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Incakujira

From Wikipedia, the free encyclopedia
Extinct genus of rorqual whales

Incakujira
Temporal range:Miocene
(Tortonian-Messinian), ~8–7.3 Ma
Holotype specimen exhibited atGamagori,Japan
Scientific classificationEdit this classification
Domain:Eukaryota
Kingdom:Animalia
Phylum:Chordata
Class:Mammalia
Order:Artiodactyla
Infraorder:Cetacea
Superfamily:Balaenopteroidea
Family:Balaenopteridae
Genus:Incakujira
Marx & Kohno, 2016
Species

Incakujira (meaning Inca whale) is agenus ofrorqual whales that lived during theLate Miocene epoch in what are now the coasts ofPeru, about 8 million to 7.3million years ago. It contains two species,Incakujira anillodefuego andIncakujira fordycei. The type species,I. anillodefuego, was named and described in 2016. The second species was described in 2024. All known specimens have been found in the sediments of thePisco Formation ofPeru, which dates to the LateMiocene.

Description

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Paratype specimen

Incakujira differs from other rorquals (fossil and extant) in having a less attenuated rostrum and the features of the maxilla, supraorbital, and remainder of the cranium.Kujira in the genus name means "whale" in Japanese.[1][2]


Paleobiology

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The twisted postglenoid process of the squamosal suggests that the lunge-feeding capabilities ofIncakujira were not as great as those of extant rorquals, and thatIncakujira itself also pursued additionalkrill-feeding strategies like skimming.[1]

References

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  1. ^abMarx, F. G.; Kohno, N. (2016)."A new Miocene baleen whale from the Peruvian desert".Royal Society Open Science.3 (10):1–27.Bibcode:2016RSOS....360542M.doi:10.1098/rsos.160542.PMC 5098998.PMID 27853573.
  2. ^Kimura, T.; Hasegawa, Y. (2024)."A new species of Late Miocene balaenopterid, Incakujira fordycei, from Sacaco, Peru"(PDF).Bulletin of the Gunma Museum of Natural History (28):1–14.

External links

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Portals:
Genera ofbaleen whales and their extinct allies
Aetiocetidae
Llanocetidae
Mammalodontidae
Chaeomysticeti
Eomysticetoidea
Eomysticetidae
Balaenomorpha
Balaenidae
Thalassotherii
Aglaocetidae
Diorocetidae
Pelocetidae
Tranatocetidae
Cetotheriidae
Cetotheriinae
Herpetocetinae
Balaenopteroidea
Balaenopteridae
Aetiocetus cotylalveusJanjucetus hunderiHoropeta umarereParietobalaena yamaokai
Incakujira
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