruz Creek, Ady 7.5 Quadrangle, Potter County, Texas.Horizon: Tecovas Member, Dockum Formation.
Biostratigraphy:Age: Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
Number: Not given:
LONG & MURRY, 1995
Locality: Placerias quarry (UCMP A269, MNA 207C), Big Hollow Wash near Romero Springs, a small valley 6 1/2 miles (approximately 10.4 km) S 65"W of St. Johns, Located 0.3 miles northwest of Romero Springs at approximately Long. 109'28'W and lat. 34"27'N on the USGS St. Johns quadrangle of 1921, Apache County, Arizona.
Horizon: Bluewater Creek Formation, Lower Chinle Group.
Biostratigraphy:
Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
UCMP 32390: Proximal two-thirds of left femur.
UCMP 25877: Distal extremity of left humerus.
UCMP 25825, 25839: Proximal and distal extremities of left tibia.
UCMP 25826, 15798: Proximal and distal extremities of right sacral vertebrae.
UCMP 25790: Proximal extremity of right tibia.
UCMP 25424: Second sacral vertebra.
MNA Pl. 2924: Sacrals 1 and 2.
MAN Pl. 2956, 2928: Left and right ilia
Note: All MNA specimens may represent a single individual.
Locality: Agate Bridge N (UCMP V82339, PF 161), NE 1/4 of SE 1/4 and SE 1/4 of NE 1/4, SEC. 4, T 17N, R 24E, near base of black/grey siltstone, approximately 6 m below Sonsela Sandstone, resting on a loose sandstone, Lot’s Wife Area, Petrified Forest, Apache County, Arizona.
Horizon: Lower Petrified Forest Member, Chinle Formation.
Biostratigraphy:
Age: Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
UCMP: Caudal vertebrae.
NMMNH: 2 caudal vertebrae.
Note: HUNT, LUCAS, HECKERT, SULLIVAN & LOCKLEY, 1998 state that pers. comm. from LONG, that Coelophysis cervical (elongate centra) vertebrae from this locality belong to Trilophosaurus.
Locality: Saurian Valley, PEFO 085002 (UCMP V82251, PF97) (part of UCMP V7034), NW 1/4 of SE 1/4, Sec. 15, and NE 1/4 of SW 1/4, Sec. 15. T 19N, R 23E, Lithodendron Wash Area, 6 to 8 m below? Sonsela Sandstone, Devil’s Playground Area, Petrified Forest, Apache County, Arizona.
Horizon: Lower Petrified Forest Member, Chinle Formation.
Biostratigraphy:
Age: Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
UCMP 126749: Caudal vertebra.
UCMP: Ilium.
Locality: Hole at Canada Colorado, 4 km east of Lamy, Santa Fe County, New Mexico.Horizon: Los Esteros Member, Santa Rosa Formation.
Biostratigraphy:
Age: Lower Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
NMMNH: Proximal extremity of right tibia of a very large individual.
Locality: Site 1 (TMM Locality 31213), Borden County, Texas.
Horizon: “Pre-Tecovas Horizon”, Dockum Group.
Biostratigraphy:
Age: Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
TMM 31213-13: Vertebrae (mixed with dorsal vertebrae and other taxa). TMM 31213-8: Large humerus.
TMM 31213-12: Nearly complete proximal and distal portions of humeri.
TMM 31213-11: Proximal ends of three femora.
Locality: Quarry 3, (TMM Locality TMM 31100-443, Near Otis Chalk, Howard County, Texas.Horizon: Los Esteros Member, Santa Rosa Formation.
Biostratigraphy:
Age: Lower Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
TMM 31100-443: Braincase.
MURRY & LONG, 1989Locality: Dying Ground (PF 121, SMU #228), Sec. 23, T 18N, R 24E in variegated siltstone bed, 34'56"36N, 109'45"55W, Blue Mesa W Area, Petrified Forest, Apache County, Arizona.
Horizon: Chinle Formation.
Biostratigraphy:
Age: Late Triassic.
Material:
Number: Not given:
= Trilophosaurus jacobsi (sic?) POLCYN, WINKLER, JACOS & NEWMAN, 2002
Locality: SMU locality 252, vicinity of North Stinking Springs Mountian, what use to be Seven Springs Ranch, northwest of St. Johns, Apache County, Arizona.
Horizon: Lowe Petrified Forest Formation, Chinle Group.
Biostratigraphy:
Age: Late Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
Number: Not given:
_____________________________________________________________________________________
Species: jacobsi MURRY, 1987 emend HECKERT,
LUCAS, RINEHART, SPIELMANN, & KAHLE, 2003,
= Trilophosaurus? jacobsi MURRY, 1987
= Chinleogomphius jacobsi (MURRY,
1987) SUES & OLSEN, 1993
Etymology:
Holotype: MNA V3192
Locality: Placerias quarry (UCMP A269, MNA 207C), Big Hollow Wash near Romero Springs, a small valley 6 1/2 miles (approximately 10.4 km) S 65"W of St. Johns, Apache County, Arizona. (Located 0.3 miles northwest of Romero Springs at approximately Long. 109'28'W and lat. 34"27'N on the USGS St. Johns quadrangle of 1921.)
Horizon: Lower Bluewater Creek Formation.
Biostratigraphy:
Age: Otischalkian, Late Triassic (LUCAS, HECKET & HUNT, 1995) (Old Lower Petrified Forest Member, Chinle Formation, Adamanian, Late Triassic.)
Material: Right mandible fragment.
Referred material:
MNA V3193, V3198, V3199: 3 mandible fragments.
MNA V3197, V3194: 3 maxillary fragments.
MNA V3195, V3200: 2 teeth.
HECKERT, 2001
Locality: NMMNH 1430, at the head of the south fork of Home Creek north of Kalgary Locality, UTM 3701500N, 398850E, zone 14, NAD 27, Crosby County, Texas.
Horizon: Colorado City Member, Tecovas Formation, Chinle Group.
Biostratigraphy:Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
NMMNH P-34073: Tooth.
NMMNH P-34372: Tooth fragment.
NMMNH P-26442: Posterior
Locality: NMMNH Locality 2739, Sixmile Springs, New Mexico.
Horizon: Bluewater Creek Formation, Lower Chinle Group.
Biostratigraphy:
Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.
Material:
NMMNH P-34447: Tooth fragment.