Also known as Dockum Formation
Where: Crosby County, Texas (33.4° N, 101.2° W: paleocoordinates 8.1° N, 41.4° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Tecovas Formation (Chinle Group), Norian (228.0 - 208.5 Ma)
• "NMMNH locality 1430 is in the lower part of the Tecovas, 11.25 m above the base of the Dockum Formation."
• group of beds-level stratigraphic resolution
Environment/lithology: channel lag; micaceous, gray, green, silty sandstone and ferruginous, pebbly, peloidal, shelly/skeletal, red, yellow, calcareous conglomerate
Size classes: macrofossils, mesofossils
Preservation: coprolite
Reposited in the NMMNH
Collection methods: bulk, sieve,
• "More than three metric tons of sediment...were screenwashed."
Primary reference: S. G. Lucas and Z. Luo. 1993. Adelobasileus from the Upper Triassic of west Texas: the oldest mammal. Journal of Vertebrate Paleontology 13(3):309-334 [J. Alroy/M. Sommers/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 13266: authorized by John Alroy, entered by Robin Whatley on 05.02.2002, edited by Kaitlin Maguire, Matthew Carrano and Richard Butler
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
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Chondrichthyes | |
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Diplolonchidion murryi n. gen. n. sp.2
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Gnathostomata | |
Actinopterygii indet.2 ray-finned fish NMMNH P-26435, 26433, 26350-52, 26354, 26357-61, 26364-66, 26375, 34364-65, 34380, 34411, 41477-79, 41481-83
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Actinopteri | |
? Semionotidae indet.2 Woodward 1890 | |
Osteichthyes | |
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Coelacanthimorpha | |
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Amphibia | |
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Osteichthyes | |
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Adelobasileus cromptoni n. gen. n. sp.
Adelobasileus cromptoni n. gen. n. sp. Lucas and Hunt 1990 mammaliaform | |
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Reptilia | |
Reptilia indet.2 Laurenti 1768 reptile NMMNH P-25756, 26327, 26348, 26321, 26323-30, 26332-34, 26336-39, 26341, 26343, 26348, 26356, 26362-64, 34421, 34423, 41487-89
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Archosauromorpha indet.2, Archosauriformes "indet. J"2, Archosauriformes "indet. K"2, Archosauriformes "indet. L"2, Archosauriformes "indet. M"2, Archosauriformes "indet. Q"2, Archosauriformes "indet. R"2, Archosauriformes "indet. S"2, Archosauriformes "indet. H"2, Archosauriformes "indet. T"2, Archosauriformes indet.1, Archosauriformes indet.1, Archosauriformes indet.6, aff. Crosbysaurus harrisae2, Crosbysaurus harrisae2
Archosauriformes "indet. H"2 Gauthier 1986 archosauromorph NMMNH P-26344, 34368, 34370, 34416, 41713-14
Archosauriformes indet.1 Gauthier 1986 archosauromorph NMMNH P-26398, 26401-02, 26393, 34369, 34382, 34405, 34152, 34407, 34410
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"Phytosauridae indet." = Mystriosuchinae2
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Tecovasaurus murryi n. gen. n. sp.4, Protecovasaurus lucasi2, Trilophosaurus buettneri2, Trilophosaurus jacobsi3
Tecovasaurus murryi n. gen. n. sp.4 Hunt and Lucas 1994 archosauromorph NMMNH P-18192-93, 18196, 26415, 26417
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"aff. Clevosaurus latidens" = Fraserosphenodon latidens2
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Osteichthyes | |
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Bivalvia | |
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Deuteropoda | |
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Ostracoda | |
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unclassified | |
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