Toipahautea

Toipahautea; Temporal range: Late Oligocene, 27.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Infraorder:	Cetacea
Parvorder:	Mysticeti
Genus:	†Toipahautea; Tsai and Fordyce, 2018
Type species
	Toipahautea waitaki; Tsai and Fordyce, 2018

Toipahautea is a genus of baleen whale from the Late Oligocene (Chattian) Kokoamu Greensand of New Zealand.

Classification

Phylogenetic analysis recovers Toipahautea outside crown Mysticeti but more derived than Eomysticetidae, like Horopeta and Whakakai.[1]

Description

Diagnostic features of Toipahautea include: massive periotic; well-developed superior process of the periotic; prominent elongation of dorsomedial margin of the internal acoustic meatus; prominent fissure between the fenestra rotunda and the aperture for the cochlear aqueduct; small medial posterior sulcus; the presence of the anteroexternal foramen; the presence of the sigmoidal cavity; the presence of the elliptical foramen; horizontal sigmoidal cleft far anterior than the anterior margin of the sigmoidal process; posteromedial margin of the bulla orienting slightly anteromedially.

Paleobiology

Toipahautea has been recovered in the same deposits that have also yielded the primitive odontocetes Awamokoa, Austrosqualodon, Otekaikea, and Waipatia, the eomysticetids Matapanui, Tohoraata, Tokarahia, and Waharoa, and the balaenomorphs Mauicetus, Whakakai, and Horopeta.

References

Cheng-Hsiu Tsai; R. Ewan Fordyce (2018). "A new archaic baleen whale Toipahautea waitaki (early Late Oligocene, New Zealand) and the origins of crown Mysticeti". Royal Society Open Science. 5 (4): 172453. doi:10.1098/rsos.172453. PMC 5936954. PMID 29765689. Material was copied from this source, which is available under a Creative Commons Attribution 4.0 International License.

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[1] Cheng-Hsiu Tsai; R. Ewan Fordyce (2018). "A new archaic baleen whale Toipahautea waitaki (early Late Oligocene, New Zealand) and the origins of crown Mysticeti". Royal Society Open Science. 5 (4): 172453. doi:10.1098/rsos.172453. PMC 5936954. PMID 29765689. Material was copied from this source, which is available under a Creative Commons Attribution 4.0 International License.