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Plesiocolopirus hancocki

Mammalia - Perissodactyla - Tapiridae

Taxonomy
Colodon hancocki was named by Radinsky (1963). Its type specimen is UOMNH 20377, a partial skull (anterior part of a skull with left P1'-M3), and it is a 3D body fossil.

It was recombined as Protapirus hancocki by Hanson (1996) and Colbert and Schoch (1998); it was recombined as Plesiocolopirus hancocki by Schoch (1989), Albright (1998) and Holbrook (1999).

Synonymy list
YearName and author
1963Colodon hancocki Radinsky p. 67
1989Plesiocolopirus hancocki Schoch
1996Protapirus hancocki Hanson
1998Plesiocolopirus hancocki Albright p. 214
1998Protapirus hancocki Colbert and Schoch
1999Plesiocolopirus hancocki Holbrook

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
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)
superfamilyTapiroideaGill 1872
familyTapiridae
genusPlesiocolopirus
specieshancocki()

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
L. B. Radinsky 1963Medium-sized helaletids: length M " = 44.4 mm. Small canines present. P
24
narrow with only a cingulum lingually. P " relatively short and wide, but barely submolar-
iform, with at most only a shallow anterolingual groove indicating incipient separation of 12
protocone and hypocone; metaloph slightly less prominent than protoloph. M " meta- cones shortened and lingually displaced, but convex labially. P2 relatively short but with- out entoconid. P3.4 with small entoconids. See Table 12 for measurements