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Semirostrum ceruttii

Mammalia - Cetacea - Phocoenidae

Taxonomy
Semirostrum ceruttii was named by Racicot et al. (2014). Its type specimen is SDSNH 65276, a skull, and it is a 3D body fossil. Its type locality is Rancho Del Rey, which is in a Piacenzian coastal sandstone/conglomerate in the San Diego Formation of California. It is the type species of Semirostrum.

Synonymy list
YearName and author
2014Semirostrum ceruttii Racicot et al.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
classMammalia
RankNameAuthor
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Artiodactylamorpha
Artiodactyla()
Whippomorpha
orderCetacea
Pelagiceti
Neoceti
suborderOdontoceti
infraorderDelphinida
superfamilyDelphinoidea
familyPhocoenidae()
genusSemirostrum
speciesceruttii

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.

Semirostrum ceruttii Racicot et al. 2014
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Diagnosis
ReferenceDiagnosis
R. A. Racicot et al. 2014Stem 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
Composition: hydroxyapatitesubo
Form: roller-shapedo
Ontogeny: modification of partso
Environment: marine, freshwatersubo
Locomotion: actively mobileo
Life habit: aquatico
Depth habitat: surfaceo
Diet: piscivoref
Reproduction: viviparoussubo
Created: 2005-06-08 10:11:09
Modified: 2005-06-08 12:11:09
Source: f = family, subo = suborder, o = order
References: Uhen 2004, Nowak 1991

Age range: base of the Zanclean to the top of the Piacenzian or 5.33300 to 2.58000 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Zanclean5.333 - 3.6USA (California) Semirostrum ceruttii (154908)
Piacenzian3.6 - 2.58USA (California) Semirostrum ceruttii (type locality: 154906 154907)