Otis Chalk Quarry 3, TMM 31100: Carnian - Norian, Texas
collected by WPA 1939–1941

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Archosauria
Archosauria indet. Cope 1869
Elder 1987 1 specimen
Reptilia
Phytosauria indet. (Jaeger 1828)
87 specimens
See Long & Murry (1995, p. 226) for full list of specimens
Reptilia - Parasuchidae
Angistorhinus sp. Mehl 1913
Anonymous 1940 9 specimens
    = Angistorhinus megalodon Case 1929
Long and Murry 1995
TMM 31100-11, 12, 126, 164, 167, 209, 293, 298. ROM 7977 (was TMM 31100-238)
? Promystriosuchus sp. Case 1922
Anonymous 1940 6 specimens
    = Paleorhinus bransoni Williston 1904
Long and Murry 1995
TMM 31100-8, 101, 175, 418, 419, 453
Reptilia
Lucasuchus hunti n. gen., n. sp. Long and Murry 1995
Long and Murry 1995 44 specimens
TMM 31100-257 (holotype), 31100-1, 2, 7, 109, 150, 267, 300, 312, 313, 340, 361, 468, 469, 471-477, 479-487, 489, 490, 492, 498-507, 528
Desmatosuchus sp. Case 1920
Anonymous 1940 13 specimens
    = Typothorax meadei Sawin 1947
Sawin 1947
TMM 31100-234, 236, 294, 312, 435, 515-518, 520, 522, 525, 530
Coahomasuchus kahleorum Heckert and Lucas 1999
Parker 2016 1 individual
TMM 31100-437, partial skull, paramedian, lateral, and ventral osteoderms, vertebrae, limb, and girdle material
Crocodylomorpha indet. (Hay 1930)
To et al. 2022
TMM 31100-1494
Postosuchus kirkpatricki Chatterjee 1985
Long and Murry 1995 3 specimens
TMM 31100-508, 513, 514
Reptilia - Shuvosauridae
Chatterjeea elegans Long and Murry 1995
Long and Murry 1995 10 specimens
TMM 31100-210, 353, 408, 414, 495, 496, 497, 509, 512
Reptilia
Lythrosuchus langstoni Long and Murry 1995
Long and Murry 1995 2 specimens
TMM 31100-510, 511
Poposaurus gracilis Mehl 1915
Long and Murry 1995 2 specimens
TMM 31100-126, 378
Coelurosauria indet. Huene 1914
Elder 1987 1 specimen
    = Chindesaurus bryansmalli Long and Murry 1995
Long and Murry 1995
TMM 31100-523, proximal femur
    = Theropoda indet. Marsh 1881
Marsh et al. 2019
? Ornithosuchidae indet. Huene 1908
Long and Murry 1995 9 specimens
    = Silesauridae indet. Langer et al. 2010
Nesbitt et al. 2010
TMM 31100-185, femur; TMM 31100-1309, femur; TMM 31100-1304, femur; TMM 31100-1303, femur; TMM 31100-172, tibia; TMM 31100-1330, tibia; TMM 31100-1311, tibia; TMM 31100-1319, humerus; and TMM 31100-1278, humerus.
Dromomeron gregorii n. sp. Nesbitt et al. 2009
Nesbitt et al. 2009 7 specimens
TMM 31100-1306, 464, 1308, 1234, 764, 278, 1314
Triopticus primus n. gen., n. sp. Stocker et al. 2016
Stocker et al. 2016 1 individual
TMM 31100-1030, posterior portion of a skull
Trilophosaurus sp. Case 1928
Elder 1987 1 specimen
    = Trilophosaurus buettneri Case 1928
Spielmann et al. 2008
TMM-31100-433, braincase
Amphibia - Temnospondyli - Metoposauridae
? Buettneria sp. Case 1922
35 specimens
    = Buettneria sp.
Anonymous 1940
    = Buettneria howardensis n. sp. Sawin 1944
Sawin 1944
TMM 31100-30, 42 (paratypes). TMM 31100-13, 19, 21, 27, 31, 34, 35, 36, 37, 40, 41, 43, 47, 90, 91, 92, 99, 123, 124, 160, 173, 174, 178, 237, 295, 297, 416, 417, 420, 431, 433A, 433B, 455
Palaeonisciformes - Palaeoniscidae
? Turseodus sp. Leidy 1857
Murry 1986
see common names

