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Peraceras profectum

Mammalia - Perissodactyla - Rhinocerotidae

Taxonomy
Aceratherium profectum was named by Matthew (1899). Its type locality is Martin Canyon Quarry A, which is in a Hemingfordian channel horizon in the Pawnee Creek Formation of Colorado.

It was recombined as Aphelops profectus by Matthew (1901), Osborn (1904) and Galbreath (1953); it was recombined as Peraceras profectum by Prothero and Manning (1987) and Prothero (2005).

Synonyms
Synonymy list
YearName and author
1899Aceratherium profectum Matthew
1901Aphelops profectus Matthew
1903Aphelops ceratorhinus Douglass
1904Aphelops profectus Osborn
1904Aphelops brachyodus Osborn p. 322 fig. 19
1908Aphelops montanus Douglass p. 256 figs. PLATE LXIII
1908Aphelops ceratorhinus Douglass p. 260
1953Aphelops profectus Galbreath
1977Diceratherium jamberi Tanner
1987Peraceras profectum Prothero and Manning
2005Peraceras profectum Prothero p. 84

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
RankNameAuthor
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
orderPerissodactyla()
Tapiromorpha(Haeckel 1873)
Ceratomorpha(Wood 1937)
superfamilyRhinocerotoidea
familyRhinocerotidae
subfamilyAceratheriinaeDollo 1885
genusPeraceras
speciesprofectum(Matthew 1899)

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.

Diagnosis
ReferenceDiagnosis
E. Douglass 1908 (Aphelops montanus)Skull long (dolichocephalic); supraorbital region nol broad; nasals long and tapering, not laterally compressed and not possessing horn-rugosities; posttympanic rounded, not wing-like as in Aphelops ceratorhinus; teeth brachydont or brachyhypsodont; number of premolars complete (4); all the upper cheek teeth except P1 having crotchets, and all except M1 and M2 with antecrochets; limbs long and slender for so large a rhinoceros.