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Greenwood Canyon, Montague County, Texas, USA

Lat/Long (Decimal)	33.5002,-97.5827
Co-ordinates Derivation	estimated from map
Given Location	Texas, United States
Mindat.org Region (for given coordinates)	Montague County, Texas, USA

Collections

Collection	Reference	Stratigraphic Name	Comments	Lithology	Age
Greenwood Canyon	Jacobs L. L., Winkler D. A. (1998)	Trinity - Antlers		"siliciclastic"	113 - 100.5 Ma Early/Lower Cretaceous

Recorded Fossils

Accepted Name	Hierarchy	Age
Lepidotes sp. genus	Animalia : Chordata : Actinopterygii : Lepisosteiformes : *Lepidotes*	113 - 100.5 Ma Early/Lower Cretaceous
Hybodus butleri species	Animalia : Chordata : Chondrichthyes : Hybodontiformes : Hybodontidae : Hybodus : *Hybodus butleri*	113 - 100.5 Ma Early/Lower Cretaceous
Lonchidion anitae species	Animalia : Chordata : Chondrichthyes : Hybodontiformes : Lonchidiidae : Lonchidion : *Lonchidion anitae*	113 - 100.5 Ma Early/Lower Cretaceous
Tribosphenida subclass	Animalia : Chordata : Mammalia : Tribosphenida	113 - 100.5 Ma Early/Lower Cretaceous
Oklatheridium sp. genus	Animalia : Chordata : Mammalia : Deltatheridiidae : *Oklatheridium*	113 - 100.5 Ma Early/Lower Cretaceous
Oklatheridium minax species	Animalia : Chordata : Mammalia : Deltatheridiidae : Oklatheridium : *Oklatheridium minax*	113 - 100.5 Ma Early/Lower Cretaceous
Oklatheridium szalayi species	Animalia : Chordata : Mammalia : Deltatheridiidae : Oklatheridium : *Oklatheridium szalayi*	113 - 100.5 Ma Early/Lower Cretaceous
Astroconodon denisoni species	Animalia : Chordata : Mammalia : Triconodontidae : Astroconodon : *Astroconodon denisoni*	113 - 100.5 Ma Early/Lower Cretaceous
Adinodon pattersoni species	Animalia : Chordata : Mammalia : Didelphimorphia : Sparassocynidae : Adinodon : *Adinodon pattersoni*	113 - 100.5 Ma Early/Lower Cretaceous
Paracimexomys sp. genus	Animalia : Chordata : Mammalia : Taeniolabidae : *Paracimexomys*	113 - 100.5 Ma Early/Lower Cretaceous
Holoclemensia texana species	Animalia : Chordata : Mammalia : Holoclemensiidae : Holoclemensia : *Clemensia texana*	113 - 100.5 Ma Early/Lower Cretaceous
Kermackia texana species	Animalia : Chordata : Mammalia : Kermackiidae : Kermackia : *Kermackia texana*	113 - 100.5 Ma Early/Lower Cretaceous
Pappotherium pattersoni species	Animalia : Chordata : Mammalia : Pappotheriidae : Pappotherium : *Pappotherium pattersoni*	113 - 100.5 Ma Early/Lower Cretaceous
Spalacotheroides bridwelli species	Animalia : Chordata : Mammalia : Spalacotheriidae : Spalacotheroides : *Spalacotheroides bridwelli*	113 - 100.5 Ma Early/Lower Cretaceous
Tenontosaurus sp. genus	Animalia : Chordata : Reptilia : Dinosauria : *Tenontosaurus*	113 - 100.5 Ma Early/Lower Cretaceous
Anura order	Animalia : Chordata : Osteichthyes : Eobatrachus : Anura	113 - 100.5 Ma Early/Lower Cretaceous
Prosiren elinorae species	Animalia : Chordata : Osteichthyes : Caudata : Prosirenidae : Prosiren : *Prosiren elinorae*	113 - 100.5 Ma Early/Lower Cretaceous
Albanerpeton arthridion species	Animalia : Chordata : Amphibia : Gymnophiona : Albanerpetontidae : Albanerpeton : *Albanerpeton arthridion*	113 - 100.5 Ma Early/Lower Cretaceous
Wannchampsus sp. genus	Animalia : Chordata : Reptilia : Crocodylia : Paralligatoridae : *Wannchampsus*	113 - 100.5 Ma Early/Lower Cretaceous
Pterosauria order	Animalia : Chordata : Reptilia : Pterosauria	113 - 100.5 Ma Early/Lower Cretaceous
Lacertilia suborder	Animalia : Chordata : Reptilia : Squamata : Lacertilia	113 - 100.5 Ma Early/Lower Cretaceous
Naomichelys sp. genus	Animalia : Chordata : Reptilia : Testudines : Solemydidae : *Naomichelys*	113 - 100.5 Ma Early/Lower Cretaceous
Dromaeosauridae family	Animalia : Chordata : Reptilia : Dinosauria : Dromaeosauridae	113 - 100.5 Ma Early/Lower Cretaceous
Deinodontidae family	Animalia : Chordata : Saurischia : Deinodontidae	113 - 100.5 Ma Early/Lower Cretaceous
Macronaria unranked clade	Animalia : Chordata : Saurischia : Astrodon : Macronaria	113 - 100.5 Ma Early/Lower Cretaceous
Theropoda unranked clade	Animalia : Chordata : Saurischia : Theropoda	113 - 100.5 Ma Early/Lower Cretaceous

References

Zangerl R., Denison R. H. (1950) Discovery of Early Cretaceous mammals and frogs in Texas, Science 112, 61

Patterson B. (1955) A symmetrodont from the Early Cretaceous of northern Texas, Fieldiana: Zoology 37, 689-693

Thurmond J. T. (1974) Lower vertebrate faunas of the Trinity Division on north-central Texas, Aspects of Trinity Division Geology. A Symposium on the Stratigraphy, Sedimentary Environments, and Fauna of the Comanche Cretaceous Trinity Division (Aptian and Albian) of Texas and Northern Mexico. Geoscience and Man 8, 103-129

Langston W. (1974) Nonmammalian Comanchean tetrapods, Aspects of Trinity Division Geology. A Symposium on the Stratigraphy, Sedimentary Environments, and Fauna of the Comanche Cretaceous Trinity Division (Aptian and Albian) of Texas and Northern Mexico. Geoscience and Man 8, 77-102

Winkler D. A., Murry P. A., et al (1990) Early Cretaceous (Comanchean) vertebrates of central Texas, Journal of Vertebrate Paleontology 10 1, 95-116

Jacobs L. L., Winkler D. A. (1998) Mammals, archosaurs, and the Early to Late Cretaceous terrestrial transition in north-central Texas, In Y. Tomida, L. J. Flynn, & L. L. Jacobs (eds.), Advances in Vertebrate Paleontology and Geochronology. National Science Museum Monographs 14, 253-280

Gardner J. D. (1999) The amphibian Albanerpeton arthridion and the Aptian-Albian biogeography of albanerpetonids, Palaeontology 42 3, 529-544

Davis B. M., Cifelli R. L. (2011) Reappraisal of the tribosphenidan mammals from the Trinity Group (Aptian-Albian) of Texas and Oklahoma, Acta Palaeontologica Polonica 56 3, 441-462

Adams T. L. (2014) Small crocodyliform from the Lower Cretaceous (late Aptian) of central Texas and its systematic relationship to the evolution of Eusuchia, Journal of Paleontology 88 5, 1031-1049 doi:10.1666/12-089

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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