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Numataphocoena yamashitai
Taxonomy
Numataphocoena yamashitai was named by Ichishima and Kimura (2000) [Numata Fossil Laboratory, Hokkaido, Japan]. Its type specimen is NFL 7, a skull, and it is a 3D body fossil. Its type locality is Numata Town, Pliocene, which is in a Zanclean marine sandstone/tuff in the Horokaoshirarika Formation of Japan.
Synonymy list
| Year | Name and author |
|---|---|
| 2000 | Numataphocoena yamashitai Ichishima and Kimura pp. 562-572 figs. 3-13 |
| 2006 | Numataphocoena yamashitai Fajardo-Mellor et al. p. 912 |
| 2016 | Numataphocoena yamashitai Tanaka and Ichishima p. 3 |
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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.
†Numataphocoena yamashitai Ichishima and Kimura 2000
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Y. Tanaka and H. Ichishima 2016 | Numataphocoena yamashitai differs from other phocoenids in having a raised area along an extended sulcus from the medial border of the posterior dorsal infraorbital foramen on the dorsal surface of the maxilla, the maxillary terrace (new term, see Discussion); narrower and sharper anterior part of the internal acoustic meatus; and a robust anterior process of the periotic. Numataphocoena yamashitai differs from later branching phocoenids (such as Lomacetus, Piscolithax spp, extant species) in absence of the maxillary crest (Character 28), and wide premaxillae against the maxillae at the level of the postorbital process (Character 35).
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