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Tohoraonepu nihokaiwaiu

Osteichthyes - Cetacea

Taxonomy
Tohoraonepu nihokaiwaiu was named by Corrie and Fordyce (2024). Its type specimen is OU 22394, a partial skeleton (partial right frontal and braincase with articulated right periotic and associated right tympanic bulla, teeth, partial atlas and axis, one partial post-axis ce), and it is a 3D body fossil. Its type locality is Awamoko Valley, which is in a Duntroonian marine sandstone in the Kokoamu Greensand Formation of New Zealand.

Synonymy list
YearName and author
2024Tohoraonepu nihokaiwaiu Corrie and Fordyce
2024Tohoraonepu nihokaiwaiu Robinson et al. p. 576

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
RankNameAuthor
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
—Whippomorpha
orderCetacea
—Pelagiceti
—Kekenodontidae()
genusTohoraonepu
speciesnihokaiwaiu

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.

†Tohoraonepu nihokaiwaiu Corrie and Fordyce 2024
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Diagnosis
ReferenceDiagnosis
J. E. Corrie and R. E. Fordyce 2024Tohoraonepu nihokaiwaiu is a heterodont kekenodontid archaeocete that differs from all other Kekenodontidae in having a more anteroposteriorly elongate and transversely compressed anterior process of the periotic and a transversely broader and more bulbous pars cochlearis; from Kekenodon onamata in having a more inflated and low-lying lateral tuberosity, longitudinal striations extending from the dorsal margin of the pars cochlearis to the aperture for cochlear aqueduct, a smaller mallear fossa and stapedial muscle fossa, and a more elongate internal acoustic meatus; from OU 22294 in having a U-shaped external acoustic meatus that more deeply excavates the ven- trolateral surface of the squamosal, more distinct anterior and posterior meatal crests, a transversely narrower internal acoustic meatus, a less transversely expanded dorsal ves- tibular area, and an atlas that is anteroposteriorly shorter; from Kekenodon onamata and OU 22294 in having a rounded anteromedial corner of the pars cochlearis; from OU 22023 in having an anterior process of the periotic that is lower, a ventral margin of the anterior process of the periotic not located ventral to the ventral margin of the pars cochlearis, a ventral margin of the anterior process of the periotic that is less rounded, a distinct anteroventral angle forming the ventral apex of the anterior process of the periotic, and a more anteroposteriorly elongate atlas.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Form: roller-shapedo
Ontogeny: modification of partso
Environment: marineo
Locomotion: actively mobileo
Life habit: aquatico
Depth habitat: surfaceo
Diet: carnivoreo
Reproduction: viviparouso
Created: 2005-03-06 14:19:05
Modified: 2017-04-17 10:41:18
Source: o = order
Reference: Uhen 2004

Age range: Duntroonian or 27.30000 to 25.20000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Duntroonian27.3 - 25.2New Zealand (South Island) Tohoraonepu nihokaiwaiu (type locality: 233345)