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Procranioceras skinneri

Osteichthyes - Dromomerycidae

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), 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
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
RankNameAuthor
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
—Ruminantiamorpha
—Ruminantia(Scopoli 1777)
—Pecora()
superfamilyCervoidea
familyDromomerycidaeFrick 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).
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: browserf
Reproduction: viviparoussubc
Created: 2005-08-31 14:50:18
Modified: 2005-08-31 16:50:18
Source: f = family, o = order, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Hendy et al. 2009, Janis and Manning 1998, Nowak 1999, Carroll 1988

Age range: base of the Barstovian to the top of the Clarendonian or 16.30000 to 9.40000 Ma

Collections (20 total)


Time interval Ma Country or state Original ID and collection number
Barstovian16.3 - 12.5Canada (Saskatchewan) Cranioceras skinneri (18758 18765 18769 18774 18785 18786 18787 18797)
Barstovian16.3 - 12.5USA (Nebraska) Cranioceras skinneri (18121 18123 type locality: 18124 18164 18192 18206 18209 18275 18442 18443)
Barstovian - Clarendonian16.3 - 9.4USA (Nebraska) Cranioceras skinneri (18235)
Tortonian11.63 - 7.246USA (Florida) Procranioceras skinneri (18509)