Geography
Country:United States State/province:Texas County:Howard
Coordinates: 32.2° North, 101.2° West (view map)
Paleocoordinates:4.9° North, 40.0° West
Basis of coordinate:based on nearby landmark
Altitude:740 meters
Geographic resolution:small collection
Time
Period: Triassic Epoch: Late Triassic
Stage: Carnian - Norian 10 m.y. bin: Triassic 3 - Triassic 4
*International age/stage:Olenekian - Rhaetian
Key time interval: Carnian - Norian
Age range of interval: 237 - 208.5 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Dockum Formation:Colorado City
Stratigraphic resolution:bed
Stratigraphy comments: ‘Pre-Tecovas Horizon’, Colorado City Formation, Dockum Group; latest Carnian–early Norian (To et al. 2022)

variously referred to the Iatan or Colorado City of the Dockum Group; low in formation
about 40 ft below site 1
Lithology and environment
Primary lithology: mudstone
Includes fossils?Y
Lithology description: ETE rock type adj: 0, ETE lithology comments: 0
Environment:crevasse splay
Geology comments: ETE sed env 1: fluvial, ETE sed env 2: floodplain ETE event: flood, ETE env comment: crev splay
Taphonomy
Modes of preservation:body
Lagerst�tten type:concentrate
Degree of concentration:concentrated
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Collection size:40 specimens
Reason for describing collection:taphonomic analysis
Museum repositories:TMM
Collectors:WPA Collection dates:1939–1941
Collection method comments: ETE Size: .; ETE reference list: 820, 813, 676, 889, 890, 839, 785, 858, 780, 817, 778, 854, 803, 777, 808, 814, 774, 823, 822, 789, 855, 838, 784, 671, 670, 787, 788, 790, 821, 877, 818, 674, 782, 734, ; ETE museum list:
Metadata
Also known as:ETE Locality 1581, Trilophosaurus Quarry 3, WPA, Work Project No.13352
Database number:22706
Authorizer:A. Behrensmeyer, M. Carrano, P. Mannion, B. Gee, R. Butler Enterer:A. Behrensmeyer, B. Gee, R. Butler, P. Mannion, M. Carrano
Modifier:P. Mannion Research group:taphonomy,vertebrate
Created:2001-05-29 01:00:00 Last modified:2022-07-15 11:09:17
Access level:the public Released:2001-05-29 01:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
71451. Anonymous. 1939. The third quarterly report covering the quarter ending December 31,1939 for the state-wide paleontologic-mineralogic survey in Texas. A Federal Works Agency Work Projects Administration Project. O.P. No. 665-66-3-233. State Serial No. 300-88 1-47 [M. Carrano/M. Carrano]

Secondary references:

