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Tatankaceratops sacrisonorum

Reptilia - Ceratopsidae

Taxonomy
Tatankaceratops sacrisonorum was named by Ott and Larson (2010). Its type specimen is BHI-6226, a partial skeleton, and it is a 3D body fossil. Its type locality is Niemi Ranch, which is in a Maastrichtian crevasse splay mudstone in the Hell Creek Formation of South Dakota. It is the type species of Tatankaceratops.

Synonymy list
YearName and author
2010Tatankaceratops sacrisonorum Ott and Larson pp. 205-206 figs. 14.1-14.17
2011Tatankaceratops sacrisonorum Maidment and Barrett p. 3
2012Tatankaceratops sacrisonorum Longrich and Field p. 4
2014Tatankaceratops sacrisonorum Longrich p. 302

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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
subfamilyChasmosaurinae
—Triceratopsini
genusTatankaceratops
speciessacrisonorum

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.

†Tatankaceratops sacrisonorum Ott and Larson 2010
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Diagnosis
ReferenceDiagnosis
C. J. Ott and P. L. Larson 2010The new species is distinguishable from other late Maastrichtian ceratopsids based on its small adult size, lack of development of cornual sinuses, proportionally massive horncore, nasal horn the same length as post-orbital horns, nasal horncore recurved, proportionally large orbit compared to skull size, origination of postorbital horncores caudal to the orbit, no overlap of orbit by postorbital horncore, and no evidence of epijugal ossifications.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yesg
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: 2005-08-25 05:45:07
Modified: 2005-08-25 07:45:07
Source: g = genus, subo = suborder, o = order
References: Norman and Weishampel 1991, Peczkis 1995, Marsh 1875

Age range: Late/Upper Maastrichtian or 70.60000 to 66.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Late/Upper Maastrichtian70.6 - 66.0USA (South Dakota) Tatankaceratops sacrisonorum (type locality: 97798)