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Diorocetus ✝

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Description

Diorocetus is an extinct genus of baleen whale, belonging to the family Pelocetidae. Fossils are found in Miocene-aged marine strata in North America and Japan.

From Wikipedia article at https://en.wikipedia.org/wiki/Diorocetus, which is released under the Creative Commons Attribution-Share-Alike License 3.0.

Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	4832356	https://www.gbif.org/species/4832356
PaleoBioDB ID (PBDB)	36707	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=36707

Rank

genus

Taxonomy (GBIF,PBDB)

Life : Animalia : Chordata : Mammalia : Cetacea : Diorocetus

Taxonomic Status (GBIF)

accepted

Classification
(PBDB,GBIF)

Rank	Name	Author
-	Eukaryota
-	Opisthokonta	Cavalier-Smith 1987
kingdom	Animalia
-	Triploblastica	Lankester 1877
-	Nephrozoa	Jondelius et al. 2002
-	Deuterostomia	Grobben 1908
phylum	Chordata	Haeckel 1847
subphylum	Vertebrata	Lamarck 1801
superclass	Gnathostomata	Gegenbauer 1874
-	Osteichthyes
-	Sarcopterygii	Romer 1955
subclass	Dipnotetrapodomorpha
subclass	Tetrapodomorpha
-	Tetrapoda
-	Reptiliomorpha	Säve-Söderbergh 1934
-	Anthracosauria	Säve-Söderbergh 1934
-	Batrachosauria
-	Cotylosauria
-	Amniota	Haeckel 1866
-	Synapsida	Osborn 1903
-	Therapsida
infraorder	Cynodontia
-	Epicynodontia	Hopson and Kitching 2001
infraorder	Eucynodontia	Kemp 1982
-	Probainognathia	Hopson 1990
-	Mammaliamorpha	Rowe 1988
-	Mammaliaformes	Rowe 1988
class	Mammalia	Linnaeus 1758
order	Cetacea	Brisson 1762
-	Pelagiceti	Uhen 2008
-	Neoceti	Fordyce and de Muizon 2001
suborder	Mysticeti	Cope 1891
-	Chaeomysticeti
-	Plicogulae	Geisler et al. 2011
superfamily	Balaenopteroidea	Gray 1868
genus	Diorocetus	Kellogg 1968

Scientific Name

Diorocetus Kellogg, 1968

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Diorocetus	genus	belongs to Cetotheriidae	stated without evidence	Kellogg, 1968
Diorocetus	genus	belongs to Cetotheriidae	implied	Carroll, 1988
Diorocetus	genus	belongs to Cetotheriidae	stated without evidence	Gottfried et al., 1994
Diorocetus	genus	belongs to Cetotheriidae	implied	McKenna and Bell, 1997
Diorocetus	genus	belongs to Cetacea	second hand	Sepkoski, 2002
Diorocetus	genus	belongs to Cetotheriidae	stated without evidence	Geisler and Sanders, 2003
Diorocetus	genus	belongs to Mysticeti	stated without evidence	Bouetel and Muizon, 2006
Diorocetus	genus	belongs to Diorocetidae	stated without evidence	Steeman, 2007
Diorocetus	genus	belongs to Cetotheriidae	stated without evidence	Otsuka and Ota, 2008
Diorocetus	genus	belongs to Mysticeti	stated without evidence	Uhen et al., 2008
Diorocetus	genus	belongs to Balaenomorpha	stated without evidence	Geisler et al., 2011
Diorocetus	genus	belongs to Balaenopteroidea	stated without evidence	Hampe and Ritsche, 2011
Diorocetus	genus	belongs to Thalassotherii	stated without evidence	Bisconti et al., 2013
Diorocetus	genus	belongs to Balaenopteroidea	stated with evidence	Marx and Fordyce, 2015
Diorocetus	genus	belongs to Chaeomysticeti	stated without evidence	Boessenecker and Fordyce, 2015
Diorocetus	genus	belongs to Cetotheriidae	stated without evidence	Berta, 2017

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

20.4 - 16.0 Ma
Miocene

Last Recorded Appearance

13.8 - 11.6 Ma
Miocene

Environment

marine (based on Mysticeti)

Motility

actively mobile (based on Cetacea)

Diet

carnivore, suspension feeder (based on Mysticeti)

Reproduction

viviparous (based on Cetacea)

Ontogeny

modification of parts (based on Cetacea)

Taphonomy

hydroxylapatite (based on Mysticeti)

Primary Reference (PBDB)

R. Kellogg. 1968. A hitherto unrecognized Calvert Cetothere. Bulletin of the United States National Museum 247(6):133-161

Wikipedia

https://en.wikipedia.org/wiki/Diorocetus

Fossil Distribution

Subtaxa

Name	Status	Fossil Occurrences	Oldest	Youngest
Diorocetus chichibuensis ✝ species	accepted (GBIF) listed (PBDB)	1	20.4 Ma Miocene	20.4 Ma Miocene
Diorocetus hiatus ✝ species	accepted (GBIF) listed (PBDB)	6	16.0 Ma Miocene	16.0 Ma Miocene
Diorocetus shobarensis ✝ species	accepted (GBIF) listed (PBDB)	1	20.4 Ma Miocene	20.4 Ma Miocene

