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Miophocaena nishinoi
Taxonomy
Miophocaena nishinoi was named by Murakami et al. (2012). Its type specimen is NMV-6, a partial skull (partial skull with left periotic), and it is a 3D body fossil. Its type locality is Kiyokawa Hidarimata Valley, which is in a Messinian marine mudstone in the Koetoi Formation of Japan. It is the type species of Miophocaena.
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Miophocaena nishinoi Murakami et al. p. 1173 figs. Figs. 2-5 |
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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.
†Miophocaena nishinoi Murakami et al. 2012
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Murakami et al. 2012 | Assigned to Phocoenidae based on presence of fossae for inferior vestibules, premaxillary eminences, and a frontal boss. Differs from all other phocoenids by presence of gently inclined vertex and dorsoventrally stout stylohyoid that does not bend ventrally. Differing from all phocoenids except Archaeophocaena by having right ascending process of premax- illa attached to right nasal, very wide premaxillae at position of premaxillary sac fossae, wide ascending processes of pre- maxillae, and narrow fossae for inferior vestibules. Differs from all phocoenids except Archaeophocaena and Haborophocoena spp. by having anteriorly diverging mesorostral groove at level of antorbital notch and ascending process of right premaxil- lae being much wider than its counterpart on the left. Differs from all phocoenids except Archaeophocaena, Haborophocoena spp., and Septemtriocetus bosselaersi by having low premaxil- lary eminences. Differs from all phocoenids except Archaeopho- caena, Haborophocoena spp., and Piscolithax tedfordi by having strongly left-skewed skull. Differs from all extinct phocoenids by having anteroposteriorly extended, narrow, additional postero- lateral sulci (medial to lateral edge of premaxillae). Differs from all extinct phocoenids except Archaeophocaena and Haboropho- coena toyoshimai in having anteromedial and posteromedial sulci unconnected to premaxillary foramina. Differs from Lomacetus, Phocoena spp., and Phocoenoides by having a well-developed an- torbital notch. Differs from Neophocoena, Phocoena phocoena, and Phocoenoides by having a massive, globular, anterior process of periotic. |
Measurements
No measurements are available
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| Source: f = family, subo = suborder, o = order | |||||
| References: Uhen 2004, Nowak 1991 | |||||