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Odobenocetops
Taxonomy
Odobenocetops was named by Muizon (1993). It is not extant.
It was assigned to Delphinoidea by Muizon (1993); and to Odobenocetopsidae by McKenna and Bell (1997), Muizon et al. (1999), Fordyce and de Muizon (2001), Muizon and Domning (2002), Muizon (2002), Murakami et al. (2014), Marx et al. (2016), Berta (2017).
It was assigned to Delphinoidea by Muizon (1993); and to Odobenocetopsidae by McKenna and Bell (1997), Muizon et al. (1999), Fordyce and de Muizon (2001), Muizon and Domning (2002), Muizon (2002), Murakami et al. (2014), Marx et al. (2016), Berta (2017).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1993 | Odobenocetops Muizon pp. 746-747 figs. 1, 3 |
| 1997 | Odobenocetops McKenna and Bell p. 389 |
| 1999 | Odobenocetops Muizon et al. p. 450 |
| 2001 | Odobenocetops Fordyce and de Muizon p. 179 |
| 2002 | Odobenocetops Muizon p. 224 |
| 2002 | Odobenocetops Muizon and Domning p. 424 |
| 2014 | Odobenocetops Murakami et al. p. 502 figs. Figure 7 |
| 2016 | Odobenocetops Marx et al. p. 137 |
| 2017 | Odobenocetops Berta p. 165 |
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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
| Reference | Diagnosis | |
|---|---|---|
| C. d. Muizon and D. P. Domning 2002 | Delphinoid 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
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| 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 - Messinian | Peru | O. leptodon (46083) | |
| Messinian | Peru | O. peruvianus, O. leptodon (13079) | |
| Messinian | Chile | O. sp. (154642) |