Navajoceratops

Navajoceratops (meaning "Navajo horned face") is a genus of ceratopsid dinosaur from the late Cretaceous Period of what is now North America. The genus contains a single species, N. sullivani, named after Robert M. Sullivan, leader of the expeditions that recovered the holotype.[1]

Geological map of the southeast San Juan Basin; A (lower right) is where the holotype was found

Navajoceratops
Temporal range: Late Cretaceous, ~75.0–73.4 Ma
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Holotype parietals from the front and back
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: †Ornithischia
Family: †Ceratopsidae
Subfamily: †Chasmosaurinae
Genus: †Navajoceratops
Fowler and Freedman Fowler, 2020
Type species
†Navajoceratops sullivani
Fowler and Freedman Fowler, 2020

The holotype specimen, SMP VP-1500, collected in 2002, consists of a partial skull. It was discovered in the Campanian Hunter Wash Member of the Kirtland Formation, New Mexico.[1] It was informally named in 2016.[2]

Navajoceratops was a member of the Chasmosaurinae. Alongside fellow chasmosaurine Terminocavus, also from the Kirtland Formation and described in the same paper, Navajoceratops was found to represent a stratigraphic and morphological intermediate between Pentaceratops and Anchiceratops. Navajoceratops was also found to be marginally less derived than Terminocavus. [1]

Chasmosaurinae
 
 

Chasmosaurus

 
 
 

Vagaceratops

 
 

Kosmoceratops

 
 
 
 
 
 

Coahuilaceratops

 
 
 

Pentaceratops

 
 

Utahceratops

 
 
 
 
 

Navajoceratops

 
 
 

Terminocavus

 
 
 

Anchiceratops

 
 
 

Arrhinoceratops

 
 

Triceratopsini

 
 
 
 
 
 
 

See also

References
  1. Fowler, D.W.; Freedman Fowler, E.A. (2020). "Transitional evolutionary forms in chasmosaurine ceratopsid dinosaurs: evidence from the Campanian of New Mexico". PeerJ. 8: e9251. doi:10.7717/peerj.9251.
  2. Denver Warwick Fowler (April 2016). "Dinosaurs and time: chronostratigraphic frameworks and their utility in analysis of dinosaur paleobiology". scholarworks.montana.edu. Retrieved 17 February 2019.


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