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Dockum - Trujillo, Texas, USA

GroupDockum
FormationTrujillo
Age:237 - 209 Ma
Late/Upper Triassic
IntervalCarnian - Norian
Lithologysiltstone, conglomerate
Number of Collections2
Number of Occurrences10

Recorded Sample Locations

LocationRegionStratigraphic Name
Lower Sunday Canyon locality Randall County, Texas, USADockum - Trujillo
NMMNH L-3775Borden County, Texas, USADockum - Trujillo

Associated Units

Stratigraphic NameAgeLithologyOccurrence Records
Dockum - Tecovas228 - 209 Ma
Late/Upper Triassic
siltstone/conglomerate, claystone, mudstone, siltstone, "siliciclastic"124

Recorded Fossils

Accepted NameHierarchyAge
Semionotus sp.
genus
6Animalia : Chordata : Actinopteri : Semionotiformes : Semionotidae : Semionotus237 - 208.5 Ma
Late/Upper Triassic
Coelacanthidae
family
5Animalia : Chordata : Sarcopterygii : Coelacanthiformes : Coelacanthidae237 - 208.5 Ma
Late/Upper Triassic
Osteichthyes
unranked clade
99Animalia : Chordata : Osteichthyes237 - 208.5 Ma
Late/Upper Triassic
Reptilia
class
3Animalia : Chordata : Reptilia237 - 208.5 Ma
Late/Upper Triassic
Archosauriformes
unranked clade
99Animalia : Chordata : Reptilia : Eosuchia : Archosauriformes237 - 208.5 Ma
Late/Upper Triassic
Trilophosaurus jacobsi
species
7Animalia : Chordata : Reptilia : Trilophosauridae : Trilophosaurus : Trilophosaurus jacobsi237 - 208.5 Ma
Late/Upper Triassic
Mystriosuchinae
subfamily
5.3Animalia : Chordata : Reptilia : Eosuchia : Parasuchidae : Mystriosuchinae237 - 208.5 Ma
Late/Upper Triassic
Spinosuchus caseanus
species
7Animalia : Chordata : Reptilia : Trilophosauridae : Spinosuchus : Spinosuchus caseanus237 - 208.5 Ma
Late/Upper Triassic
Unionidae
family
5Animalia : Mollusca : Bivalvia : Unionida : Unionidae237 - 208.5 Ma
Late/Upper Triassic

References

Murry P. A. (1989) Geology and paleontology of the Dockum Formation (Upper Triassic), west Texas and eastern New Mexico, Dawn of the Age of Dinosaurs in the American Southwest, New Mexico Museum of Natural History, Albuquerque, 102-144
Heckert A. B., Lucas S. G., et al (2001) New occurrence of Trilophosaurus (Reptilia: Archosauromorpha) from the Upper Triassic of West Texas and its biochronological significance, New Mexico Geological Society Guidebook, 52nd Field Conference, Geology of the Llano Estacado, 115-122
Heckert A. B., Lucas S. G., et al (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
Spielmann J. A., Lucas S. G., et al (2009) Redescription of Spinosuchus caseanus (Archosauromorpha: Trilophosauridae) from the Upper Triassic of North America, Palaeodiversity 2, 283-313
Butler R. J. (2010) Taxonomic opinions on Archosauromorpha
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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