Articles | Volume 20, issue 2
https://doi.org/10.5194/fr-20-259-2017
https://doi.org/10.5194/fr-20-259-2017
Research article
 | 
07 Dec 2017
Research article |  | 07 Dec 2017

Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru

Alberto Collareta, Olivier Lambert, Christian de Muizon, Mario Urbina, and Giovanni Bianucci

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Cited articles

Abel, O.: Les Odontocètes du Boldérien (Miocène supérieur) des environs d'Anvers, Mémoires du Musée Royal d'Histoire Naturelle de Belgique, 3, 1–155, 1905.
Amson, E., de Muizon, C., Laurin, M., Argot, C., and de Buffrénil, V.: Gradual adaptation of bone structure to aquatic lifestyle in extinct sloths from Peru, Proceedings of the Royal Society of London Part B – Biological Sciences, 281, 20140192, https://doi.org/10.1098/rspb.2014.0192, 2014.
Amson, E., Argot, C., McDonald, H. G., and de Muizon, C.: Osteology and functional morphology of the forelimb of the marine sloth Thalassocnus (Mammalia, Tardigrada), J. Mamm. Evol., 22, 169–242, https://doi.org/10.1007/s10914-014-9268-3, 2015a.
Amson, E., Argot, C., McDonald, H. G., and de Muizon, C.: Osteology and functional morphology of the axial postcranium of the marine sloth Thalassocnus (Mammalia, Tardigrada) with paleobiological implications, J. Mamm. Evol., 22 473–518, https://doi.org/10.1007/s10914-014-9280-7, 2015b.
Amson, E., de Muizon, C., and Gaudin, T. J.: A reappraisal of the phylogeny of the Megatheria (Mammalia: Tardigrada), with an emphasis on the relationships of the Thalassocninae, the marine sloths, Zool. J. Linn. Soc.-Lond., 179, 217–236, https://doi.org/10.1111/zoj.12450, 2016.
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Short summary
Extant pygmy and dwarf sperm whales (Kogia spp.) are known as small-sized and enigmatic relatives of the great sperm whale Physeter. Here we describe Koristocetus pescei, a new fossil kogiid from the late Miocene (ca 7 million years ago) of Peru. The description of this new form evokes a long history of morphological and ecological diversity in fossil kogiids, thus suggesting that our comprehension of the evolutionary history of diminutive sperm whales is still far from being exhaustive.
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