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Chonecetus tomitai

Mammalia - Cetacea - Aetiocetidae

Taxonomy
Aetiocetus tomitai was named by Barnes et al. (1995) [Ashoro Museum of Japan]. Its type specimen is AMP 2, a partial skull, and it is a 3D body fossil. Its type locality is Morawan (Middle Hard Shale Member), which is in a Chattian basinal (siliceous) shale in the Morawan Formation of Japan.

It was recombined as Chonecetus tomitai by Peredo and Pyenson (2018).

Synonymy list
YearName and author
1995Aetiocetus tomitai Barnes et al. pp. 411-414 figs. Fig. 15-16
2015Aetiocetus tomitai Tsai and Ando figs. Figure 5
2017Aetiocetus tomitai Tsai and Kohno
2018Chonecetus tomitai Peredo and Pyenson p. 4

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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
suborderMysticeti
familyAetiocetidae
genusChonecetus
speciestomitai()

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.

†Chonecetus tomitai Barnes et al. 1995
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Diagnosis
ReferenceDiagnosis
L. G. Barnes et al. 1995A species of Aetiocetus differing from Aetiocetus cotylalveus, A. weltoni, new species, and A. poly- dentatus, new species, by having a cranium with a thinner postorbital process of frontal, zygomatic process of squamosal not as deep dorsoventrally, lacking prominent muscle tuberosity on either side of nuchal crest, and by having a sagittal crest, a temporal fossa that is more round in dorsal view, not elongate, external acoustic meatus compressed anteroposteriorly between paroccipital and postglenoid processes, and being smaller in overall size.
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: one only


Time interval Ma Country or state Original ID and collection number
Chattian28.1 - 23.03Japan (Hokkaido) Aetiocetus tomitai (type locality: 45787)