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Ashleycetus
Taxonomy
Ashleycetus was named by Sanders and Geisler (2015). Its type is Ashleycetus planicapitis.
It was assigned to Ashleycetidae by Sanders and Geisler (2015), Marx et al. (2016) and Berta (2017); and to Xenorophidae by Velez-Juarbe (2023).
It was assigned to Ashleycetidae by Sanders and Geisler (2015), Marx et al. (2016) and Berta (2017); and to Xenorophidae by Velez-Juarbe (2023).
Species
A. planicapitis (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Ashleycetus Sanders and Geisler p. 9 |
| 2016 | Ashleycetus Marx et al. p. 115 |
| 2017 | Ashleycetus Berta p. 160 |
| 2023 | Ashleycetus Velez-Juarbe pp. 49-50 figs. Figure 21 |
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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.
G. †Ashleycetus Sanders and Geisler 2015
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†Ashleycetus planicapitis Sanders and Geisler 2015
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. E. Sanders and J. H. Geisler 2015 | Long postorbital portion of the skull; external bony nares well anterior to supraorbital processes of frontals; interdigitating frontal/parietal suture; posteromedial corner of the ascending process of the maxilla forms a right angle; parietal extends anterolaterally along the posterior margin of supraor- bital process of the frontal such that the width across frontal/ parietal suture is much greater than width across narrowest inter- temporal constriction (autapomorphy); occipital condyle has very a short neck (autapomorphy); width across condyles greatly exceeds their height; short paroccipital process; and basioccipital crest broad at base. Ashleycetus differs from Archaeodelphis in having much longer frontals on the roof of the skull and in hav- ing a maxillary foramen (i.e., dorsal infraorbital foramen situated well posterior on supraorbital process); differs from Mirocetus in lacking a sagittal crest and apparently an infraorbital plate and in having a much less extensive ascending process of maxilla; dif- fers from Simocetus in having a pointed supraoccipital and a supraorbital process that is concave posteriorly in dorsal view; differs from Xenorophidae in having the posterior termination of the premaxilla anterior to the orbits and in lacking a frontal window; and differs from Agorophius in having a supraorbital process that is concave posteriorly and external nares anterior to the orbits. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||