Otis Chalk Quarry 1, SMU 122, TMM 31025 (Triassic of the United States)

Also known as Trilophosaurus Quarry 1, NMMNH L-860, WPA, Work Project No. 13352

Where: Howard County, Texas (32.2° N, 101.2° W: paleocoordinates 6.9° N, 41.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Colorado City Formation (Dockum Group), Norian (228.0 - 208.5 Ma)

• variously referred to the Iatan or Colorado City of the Dockum Group; low in formation; lower level than Quarry 1

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; concretionary, green, red, yellow, blue mudstone and paleosol/pedogenic, calcareous mudstone

• "an overbank or crevasse splay deposit...[in] a floodplain environment that experienced moderate pedogenic modification"
• "red, green, purple and yellowish smectitic mudstones with minor concretions encrusting many of the bones"

Size classes: macrofossils, mesofossils

Collected by WPA in 1939–1941; reposited in the NMMNH, TMM

Collection methods: bulk, quarrying, surface (float), surface (in situ), mechanical, sieve,

Primary reference: 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]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 22704: authorized by Anna Behrensmeyer, entered by Anna Behrensmeyer on 29.05.2001, edited by Matthew Carrano and Richard Butler

Creative Commons license: CC BY (attribution)

Taxonomic list

• 1940 report: "To date the fauna has resisted all efforts at Identification, and beyond the statement that probably all the fauna is at least rare or mostly undescribed, nothing can be said."
Chondrichthyes
 Hybodontiformes -
Hybodontoidea indet.3 Zangerl 1981 elasmobranch
NMMNH P-34043
? Lissodus sp.6 Brough 1935 elasmobranch
SMU 69650, tooth
Gnathostomata
  -
Osteichthyes indet.3 bony fish
NMMNH P-34037, 34044, 34220
Actinopterygii indet.3 ray-finned fish
NMMNH P-34023, 34040, 41426, 41427
Actinopteri
 Palaeonisciformes - Palaeoniscidae
aff. Palaeoniscidae indet.3 Vogt 1852
NMMNH P-34046
aff. Turseodus sp.3 Leidy 1857
NMMNH P-34038
 Palaeonisciformes - Redfieldiidae
Redfieldiidae indet.3 Hutchinson 1973
NMMNH P-34039, 41338, 40699, 40700, 41357
Osteichthyes
 Dipnoi - Arganodontidae
? Arganodus sp.3 Martin 1979 lungfish
Coelacanthimorpha
 Coelacanthiformes - Coelacanthidae
? Coelacanthidae indet.3 Agassiz 1843 coelacanth
NMMNH P-34045
Osteichthyes
 Tetrapoda -
Tetrapoda indet.3 Jaekel 1911 tetrapod
NMMNH P-34052, 34053, 34063-65, 34068, 34071-72
 Temnospondyli - Metoposauridae
Metoposauridae indet.3, "Buettneria howardensis" = Koskinonodon perfectus8
Metoposauridae indet.3 Watson 1919 tetrapod
NMMNH P-34034
"Buettneria howardensis" = Koskinonodon perfectus8 Case 1922 tetrapod
TMM 31025-6, 8, 11
 Temnospondyli - Almasauridae
Latiscopus disjunctus n. gen. n. sp.10
Latiscopus disjunctus n. gen. n. sp.10 Wilson 1948 tetrapod
UT-BEG 31025-182
Reptilia
  -
Reptilia indet.3 Laurenti 1768 reptile
NMMNH P-34024-31, 34047-79, 34062, 34066, 34144-46, 34222, 34233, 41428-34
 Eosuchia -
Archosauromorpha indet.3 Huene 1946 archosauromorph
NMMNH P-34020, 34050, 34054
 Eosuchia - Rhynchosauridae
Otischalkia elderae n. gen. n. sp.4
Otischalkia elderae n. gen. n. sp.4 Hunt and Lucas 1991 rhynchosaur
TMM 31025-263 (holotype), 31025-262, humeri- TMM 31025-266, 31025-264, femora
 Eosuchia -
Trilophosaurus sp.1 Case 1928 archosauromorph
Hundreds of specimens - see Spielmann et al. (2008, p. 153) for a complete list
"Malerisaurus langstoni" = Trilophosaurus buettneri7 Case 1928 archosauromorph
Archosauriformes indet.3 Gauthier 1986 archosauromorph
Archosauriformes indet.2 Gauthier 1986 archosauromorph
NMMNH P-34011a-d, 34012, 34057-58, 41435-36, 41439, 34069
Archosauriformes indet.2 Gauthier 1986 archosauromorph
NMMNH P-34032
Archosauriformes indet.2 Gauthier 1986 archosauromorph
NMMNH P-41437, 34033, 41438
 Eosuchia - Doswelliidae
Doswellia sp.9 Weems 1980 archosauromorph
 Pseudosuchia -
"Lythrosuchus langstoni n. gen. n. sp." = Poposaurus langstoni5, ? Rauisuchia indet.3
"Lythrosuchus langstoni n. gen. n. sp." = Poposaurus langstoni5 Long and Murry 1995 archosaur
TMM 31025-12 (holotype), right ilium. TMM 31025-177, 257, 259. All specimens probably represent a single individual
? Rauisuchia indet.3 archosaur
NMMNH P-34015
 Phytosauria -
Phytosauria indet.5 Jaeger 1828 archosaur
TMM 31025-7, 9, 149, 152, 153, 180
 Phytosauria - Parasuchidae
"Phytosauridae indet." = Mystriosuchinae3, "Paleorhinus bransoni" = Parasuchus bransoni5
"Phytosauridae indet." = Mystriosuchinae3 von Huene 1915 archosaur
NMMNH P-34005, 29400, 34007-09
"Paleorhinus bransoni" = Parasuchus bransoni5 Williston 1904 archosaur
TMM 31025-172, skull
 Eosuchia -
Protecovasaurus lucasi3 Heckert 2004 archosauromorph
NMMNH P-34221
 Diapsida -
Prolacertiformes indet.3 archosauromorph
NMMNH P-34056; also called "aff. Tanytrachelos"