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Pterophocaena nishinoi
Taxonomy
Pterophocaena nishinoi was named by Murakami et al. (2012). Its type specimen is NMV-7, a partial skull (partial skull with right periotic), and it is a 3D body fossil. Its type locality is Homare 2 District, which is in a Tortonian marine mudstone in the Wakkanai Formation of Japan. It is the type species of Pterophocaena.
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Pterophocaena nishinoi Murakami et al. p. 1158 figs. Figs. 2-7 |
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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.
†Pterophocaena nishinoi Murakami et al. 2012
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Murakami et al. 2012 | A new species of phocoenid with a fossa for the ba- sisphenoidal sinus; parietals exposed in dorsal view; deep dorsal condyloid fossa; a ventrally bending posterior process of periotic; angle between posterior process of periotic and long axis of pars cochlearis <135◦. Differing from all phocoenids by: the absence of a premaxillary eminence; posterior half of the hamular process of the pterygoids not separated by palatines; a prominently dor- solaterally projecting premaxilla; premaxilla considerably over- hanging the maxilla and extending in line with the most lateral of the dorsal infraorbital foramen; a supraorbital process of the maxilla, steeply sloping ventrolaterally; a transversely straight- ened posterior margin of the ascending process of the maxilla in anterior view; a lateral suture line of the maxilla-frontal from the antorbital process to the postorbital process below the ventral limit of the rostrum in lateral view; a posteriorly protruding tem- poral crest; an anteroventrally narrowed and inverted teardrop- shaped temporal fossa; and several short ridges on the tympa- nosquamosal recess of the squamosal. |
Measurements
No measurements are available
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| Source: f = family, subo = suborder, o = order | |||||
| References: Nowak 1991, Uhen 2004 | |||||