Late Pleistocene hares of the Japanese archipelago: Paleobiogeographic implication at the Last Glacial Maximum
Late Pleistocene hares of the Japanese archipelago: Paleobiogeographic implication at the Last Glacial Maximum
复制标题
日本列岛更新世晚期的野兔:末次盛冰期的古生物地理意义
DOI:
10.1002/oa.2645
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
T. and Sasaki K.
中科院分区:
文献类型:
--
作者:
Sawaura R.;Sawada J.;Sato T.;Suzuki;T. and Sasaki K.
The Tsugaru Strait is often referred to as Blakiston's Line in biogeography. Although this strait is thought to have become narrower during the Last Glacial Maximum, it did not close completely to form a land bridge. Sea‐level drawdown associated with cooling nevertheless weakened the influence of the Tsugaru Strait as a barrier to faunal migration. The currently accepted hypothesis is that only some large and highly mobile ungulates were able to migrate to Honshu over this strait to the exclusion of small mammals. However, this remains problematic as very few fossils corroborate this idea, and quantitative identification methods for use with tiny fragments of teeth have not been developed. In this study, we determine which of the speciesLepus timidus(now distributed on Hokkaido and to the north) andLepus brachyurus(now mainly distributed on Honshu, Shikoku, and Kyushu) can accurately be identified within a sample of Late PleistoceneLepussp. fossils recently unearthed from the Shitsukari‐Abe cave to the immediate south of the Tsugaru Strait. This is because we are unable to exclude the possibility that these fossils are referable toL. timiduson the basis of site location alone. Thus, utilising images of mandibular third premolar teeth obtained via microcomputed tomography scanning, we report (a) linear measurements, (b) a survey of the frequency of appearance of nonmetric traits, and (c) principal component analysis using landmark methods. The results show that fossil representatives of the genusLepuscan be differentiated from extantL. timidusand closely resembleL. brachyurus. Considering the past allopatric distribution of the 2 species suggested by other studies as well as fossil records around the Tsugaru Strait, this result corroborates the existing hypothesis that only large and highly mobile ungulates were able to navigate the Tsugaru Strait.
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DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
河村 愛;河村善也
通讯作者:
河村善也
DOI:
10.4116/jaqua.46.171
发表时间:
2007
期刊:
The Quaternary Research (daiyonki-kenkyu)
影响因子:
--
作者:
Y. Kawamura
通讯作者:
Y. Kawamura
DOI:
10.1080/02724634.1988.10011674
发表时间:
1988
期刊:
影响因子:
--
作者:
Jon A. White
通讯作者:
Jon A. White
DOI:
10.1111/j.1469-7998.1996.tb05408.x
发表时间:
1996
期刊:
影响因子:
--
作者:
F. Suchentrunk;J. Flux
通讯作者:
J. Flux
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
孝雄 佐藤
通讯作者:
孝雄 佐藤