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Taxonomy
Kentriodontoidea was named by Slijper (1936) [Originally named by Slijper (1936) as a family. Elevated to superfamily rank by Guo & Kohno (2023).].
It was assigned to Delphinida by Guo and Kohno (2023).
It was assigned to Delphinida by Guo and Kohno (2023).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1936 | Kentriodontoidea Slijper |
| 2023 | Kentriodontoidea Guo and Kohno p. 4 |
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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.
Superfm. †Kentriodontoidea Slijper 1936
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Fm. †Lophocetidae Barnes 1978
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G. †Lophocetus Cope 1867
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†Lophocetus calvertensis Harlan 1842
†Lophocetus repenningi Barnes 1978
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Z. Guo and N. Kohno 2023 | It differs from other superfamilies of the Delphinida in having the following derived charac- ters: the premaxillae at anterior of the rostrum mediolaterally compressed (character 3), the mesorostral groove posteriorly constricted, anteriorly abruptly diverges at the level anterior to the nares and behind the level of the antorbital notch (character 7), the lacrimal or the jugal forms the dorsolateral edge of internal opening of the infraorbital foramen (character 56), the infratemporal crest forms a curved ridge (character 62), the dorsal margin of the mesethmoid low (character 104), the alisphenoid laterally exposed broadly in the temporal fossa (character 157), the basioccipital crests angle 15 ̊–40 ̊ in the ventral view (character 225), the hypoglossal foramen separated by a thick bone from the jugular foramen (charac- ter 227), the pars cochlearis ventrolaterally convex (character 278), the basihyal fused with the thyrohyal (character 326), and the transverse processes of lumbar vertebrae angle 45 ̊ or more (character 328). |
Measurements
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||
Age range: base of the Burdigalian to the top of the Early/Lower Clarendonian or 20.44000 to 9.40000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Burdigalian | Japan (Akita) | Platysvercus ugonis (229220) | |
| Early/Lower Clarendonian | USA (Florida) | Lophocetus sp. (45461) | |
| Tortonian | USA (Maryland) | Delphinus calvertensis (86500) Lophocetus calvertensis (219172) | |
| Tortonian | USA (California) | Lophocetus repenningi (46071) |