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Yaquinacetus meadi
Taxonomy
Yaquinacetus meadi was named by Lambert et al. (2019). Its type specimen is USNM 214705, a partial skeleton (nearly complete cranium (lacking only the left supraorbital), with associated ear bones (periotic, tympanic, malleus, incus, and stapes), right hemimandible, te), and it is a 3D body fossil. Its type locality is Thiel Creek, north, which is in a Chattian/Burdigalian marine mudstone in the Nye Formation of Oregon. It is the type species of Yaquinacetus.
Synonymy list
| Year | Name and author |
|---|---|
| 2019 | Yaquinacetus meadi Lambert et al. figs. Figs. 2-9 |
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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.
†Yaquinacetus meadi Lambert et al. 2019
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. Lambert et al. 2019 | Yaquinacetus meadi is a medium-sized homodont odontocete characterized by a moderately elongated rostrum making up 60% of the condylobasal length and bearing approxi- mately 51 alveoli in each upper tooth row; a knob-like, rectangular vertex; and an anteroposteriorly elongated temporal fossa. It differs from Squaloziphius emlongi in its smaller size (bizygomatic width of holotype = 241 mm); the premaxillary foramen being located more posteriorly, at the level of the anteromedial limit of bony nares; the presence of a single, large dorsal infraorbital foramen posterolateral to the antorbital notch; the proportionally wider vertex of the skull (ratio between minimum width of vertex and bizygomatic width = 0.16, as compared with 0.11 in S. emlongi); the more abruptly elev- ated vertex of the skull, with the ascending process of the premax- illa drawing an angle of about 45° with the dorsal surface of the rostrum at its base; the basioccipital crests being less posteriorly diverging (angle of 55–60°); and the less massive zygomatic and postglenoid processes of the squamosal. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||
Age range: base of the Chattian to the top of the Burdigalian or 28.10000 to 15.97000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chattian - Burdigalian | USA (Oregon) | Yaquinacetus meadi (type locality: 200274) |