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Semirostrum ceruttii âśť

Description

Semirostrum ceruttii is an extinct porpoise that lived between 5 and 1.5 million years ago (Ma), during the Pliocene epoch. The species is highly distinctive due to the extremely long symphysis on the lower jaw, reaching lengths of 85 centimeters (33.46 inches), while that of a modern porpoise are 1–2 centimeters (0.39–0.79 inches) long. The main hypothesis regarding its use is that it probed along the sediment in the murky estuaries and shores of what is now California in search of food, which would easily be scooped up the symphysis and into the jaws. The etymology of the name means "half beak", referring to the upper jaw being half the length of the lower.


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)8613280https://www.gbif.org/species/8613280
PaleoBioDB ID (PBDB)290000https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=290000
Rankspecies
Taxonomy (GBIF)Life : Animalia : Chordata : Mammalia : Cetacea : Phocoenidae : Semirostrum : Semirostrum ceruttii
Taxonomy (PBDB)Life : Animalia : Chordata : Mammalia : Cetacea : Phocoenidae : Semirostrum : Semirostrum ceruttii
Taxonomic Status (GBIF)accepted
Classification
(PBDB,GBIF)
RankNameAuthor
-Eukaryota
-OpisthokontaCavalier-Smith 1987
kingdomAnimalia
-TriploblasticaLankester 1877
-NephrozoaJondelius et al. 2002
-DeuterostomiaGrobben 1908
phylumChordataHaeckel 1847
subphylumVertebrataLamarck 1801
superclassGnathostomataGegenbauer 1874
-Osteichthyes
-SarcopterygiiRomer 1955
subclassDipnotetrapodomorpha
subclassTetrapodomorpha
-Tetrapoda
-ReptiliomorphaSäve-Söderbergh 1934
-AnthracosauriaSäve-Söderbergh 1934
-Batrachosauria
-Cotylosauria
-AmniotaHaeckel 1866
-SynapsidaOsborn 1903
-Therapsida
infraorderCynodontia
-EpicynodontiaHopson and Kitching 2001
infraorderEucynodontiaKemp 1982
-ProbainognathiaHopson 1990
-MammaliamorphaRowe 1988
-MammaliaformesRowe 1988
classMammaliaLinnaeus 1758
orderCetaceaBrisson 1762
-PelagicetiUhen 2008
-NeocetiFordyce and de Muizon 2001
suborderOdontocetiFlower 1867
infraorderDelphinidaMuizon 1984
superfamilyDelphinoideaFlower 1865
familyPhocoenidae
genusSemirostrumRacicot et al. 2014
speciesSemirostrum ceruttiiRacicot et al. 2014
Generic NameSemirostrum
Scientific NameSemirostrum ceruttii Racicot et al., 2014
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Semirostrum ceruttiispeciesbelongs to Semirostrumstated with evidenceRacicot et al., 2014
Status (PBDB)extinct
Taxon Size (PBDB)1
First Recorded Appearance5.33 - 3.60 Ma
Neogene
Last Recorded Appearance3.60 - 2.59 Ma
Cenozoic
Environmentmarine,freshwater (based on Odontoceti)
Motilityactively mobile (based on Cetacea)
Dietpiscivore (based on Phocoenidae)
Reproductionviviparous (based on Odontoceti)
Ontogenymodification of parts (based on Cetacea)
Taphonomyhydroxylapatite (based on Odontoceti)
Primary Reference (PBDB)R. A. Racicot, T. A. Deméré, and B. L. Beatty, R. W. Boessenecker. 2014. Unique feeding morphology in a new prognathous extinct porpoise from the Pliocene of California. Current Biology
Wikipediahttps://en.wikipedia.org/wiki/Semirostrum_ceruttii

Fossil Distribution

Synonymy List

YearName and Author
2014Semirostrum ceruttii Racicot et al.

References

Racicot R. A., Deméré T. A., et al (2014) Unique feeding morphology in a new prognathous extinct porpoise from the Pliocene of California, Current Biology doi:10.1016/j.cub.2014.02.031
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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