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Achelousaurus horneri

Reptilia - Ceratopsidae

Taxonomy
Achelousaurus horneri was named by Sampson (1994). It is not extant. Its type specimen is MOR 485. Its type locality is Landslide Butte Field Area (MOR TM-060), which is in a Campanian terrestrial siltstone in the Two Medicine Formation of Montana.

Synonymy list
YearName and author
1994Achelousaurus horneri Sampson p. 44A
1995Achelousaurus horneri Sampson
1997Achelousaurus horneri Vickaryous and Ryan p. 492
2001Achaelousaurus horneri Horner et al. p. 9
2001Achelousaurus horneri Trexler p. 303
2004Achelousaurus horneri Dodson et al. p. 495
2008Achelousaurus horneri Currie et al. p. 18
2009Achelousaurus horneri Hieronymus et al. p. 1371
2010Achelousaurus horneri Longrich p. 692 fig. 10
2010Achelousaurus horneri McDonald and Horner p. 156
2011Achelousaurus horneri Farke et al. p. 699
2011Achelousaurus horneri McDonald p. 1
2018Achelousaurus horneri Delcourt p. 9

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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
—Pachyrhinosaurini
genusAchelousaurus
specieshorneri

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.

†Achelousaurus horneri Sampson 1994
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Diagnosis
No diagnoses are available
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: base of the Late/Upper Campanian to the top of the Campanian or 83.50000 to 72.10000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Campanian83.6 - 72.1USA (Montana) Achelousaurus horneri (22652)
Late/Upper Campanian83.5 - 70.6USA (Montana) Achelousaurus horneri (type locality: 52435)