71453 Anonymous. 1940. The fourth quarterly report covering the quarter ending March 31, 1940 for the state-wide paleontologic-mineralogic survey in Texas. A Federal Works Agency Work Projects Administration Project. O.P. No. 665-66-3-233. State Serial No. 300-88 1-29 [M. Carrano/M. Carrano]
71463 Anonymous. 1940. The fifth quarterly report covering the quarter ending June 30, 1940 for the state-wide paleontologic-mineralogic survey in Texas. A Federal Works Agency Work Projects Administration Project. O.P. No. 665-66-3-233. State Serial No. 300-88 1-25 [M. Carrano/M. Carrano]
71464 Anonymous. 1940. The sixth quarterly report covering the quarter ending September 30, 1940 for the state-wide paleontologic-mineralogic survey in Texas. A Federal Works Agency Work Projects Administration Project. O.P. No. 665-66-3-233. State Serial No. 300-88 1-44 [M. Carrano/M. Carrano]
71466 Anonymous. 1940. The seventh quarterly report covering the quarter ending December 31, 1940 for the state-wide paleontologic-mineralogic survey in Texas. A Federal Works Agency Work Projects Administration Project. O.P. No. 665-66-3-233. State Serial No. 300-88 1-44 [M. Carrano/M. Carrano]
71467 Anonymous. 1941. The eighth quarterly report covering the quarter ending March 31, 1941 for the state-wide paleontologic-mineralogic survey in Texas. A Federal Works Agency Work Projects Administration Project. O.P. No. 665-66-3-233. State Serial No. 300-88 1-47 [M. Carrano/M. Carrano]
5936ETE 1717R. L. Elder. 1987. Taphonomy and paleoecology of the Dockum Group, Howard County, Texas. Journal of the Arizona-Nevada Academy of Science 22(1):85-94 [A. Behrensmeyer/A. Behrensmeyer/M. Carrano]
60136 C. T. Griffin and S. J. Nesbitt. 2016. The femoral ontogeny and long bone histology of the Middle Triassic (?late Anisian) dinosauriform Asilisaurus kongwe and implications for the growth of early dinosaurs. Journal of Vertebrate Paleontology 36(3):e1111224:1-22 [M. Carrano/M. Carrano]
17273ETE A. B. Heckert. 2004. Late Triassic microvertebrates from the lower Chinle Group (Otischalkian-Adamanian: Carnian), southwestern U.S.A. New Mexico Museum of Natural History and Science Bulletin 27:1-170 [M. Carrano/M. Carrano]
24941ETE A. B. Heckert and S. G. Lucas. 2006. Micro- and small vertebrate biostratigraphy and biochronology of the Upper Triassic Chinle Group, southwestern USA. In J. D. Harris, S. G. Lucas, J. A. Spielmann, M. G. Lockley, A. R. C. Milner, J. I. Kirkland (eds.), The Triassic-Jurassic Terrestrial Transition. New Mexico Museum of Natural History and Science Bulletin 37:94-104 [M. Carrano/M. Carrano/P. Wagner]
32141 A. B. Heckert, S. G. Lucas, L. F. Rinehart, J. A. Spielmann, A. P. Hunt and R. Kahle. 2006. Revision of the archosauromorph reptile Trilophosaurus, with a description of the first skull of Trilophosaurus jacobsi, from the Upper Triassic Chinle Group, West Texas, USA. Palaeontology 49(3):621-640 [R. Butler/R. Butler]
19338ETE T. M. Lehman and S. Chatterjee. 2005. Depositional setting and vertebrate biostratigraphy of the Triassic Dockum Group of Texas. Journal of Earth Systems Science 114(3):325-351 [M. Carrano/M. Carrano]
14122ETE R. A. Long and P. A. Murry. 1995. Late Triassic (Carnian and Norian) Tetrapods from the Southwestern United States. New Mexico Museum of Natural History and Science Bulletin 4:1-254 [M. Carrano/M. Carrano/P. Wagner]
75613 A. D. Marsh, W. G. Parker, M. C. Langer and S. J. Nesbitt. 2019. Redescription of the holotype specimen of Chindesaurus bryansmalli Long and Murry, 1995 (Dinosauria, Theropoda), from Petrified Forest National Park, Arizona. Journal of Vertebrate Paleontology 39(3):e1645682 [B. Gee/B. Gee]
13249ETE P. A. Murry. 1986. Vertebrate paleontology of the Dockum Group, western Texas and eastern New Mexico. In K. Padian (ed.), The Beginning of the Age of Dinosaurs: Faunal Change Across the Triassic–Jurassic Boundary. Cambridge University Press, Cambridge 109-137 [M. Carrano/M. Carrano/M. Carrano]
78626 P. A. Murry. 1987. Notes on the stratigraphy and paleontology of the Upper Triassic Dockum Group. Journal of the Arizona-Nevada Academy of Science 22:7-84 [M. Carrano/M. Carrano]
12932ETE P. A. Murry. 1989. Geology and paleontology of the Dockum Formation (Upper Triassic), west Texas and eastern New Mexico. In S. G. Lucas and A. P. Hunt (eds.), Dawn of the Age of Dinosaurs in the American Southwest, New Mexico Museum of Natural History, Albuquerque 102-144 [M. Carrano/M. Carrano/M. Carrano]
58720 P. A. Murry and R. A. Long. 1997. Dockum Group. In P. J. Currie & K. Padian (ed.), Encyclopedia of Dinosaurs 191-193 [M. Carrano/M. Carrano]
30105 S. J. Nesbitt, R. B. Irmis, W. G. Parker, N. D. Smith, A. H. Turner and T. Rowe. 2009. Hindlimb osteology and distribution of basal dinosauromorphs from the Late Triassic of North America. Journal of Vertebrate Paleontology 29(2):498-516 [R. Butler/R. Butler/M. Carrano]
32231 S. J. Nesbitt, C. A. Sidor, R. B. Irmis, K. D. Angielczyk, R. M. H. Smith and L. A. Tsuji. 2010. Ecologically distinct dinosaurian sister group shows early diversification of Ornithodira. Nature 464:95-98 [J. Alroy/J. Alroy]
60774 W. G. Parker. 2016. Revised phylogenetic analysis of the Aetosauria (Archosauria: Pseudosuchia); assessing the effects of incongruent morphological character sets. PeerJ 4:e1583 [R. Butler/R. Butler]
37120 H. J. Sawin. 1944. Amphibians from the Dockum Triassic of Howard County, Texas. Contributions to Geology, The University of Texas 4401:361-399 [M. Carrano/M. Carrano]
43405 H. J. Sawin. 1947. The pseudosuchian reptile Typothorax meadei. Journal of Paleontology 21:201-238 [R. Butler/R. Butler]
71494 E. H. Sellards. 1941. Final report covering the period from March 4, 1939 ro September 30, 1941 for the state-wide paleontologic-mineralogic survey in Texas. A Federal Works Agency Work Projects Administration Project iii-85 [M. Carrano/M. Carrano]
43418 J. A. Spielmann, S. G. Lucas, L. F. Rinehart and A. B. Heckert. 2008. The Late Triassic archosauromorph Trilophosaurus. New Mexico Museum of Natural History and Science Bulletin 43:1-177 [R. Butler/R. Butler]
60795 M. R. Stocker, S. J. Nesbitt, K. E. Criswell, W. G. Parker, L. M. Witmer, T. B. Rowe, R. Ridgely and M. A. Brown. 2016. A Dome-Headed Stem Archosaur Exemplifies Convergence among Dinosaurs and Their Distant Relatives. Current Biology 26(19):2674-2680 [R. Butler/R. Butler]
82173 K. H. T. To, S. Nesbitt, and M. R. Stocker. 2022. An early-diverging crocodylomorph from the early Norian (Late Triassic) of Texas demonstrates a wide distribution of early members across low-latitude Pangea. Journal of Vertebrate Paleontology e2075752 [P. Mannion/P. Mannion]