Fort Crittenden Formation

The Fort Crittenden Formation is a geological formation in Arizona whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.[1]

Fort Crittenden Formation
Stratigraphic range: Late Cretaceous
TypeGeological formation
UnderliesSalero Formation
Location
RegionNorth America
CountryUnited States

Vertebrate paleofauna

Amphibians

Amphibians of the Fort Crittenden Formation
Genus Species Location Stratigraphic position Abundance Notes

Opisthotriton

Indeterminate

Scapherpeton

Indeterminate

Archosaurs

Archosaurs of the Fort Crittenden Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Alligatoridae

Indeterminate

Known only from a single scute.

Paleontologists Robert M. Sullivan and Spencer G. Lucas questioned the referral to this specimen to Allognathosuchus in the formation because the referred remains were so scant and Allognathosuchus is confined to the Paleogene. They regarded the referred scute as belonging to an indeterminate alligatoroid.

Hadrosauridae[1][2]

Indeterminate[1]

Crittendenceratops

C. krzyzanowskii[3]

A centrosaurine ceratopsid.

cf. Richardoestesia

Indeterminate

Dromaeosauridae

Indeterminate

Bony fishes

Bony fishes of the Fort Crittenden Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Melvius

Indeterminate

Pachyrhizodus

Indeterminate

Cartilaginous fishes

Cartilaginous fishes of the Fort Crittenden Formation
Genus Species Location Stratigraphic position Abundance Notes

Myledaphus

M. bipartitus

Lepidosaurs

Teiid and anguid lizards are known from the formation.

Turtles

Turtles of the Fort Crittenden Formation
Genus Species Location Stratigraphic position Abundance Notes

Adocus

Aspideretes

Basilemys

Plastomenus

See also

Footnotes

  1. Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. pp. 574–88. ISBN 0520242092.
  2. D’Emic, M.D., Wilson, J.A., and Thompson, R. 2010. "The end of the sauropod dinosaur hiatus in North America". Palaeogeography, Palaeoclimatology, Palaeoecology 297: 486–90.
  3. Sebastian G. Dalman; John-Paul M. Hodnett; Asher J. Lichtig; Spencer G. Lucas (2018). "A new ceratopsid dinosaur (Centrosaurinae: Nasutoceratopsini) from the Fort Crittenden Formation, Upper Cretaceous (Campanian) of Arizona". New Mexico Museum of Natural History and Science Bulletin. 79: 141–64.

References


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