| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Semirostrum
Taxonomy
Semirostrum was named by Racicot et al. (2014). Its type is Semirostrum ceruttii.
It was assigned to Phocoenidae by Racicot et al. (2014), Colpaert et al. (2015), Marx et al. (2016), Berta (2017).
It was assigned to Phocoenidae by Racicot et al. (2014), Colpaert et al. (2015), Marx et al. (2016), Berta (2017).
Species
S. ceruttii (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Semirostrum Racicot et al. |
| 2015 | Semirostrum Colpaert et al. p. 9 figs. Figure 8 |
| 2016 | Semirostrum Marx et al. p. 139 |
| 2017 | Semirostrum Berta p. 165 |
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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 | |
|---|---|---|
| R. A. Racicot et al. 2014 | Stem phocoenid (Figure S4; Supplemental Experimental Procedures I and II) defined by three autapomorphies: prognathous, fused, mostly edentulous mandibular symphysis (greater than or equal to 40% of the length of complete mandible); lingually positioned cylindrical teeth with apex of crown dorsolabially directed; and deltoid shape of posterior process of the periotic (Figure 1E). |
Measurements
No measurements are available
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| Source: f = family, subo = suborder, o = order | |||||
| References: Nowak 1991, Uhen 2004 | |||||
Age range: base of the Zanclean to the top of the Piacenzian or 5.33300 to 2.58000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Messinian - Zanclean | USA (California) | S. sp. (77499) | |
| Zanclean | USA (California) | S. ceruttii (154908) | |
| Piacenzian | USA (California) | S. ceruttii (154906 154907) |