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Odobenocetops

Mammalia - Cetacea - Odobenocetopsidae

Synonymy list
YearName and author
1993Odobenocetops Muizon pp. 746-747 figs. 1, 3
1997Odobenocetops McKenna and Bell p. 389
1999Odobenocetops Muizon et al. p. 450
2001Odobenocetops Fordyce and de Muizon p. 179
2002Odobenocetops Muizon p. 224
2002Odobenocetops Muizon and Domning p. 424
2014Odobenocetops Murakami et al. p. 502 figs. Figure 7
2016Odobenocetops Marx et al. p. 137
2017Odobenocetops Berta p. 165

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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
RankNameAuthor
classMammalia
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Artiodactylamorpha
Artiodactyla()
Whippomorpha
orderCetacea
Pelagiceti
Neoceti
suborderOdontoceti
infraorderDelphinida
superfamilyDelphinoidea
familyOdobenocetopsidae
genusOdobenocetops

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.

G. †Odobenocetops Muizon 1993
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Odobenocetops leptodon Muizon et al. 1999
Odobenocetops peruvianus Muizon 1993
Diagnosis
ReferenceDiagnosis
C. d. Muizon and D. P. Domning 2002Delphinoid cetacean which does not possess the elongated rostrum present in all other cetaceans. The rostrum is short, rounded, and blunt; it is formed by the premaxillae which are greatly enlarged and have large, asymmetrical ventral alveo- lar sheaths holding sexually dimorphic tusks. The right tusk of the male is large and can reach one metre or more in length. It is cylindrical and its section is mediolaterally compressed (the long axis measures c. 4–5 cm). The left tusk of the male was only between 20 and 25cm long, of which a few cm were erupted. Its section is also mediolaterally compressed. Both tusks are straight. In the female, the right tusk is only slightly larger than the left and both protruded only a few cm from the gum. Premaxillary sheaths and tusks form an angle of approximately 60–70° with the dorsal plane of the skull. The bony nares have been displaced anteriorly and are anteroposteriorly elongated. The palate is very deep and arched, and its anterior border (which is formed by the anterior edges of the alveolar sheaths) is U- to V-shaped. On the palate the vomer is very large and the premaxillae and the pterygoids are in contact with it. The maxillae have been excluded from the palate and relegated to a small triangular area on the lateral side of the rostrum and an elon- gated strip on the dorsal face of the skull. The postor- bital processes are large and lateral to the posterior end of the nares. The orbits face anterolaterally and dorsally. The portions of the frontals and maxillae which cover the temporal fossae in the other odonto- cetes have been reduced and narrowed in such a way that the temporal fossae are opened dorsally. Ven- trally, the crest of the hamular processe of the ptery- goid is strong and rounded and the choanae are very wide. The basioccipital is extremely wide and long. The glenoid cavity of the squamosal is an anteropos- teriorly elongated groove. The occipital condyles are very salient and more convex than in any other Pliocene or living cetacean.
Measurements
No measurements are available
Composition: hydroxyapatitesubo
Form: roller-shapedo
Ontogeny: modification of partso
Environment: marine, freshwatersubo
Locomotion: actively mobileo
Life habit: aquatico
Depth habitat: surfaceo
Diet: carnivoresubo
Reproduction: viviparoussubo
Created: 2005-03-06 14:21:39
Modified: 2005-09-22 15:42:08
Source: subo = suborder, o = order
Reference: Uhen 2004

Age range: Messinian or 7.24600 to 5.33300 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Tortonian - Messinian11.63 - 5.333Peru O. leptodon (46083)
Messinian7.246 - 5.333Peru O. peruvianus, O. leptodon (13079)
Messinian7.246 - 5.333Chile O. sp. (154642)