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Metasqualodon

Mammalia - Ungulata

Taxonomy
Metasqualodon was named by Hall (1911) [Sepkoski's age data: T Ol-u Sepkoski's reference number: 1022].

It was considered a nomen dubium by Fordyce and de Muizon (2001).

It was assigned to Squalodontidae by Hall (1911), Kellogg (1928), Simpson (1945), Okazaki (1982), Okazaki (1987), Carroll (1988), Benton (1993) and McKenna and Bell (1997); to Cetacea by Sepkoski (2002) and Fitzgerald (2004); and to Mysticeti by Geisler et al. (2017).

Synonymy list
YearName and author
1911Metasqualodon Hall p. 262
1928Metasqualodon Kellogg p. 32 figs. Table 1
1945Metasqualodon Simpson p. 100
1982Metasqualodon Okazaki p. 108
1987Metasqualodon Okazaki p. 137
1988Metasqualodon Carroll
1993Metasqualodon Benton p. 761
1997Metasqualodon McKenna and Bell p. 373
2002Metasqualodon Sepkoski, Jr.
2004Metasqualodon Fitzgerald p. 206
2017Metasqualodon Geisler et al. p. 5 figs. Figure 4

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
RankNameAuthor
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
orderUngulata(Linnaeus 1766)
orderArtiodactyla()
Cetacea()
Pelagiceti
Neoceti
suborderMysticeti
genusMetasqualodon

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
No diagnoses are available
Measurements
No measurements are available
Composition: hydroxyapatitesubo
Form: roller-shapedo
Ontogeny: modification of partso
Environment: marinesubo
Locomotion: actively mobileo
Life habit: aquaticsubo
Depth habitat: surfaceo
Diet: carnivoresubo
Diet 2: suspension feedersubo
Reproduction: viviparouso
Created: 2005-03-06 14:20:41
Modified: 2005-03-06 16:34:40
Source: subo = suborder, o = order
Reference: Uhen 2004

Age range: Chattian or 28.10000 to 23.03000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Oligocene28.4 - 23.03Japan (Yamaguchi) M. symmetricus (51437)
Chattian28.1 - 23.03Japan (Fukuoka) M. symmetricus (45832 45833 45834)