The oldest record of Alligator sinensis from the Late Pliocene of Western Japan, and its biogeographic implication
The oldest record of Alligator sinensis from the Late Pliocene of Western Japan, and its biogeographic implication
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DOI：
10.1016/j.jseaes.2016.04.017
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发表时间：
2016-07-01
影响因子：
3
通讯作者：
Kobayashi, Yoshitsugu
中科院分区：
文献类型：
--
作者：
Iijima, Masaya;Takahashi, Keiichi;Kobayashi, Yoshitsugu
东亚地区晚新生代扬子鳄的化石记录对于了解亚洲扬子鳄的起源和过去的分布是至关重要的，目前亚洲扬子鳄只有一个物种--扬子鳄。本文报道了日本西部上新世晚期(约3.0 Ma)中华龙虾的部分骨骼。这只日本中华按蚊体型很大(全长200厘米)，与现存个体的最大体型相当。它展示了中国最古老的记录和本种在过去的更广泛的分布。东亚的构造和地理史表明，扬子鳄可能在25 Ma之前或10 Ma之后散布到日本，但由于日本岛弧的半孤立状态和更新世气候的恶化，扬子鳄最终从日本灭绝。(C)2016爱思唯尔有限公司。保留所有权利。
The late Cenozoic fossil record of alligators in East Asia is crucial in understanding the origin and past distribution of Asian alligators that are now represented by a single species, Alligator sinensis. This study reports a partial skeleton of A. sinensis from the Late Pliocene (approximately 3.0 Ma) of western Japan. This Japanese A. sinensis is large in size (>200 cm total length), comparable to the maximum size of extant individuals. It demonstrates the oldest record of A. sinensis and wider distribution of this species in the past. Tectonic and geographic history of East Asia suggests that alligators presumably dispersed into Japan before 25 Ma or after 10 Ma, yet finally were wiped out from Japan due to the semi-isolated condition of the Japanese island arc and the deteriorated climate during the Plio-Pleistocene. (C) 2016 Elsevier Ltd. All rights reserved.