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Brevirostrodelphis dividum

Mammalia - Cetacea

Taxonomy
Delphinodon dividum was named by True (1912). Its type specimen is USNM 7278, a skull, and it is a 3D body fossil. Its type locality is Chesapeake Beach, south of, Zones 3-6, which is in a Burdigalian offshore siltstone in the Calvert Formation of Maryland. It is the type species of Brevirostrodelphis.

It was recombined as Brevirostrodelphis dividum by Godfrey and Lambert (2023).

Synonymy list
YearName and author
1912Delphinodon dividum True p. 188 figs. Plates 17-26
1930Delphinodon dividum Hay p. 587
1985Delphinodon dividum Barnes p. 25
1996Delphinodon dividum Dawson p. 132
2008Delphinodon dividum Whitmore and Kaltenbach p. 204
2023Brevirostrodelphis dividum Godfrey and Lambert p. 108

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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
RankNameAuthor
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
—Whippomorpha
orderCetacea
—Pelagiceti
—Neoceti
suborderOdontoceti
infraorderDelphinida
genusBrevirostrodelphis
speciesdividum()

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.

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Diagnosis
No diagnoses are available
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: carnivoresubo
Reproduction: viviparoussubo
Created: 2005-03-06 14:21:39
Modified: 2005-09-22 15:42:08
Source: subo = suborder, o = order
Reference: Uhen 2004

Age range: base of the Burdigalian to the top of the Langhian or 20.45000 to 13.82000 Ma

Collections (7 total)


Time interval Ma Country or state Original ID and collection number
Aquitanian - Langhian23.04 - 13.82USA (North Carolina) Delphinodon dividum (48887)
Burdigalian20.45 - 15.98USA (Maryland) Delphinodon dividum (type locality: 45493)
Burdigalian20.45 - 15.98USA (California) Delphinodon dividum (19151)
Langhian15.98 - 13.82USA (Virginia) Delphinodon dividum (48883)
Langhian15.98 - 13.82USA (Maryland) Brevirostrodelphis dividum (168458) Delphinodon dividum (45506)
Middle Miocene15.98 - 11.63Japan (Gifu) Delphinodon dividum (55920)