A new species of Plesiosorex (Mammalia, Eulipotyphla) from the Early Miocene of Japan: first record of the genus from East Asia

A nearly complete dentary with preserved i2, p3 and m1 of a relatively large soricomorph from the Dota locality, Kani Basin, Early Miocene (ca. 18.5 Ma), Nakamura Formation of the Mizunami Group in central Japan, is described as a new species of . It represents the first record of the genus in East...

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Bibliographic Details
Published inFossil Imprint Vol. 73; no. 3; pp. 292 - 299
Main Authors Oshima, Mitsuharu, Tomida, Yukimitsu, Orihara, Takamichi
Format Journal Article
LanguageEnglish
Published De Gruyter Open 01.12.2017
Subjects
Eulipotyphla
Kani Basin
Nakamura Formation
Neogene
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Summary:A nearly complete dentary with preserved i2, p3 and m1 of a relatively large soricomorph from the Dota locality, Kani Basin, Early Miocene (ca. 18.5 Ma), Nakamura Formation of the Mizunami Group in central Japan, is described as a new species of . It represents the first record of the genus in East Asia. sp. nov. has a slender dentary, posteriorly elongated angular and condyloid processes, p3 with two roots, and m1 without hypoconulid or cingulid. Cladistic analysis of and seven species of shows that is basally positioned with respect to , and it seems likely that originated in Europe at the beginning of the Miocene and expanded its distribution to East Asia and North America during the Early Miocene. Two Middle Miocene North American species are more closely related to each other than to European species of the same age.
ISSN:2533-4069
2533-4069
DOI:10.2478/if-2017-0016