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Squaloziphius
Taxonomy
Squaloziphius was named by Muizon (1990) [Sepkoski's age data: T Mi-l]. It is the type genus of Squaloziphiinae. It was considered monophyletic by Uhen et al. (2008).
It was assigned to Hyperoodontidae by McKenna and Bell (1997); to Squaloziphiinae by Muizon (1990) and Fordyce and de Muizon (2001); to Cetacea by Sepkoski (2002); to Odontoceti by Lambert (2005); to Eurhinodelphinidae by Uhen et al. (2008); to Odontoceti by Geisler et al. (2011); and to Squaloziphiidae by Lambert et al. (2019).
It was assigned to Hyperoodontidae by McKenna and Bell (1997); to Squaloziphiinae by Muizon (1990) and Fordyce and de Muizon (2001); to Cetacea by Sepkoski (2002); to Odontoceti by Lambert (2005); to Eurhinodelphinidae by Uhen et al. (2008); to Odontoceti by Geisler et al. (2011); and to Squaloziphiidae by Lambert et al. (2019).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1990 | Squaloziphius Muizon pp. 282-292 figs. 1-4 |
| 1997 | Squaloziphius McKenna and Bell p. 382 |
| 2001 | Squaloziphius Fordyce and de Muizon p. 179 |
| 2002 | Squaloziphius Sepkoski |
| 2005 | Squaloziphius Lambert p. 493 |
| 2008 | Squaloziphius Uhen et al. p. 572 |
| 2011 | Squaloziphius Geisler et al. p. 5 figs. Table 1 |
| 2019 | Squaloziphius Lambert et al. |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. D. Uhen et al. 2008 | Close in size to Mesoplodon bidens; rostrum wide at its base and dorso-ventrally flattened; narial fossa very elongated and passing continuously to the mesorostral gutter; premaxillae with spiracular plates narrow and straight in lateral view, showing the typical transverse premaxillary crest of ziphiids on the vertex, and overhanging the maxillae laterally; naso-frontal platform elongated antero-posteriorly; temporal fossa visible dorsally and not totally covered by maxillae and parietals; jugal and lacrimal not fused; preorbital process prominent and antorbital notch deep; supraorbital process thin; zygomatic process very large and stout and having an enormous rounded postglenoid process; pterygoid bones with long and unexcavated hamular apices. Wide and large hamular fossa for the hamular lobe of the pterygoid sinus; dorsal border of the pterygoid sinus not reaching the roof of the orbit and temporal fossa; palatines large; alar process of the basioccipital excavated by a fossa for a medial lobe of pterygoid sinus; basioccipital basin extremely large and wide; lambdoid crests not very long and supraoccipital wide and flat; cerebral skull not as developed as in living ziphiids (Muizon, 1991). |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||
Age range: Aquitanian or 23.03000 to 20.44000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Aquitanian | USA (Washington) | S. emlongi (45481) |