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Temporal range: Campanian, 73 Ma
Crittendenceratops shaded.jpg
Life reconstruction of C. kryzanowskii
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Ornithischia
Family: Ceratopsidae
Subfamily: Centrosaurinae
Tribe: Nasutoceratopsini
Genus: Crittendenceratops
Dalman et al., 2018
C. krzyzanowskii
Binomial name
Crittendenceratops krzyzanowskii
Dalman et al., 2018

Crittendenceratops (meaning "horned face from the Fort Crittenden Formation") is a genus of horned centrosaurine ceratopsid dinosaur from the Late Cretaceous of Arizona. It contains a single species, C. krzyzanowskii.


Size of Crittendenceratops compared to a human

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 portion of the frill.[1]


Crittendenceratops was assigned to the Nasutoceratopsini (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:[1]

Diabloceratops eatoni


Yehuecauhceratops mudei

Nasutoceratops titusi

Avaceratops lammersi

MOR 692

CMN 8804

Crittendenceratops krzyzanowskii

'Malta centrosaurine'

Albertaceratops nesmoi

Medusaceratops lokii

Sinoceratops zhuchengensis

Wendiceratops pinhornensis

Machairoceratops cronusi


Einiosaurus procurvicornis

Achelousaurus horneri

Pachyrhinosaurus perotorum

Pachyrhinosaurus lakustai

Pachyrhinosaurus canadensis


Coronosaurus brinkmani

Xenoceratops foremostensis

Spinops sternbergorum

Centrosaurus apertus

Rubeosaurus ovatus

Styracosaurus albertensis

See also[edit]


  1. ^ a b Dalman, Sebastian G.; Hodnett, John-Paul M.; Lichtig, Asher J.; Lucas, Spencer G. (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: 141–164.