Synonymy List

Year	Name and Author
1968	Diorocetus Kellogg p. 133
1984	Diorocetus Whitmore p. 230
1988	Diorocetus Carroll
1994	Diorocetus Gottfried et al. p. 233
1997	Diorocetus McKenna and Bell p. 376
2002	Diorocetus Sepkoski, Jr.
2003	Diorocetus Geisler and Sanders p. 27
2003	Diorocetus Yoshida et al. p. 2
2006	Diorocetus Bouetel and Muizon p. 384
2007	Diorocetus Steeman p. 880

Year	Name and Author
2008	Diorocetus Otsuka and Ota p. 12
2008	Diorocetus Uhen et al. p. 614
2008	Diorocetus Whitmore and Barnes p. 173
2011	Diorocetus Geisler et al. p. 6 figs. Table 1, FIgure 5
2011	Diorocetus Hampe and Ritsche p. 96
2013	Diorocetus Bisconti et al. p. 122 figs. Fig. 28
2015	Diorocetus Boessenecker and Fordyce figs. Table 1
2015	Diorocetus Marx and Fordyce p. 4 figs. Figure 2
2017	Diorocetus Berta p. 168

References

Kellogg R. (1968) A hitherto unrecognized Calvert Cetothere, Bulletin of the United States National Museum 247 6, 133-161

Whitmore F. C. (1984) Stratigraphy and paleontology of the outcropping Tertiary beds, Stratigraphy and Paleontology of the Outcropping Tertiary Beds in the Pamunkey River Region, Central Virginia Coastal Plain, 227-231

Carroll R. L. (1988) , Vertebrate Paleontology and Evolution, 1-698

McKenna M. C., Bell S. K. (1997) , Classification of Mammals Above the Species Level, 1-640

Sepkoski, Jr. J. J. (2002) A compendium of fossil marine animal genera, Bulletins of American Paleontology 363, 1-560

Yoshida K., Kimura T., et al (2003) New cetothere (Cetacea: Mysticeti) from the Miocene Chichibumachi Group, Japan, Bulletin of the Saitama Museum of Natural History 20-21, 1-10

Bouetel V., Muizon C. (2006) The anatomy and relationships of Piscobalaena nanna (Cetacea, Mysticeti), a Cetotheriidae s.s. from the early Pliocene of Peru, Geodiversitas 28 2, 319-395

Steeman M. E. (2007) Cladistic analysis and a revised classification of fossil and recent mysticetes, Zoological Journal of the Linnean Society 150, 875-894

Otsuka H., Ota Y. (2008) Cetotheres from the early Middle Miocene Bihoku Group in Shobara District, Hiroshima Prefecture, West Japan, Miscellaneous Reports of the Hiwa Museum for Natural History 49 2, 1-66

Uhen M. D., Fordyce R. E., et al (2008) Mysticeti, Evolution of Tertiary Mammals of North America II, 607-628

Whitmore F. C., Barnes L. G. (2008) The Herpetocetinae, a new subfamily of extinct baleen whales (Mammalia, Cetacea, Cetotheriidae), Virginia Museum of Natural History Special Publication 14, 141-180

Geisler J. H., McGowen M. R., et al (2011) A supermatrix analysis of genomic, morphological, and paleontological data from crown Cetacea, BMC Evolutionary Biology 11 112, 1-33

Hampe O., Ritsche I. (2011) Bie Bartenwalfauna (Cetacea: Mysticeti: Balaenomorpha) aus dem Luneburgium (Serravallium, Mittelmiozan) von Freetz bei Sittensen (Niedersachsen, Deutschland), Zeistschrift fur Geologische Wissenschaften 39 2, 83-110

Bisconti M., Lambert O., et al (2013) Taxonomic revision of Isocetus depauwi (Mammalia, Cetacea, Mysticeti) and the phylogenetic relationships of archaic 'cetothere' mysticetes, Palaeontology 56 1, 95-127 doi:10.1111/j.1475-4983.2012.01168.x

Boessenecker R. W., Fordyce R. E. (2015) A new genus and species of eomysticetid (Cetacea: Mysticeti) and a reinterpretation of ‘Mauicetus’ lophocephalus Marples, 1956: Transitional baleen whales from the upper Oligocene of New Zealand, Zoological Journal of the Linnean Society doi:10.1111/zoj.12297

Marx F. G., Fordyce R. E. (2015) Baleen boom and bust: a synthesis of mysticete phylogeny, diversity and disparity, Royal Society Open Science 2, 140434 doi:10.1098/rsos.140434

Berta A. (2017) , The Rise of Marine Mammals: 50 Million Years of Evolution, 1-198

Sepkoski, J. J., Jr. (2002). A compendium of fossil marine animal genera. Bulletins of American Paleontology. 363, 1-560. - via The Interim Register of Marine and Nonmarine Genera

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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