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Crittendenceratops krzyzanowskii

Reptilia - Ceratopsidae

Taxonomy
Crittendenceratops krzyzanowskii was named by Dalman et al. (2018). Its type specimen is NMMNH P-34906, a partial skull (incomplete right parietal and nearly complete left squamosal), and it is a 3D body fossil. Its type locality is NMMNH L-4669, Adobe Canyon, which is in a Campanian terrestrial mudstone/siltstone in the Fort Crittenden Formation of Arizona. It is the type species of Crittendenceratops.

Synonymy list
YearName and author
2018Crittendenceratops krzyzanowskii Dalman et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
RankNameAuthor
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Genasauria
—Cerapoda
—Marginocephalia
—Ceratopsia()
infraorderNeoceratopsia
—Coronosauria
superfamilyCeratopsoidea
familyCeratopsidae
subfamilyCentrosaurinae
—Nasutoceratopsini
genusCrittendenceratops
specieskrzyzanowskii

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Crittendenceratops krzyzanowskii Dalman et al. 2018
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Diagnosis
ReferenceDiagnosis
S. G. Dalman et al. 2018Centrosaurine ceratopsid characterized by the following unique combination of characters: forward-curving, hook-like flanges located along the dorsomedial margin of the parietal lateroposterior ramus; extensive epiparietals located along the lateroposterior margin of the parietal ramus; parietal ramus dorsoventrally thick; dorsal surface of the parietal ramus contains deep elongate fossa; posteroventrolateral concavity pronounced and extensively rugose; squamosal dorsal ridge short, pronounced and located in close proximity to dorsolateral margin of the bone.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: gregariouso
Environment: terrestrialsubo
Locomotion: actively mobileo
Life habit: ground dwellingsubo
Diet: herbivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2005-09-15 11:08:09
Modified: 2005-09-15 13:08:09
Source: subo = suborder, o = order
References: Marsh 1875, Norman and Weishampel 1991

Age range: Late/Upper Campanian or 83.50000 to 70.60000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian83.5 - 70.6USA (Arizona) Crittendenceratops krzyzanowskii, Centrosaurinae indet. (type locality: 68256)