''Crittendenceratops'' (meaning "horned face from the Fort Crittenden Formation") is a genus of horned centrosaurine

ceratopsid Ceratopsidae (sometimes spelled Ceratopidae) is a family of ceratopsian dinosaurs including ''Triceratops'', '' Centrosaurus'', and '' Styracosaurus''. All known species were quadrupedal herbivores from the Upper Cretaceous. All but one species are ...

dinosaur from the late

Campanian The Campanian is the fifth of six ages of the Late Cretaceous epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campa ...

Fort Crittenden Formation of

Arizona Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...

. It contains a single species, ''C. krzyzanowskii'', and represents the first species of dinosaur from the Fort Crittenden Formation to receive a formal scientific name.

Description

''Crittendenceratops'' is distinguished by forward-curving, hook-like flanges located along the central portion of the top of the frill, "extensive" epiparietals located along the sides of the parietal portion of the frill, a thickening of the frill in the parietal portion, and a short, pronounced ridge on the surface of the

squamosal The squamosal is a skull bone found in most reptiles, amphibians, and birds. In fishes, it is also called the pterotic bone. In most tetrapods, the squamosal and quadratojugal bones form the cheek series of the skull. The bone forms an ancestra ...

portion of the frill.

Classification

''Crittendenceratops'' was assigned to the

Nasutoceratopsini Centrosaurinae (from the Greek, meaning "pointed lizards") is a subfamily of ceratopsid, a group of large quadrupedal ornithischian dinosaur. Centrosaurine fossil remains are known primarily from the northern region of Laramidia (modern day Alber ...

(which also includes ''Avaceratops'', ''Nasutoceratops'', and ''Yehuecauhceratops''), a tribe of the ceratopsid subfamily Centrosaurinae, by Dalman ''et al.'' (2018). The cladogram below follows their phylogenetic analysis:

References

{{Taxonbar, from=Q58179217 Centrosaurinae Dinosaur genera Campanian dinosaurs Taxa named by Spencer G. Lucas Fossil taxa described in 2018 Dinosaurs of the United States

Description

Classification

See also

References