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Procranioceras skinneri

Mammalia - Palaeomerycidae

Taxonomy
Cranioceras (Procranioceras) skinneri was named by Frick (1937) [type of subgenus Procranioceras, recognized by Webb 1969 but not raised to genus level by him]. It is a 3D body fossil. Its type locality is Devil's Gulch Horse Quarry, which is in a Barstovian terrestrial horizon in the Valentine Formation of Nebraska. It is the type species of Cranioceras (Procranioceras).

It was recombined as Procranioceras skinneri by Janis and Manning (1998), Prothero and Liter (2007) and Prothero and Liter (2008).

Synonymy list
YearName and author
1937Cranioceras (Procranioceras) skinneri Frick
1998Procranioceras skinneri Janis and Manning
2007Procranioceras skinneri Prothero and Liter p. 247
2008Procranioceras skinneri Prothero and Liter

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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
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Theriamorpha(Rowe 1993)
RankNameAuthor
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
—Ruminantiamorpha
—Ruminantia(Scopoli 1777)
—Pecora()
superfamilyCervoidea
familyPalaeomerycidaeLydekker 1883
subfamilyDromomerycinae(Frick 1937)
tribeCranioceratiniFrick 1937
genusProcranioceras(Frick 1937)
speciesskinneri()

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.

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Diagnosis
ReferenceDiagnosis
D. R. Prothero and M. R. Liter 2008Differs from Cranioceras in having a shorter occipi- tal horn, which is transversely flattened and anteriorly curved. Both the occipital and supraorbital horns are much longer than those of Bouromeryx. The premolars are larger than those in Cranioceras, but the anterior fossette on p4 tends to be open. Molars more brachyodont, usually with the Palaeomeryx fold (modified from Janis and Manning, 1998, p. 485).