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Regaliceratops peterhewsi

Reptilia - Ceratopsidae

Discussion

The holotype and only known specimen is Tyrrell Museum of Palaeontology (TMP) 2005.055.0001, a nearly complete cranium (skull excluding lower jaw) missing only the rostral bone. Palatal and braincase regions are obscured by matrix.

Taxonomy
Regaliceratops peterhewsi was named by Brown and Henderson (2015). Its type specimen is TMP 2005.055.0001, a skull, and it is a 3D body fossil. Its type locality is Waldron Flats, which is in a Maastrichtian terrestrial horizon in the St. Mary River Formation of Canada. It is the type species of Regaliceratops.

Synonymy list
YearName and author
2015Regaliceratops peterhewsi Brown and Henderson figs. 2-3

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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
RankNameAuthor
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Genasauria
—Cerapoda
—Marginocephalia
—Ceratopsia()
familyCeratopsidae
subfamilyChasmosaurinae
—Triceratopsini
genusRegaliceratops
speciespeterhewsi

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.

†Regaliceratops peterhewsi Brown and Henderson 2015
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Diagnosis
ReferenceDiagnosis
C. M. Brown and D. M. Henderson 2015Chasmosaurine ceratopsid characterized by the following autapomorphies (*) and unique suite of synapomorphies: single,midline epiparietal ossification (P0) rostrodorsally offset from plane of frill and other epiparietals, projecting caudal to parietal and with a roughly triangular transverse cross-section*; prominent midline ridge on parietal confluent with median epiparietal (P0 locus)*; paired epiparietal ossifications (P1-2) long, flat, and roughly pentagonal or spade shaped*; prominent postorbital ridge running diagonally from supraorbital horncore to base of squamosal; parietal fenestrae small or subequal in size to orbit (shared with Kosmoceratops); nasal horncore larger than postorbital horncores (shared with Chasmosaurus belli and Vagaceratops).
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: Early/Lower Maastrichtian or 70.60000 to 66.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Early/Lower Maastrichtian70.6 - 66.0Canada (Alberta) Regaliceratops peterhewsi (type locality: 191308)