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Aetiocetus cotylalveus
Taxonomy
Aetiocetus cotylalveus was named by Emlong (1966) [= OU 26351 = Emlong 218]. Its type specimen is USNM 25210, a partial skeleton (skull and partial skeleton), and it is a 3D body fossil. Its type locality is Deer Creek, which is in a Chattian marine sandstone/siltstone in the Yaquina Formation of Oregon.
Synonymy list
| Year | Name and author |
|---|---|
| 1966 | Aetiocetus cotylalveus Emlong pp. 4-5 figs. 5-14 |
| 1976 | Aetiocetus cotylalveus Mchedlidze p. 11 |
| 1982 | Aetiocetus cotylalveus Fordyce p. 424 |
| 1982 | Aetiocetus cotylalveus Sanders et al. p. H118 |
| 1983 | Aetiocetus cotylalveus Orr and Miller p. 96 |
| 1995 | Aetiocetus cotylalveus Barnes et al. p. 414 |
| 2006 | Aetiocetus cotylalveus Bouetel and Muizon p. 383 |
| 2008 | Aetiocetus cotylalveus Uhen et al. p. 610 |
| 2011 | Aetiocetus cotylalveus Geisler et al. p. 6 figs. Table 1 |
| 2011 | Aetiocetus cotylalveus Marx p. 83 figs. Figure 2 |
| 2015 | Aetiocetus cotylalveus Marx and Fordyce figs. Figure 2 |
| 2015 | Aetiocetus cotylalveus Tsai and Ando figs. Figure 5 |
| 2016 | Aetiocetus cotylalveus Fordyce and Marx p. 114 figs. Fig. 4 |
| 2017 | Aetiocetus cotylalveus Tsai and Kohno |
| 2018 | Aetiocetus cotylalveus Fordyce and Marx p. 5 figs. Fig. 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.
†Aetiocetus cotylalveus Emlong 1966
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. G. Barnes et al. 1995 | A species of Aetiocetus differing from A. tomitai by having a cranium with a thicker postorbital process of frontal, zygomatic process of squamosal deeper dorsoventrally, with prominent muscle tuberosity on either side of nuchal crest, more prominent vertical crest on apex of occipital shield, lacking a sagittal crest on the midline between the parietals, temporal crest on supraorbital process of frontal more prominent, temporal fossa elongate in dorsal view, not round, palatines extending posteriorly as far as anterior part of tympanic bullae rather than only as far as mid-point of orbits, external acoustic meatus not compressed anteroposteriorly between paroccipital and postglenoid processes; differing from A. weltoni, new species, by having a cranium with rostral bones extending posteriorly only to mid- point of orbits rather than to the posterior border of supraorbital process of frontal, zygomatic process of squamosal more slender; and differing from A. poly- dentatus, new species, by having a cranium with nasals much narrower and tapered and not elevated anteriorly, with broader intertemporal region, occipital shield more curved along anterior border, not so sloping anteriorly, and bearing a smaller mid-sagittal crest near its apex, notch between dorsal parts of occipital condyles wider, lambdoidal crests not flaring dorsolaterally nor overhanging temporal fossae, less prominent temporal crests on supra- orbital processes overhanging temporal fossae, lacking parasagittal crests that extend posteriorly to contact the supraoccipital shield, zygomatic process thicker and shorter, paroccipital process less massive and not so expanded anteroposteriorly, and squamosal fossa more oval, not so anteroposteriorly elongate, by having dentition less homodont, the posterior teeth being expanded anteroposteriorly by the presence of accessory cusps rather than pointed and slender, and by having 11 upper teeth on each side of the palate rather than 13 or 14. |