Three new brackish-water thalassocypridine species (Crustacea: Ostracoda: Paracyprididae) from the Ryukyu Islands, southwestern Japan.
Three new brackish-water thalassocypridine species (Crustacea: Ostracoda: Paracyprididae) from the Ryukyu Islands, southwestern Japan.
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来自日本西南部琉球群岛的三种新的咸水海水鲤鱼物种（甲壳纲：介形纲：副鲤科）。
DOI：
10.11646/zootaxa.4169.3.6
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发表时间：
2016
期刊：
影响因子：
0.9
通讯作者：
K. Kakui
中科院分区：
文献类型：
--
作者：
Shimpei F Hiruta;K. Kakui
本文描述了来自日本西南亚热带琉球群岛红树林介形类部落Thalassocypridini中2属的3个新种，并提供了线粒体细胞色素c氧化酶亚基I （COI）基因的条形码序列。Mangalocypria ryukyuensis sp. 11 .发现于冲绳岛。石垣岛上的Mangalocypria种群与冲绳的M. ryukyuensis在形态上相同，但在COI序列（K2P距离）上与冲绳个体相差4.7%。这是日本在Mangalocypria首次记录到一个物种。产自冲绳岛的Paracypria longiseta sp. nov.与Pontoparta hartmanni相似。来自石垣岛的羽状旁突虫与羽状旁突虫相似。产自日本屋久岛。结果表明：不同个体间的COI遗传距离。longiseta和Pa。在Mangalocypria种群中，羽状体的大小大致相当于这两个物种和个体之间的差异。我们的研究强调，在Thalassocypridini属可能不代表自然群体，这一部落需要分类修订。
We describe three new species of brackish-water ostracods representing two genera in the ostracod tribe Thalassocypridini from mangrove forests in the Ryukyu Islands, subtropical southwestern Japan, and provide their barcoding sequences for the mitochondrial cytochrome c oxidase subunit I (COI) gene. Mangalocypria ryukyuensis sp. nov. was found on Okinawa Island. We also found a Mangalocypria population on Ishigaki Island that was morphologically identical to M. ryukyuensis on Okinawa, but an individual differed by 4.7% in COI sequence (K2P distance) from an individual from Okinawa. This is the first record for Japan of a species in Mangalocypria. Paracypria longiseta sp. nov., obtained from Okinawa Island, is similar to Pontoparta hartmanni. Paracypria plumosa sp. nov. from Ishigaki Island is similar to Pa. adnata described from Yakushima Island, Japan. The COI genetic distance between individuals of Pa. longiseta and Pa. plumosa was roughly as large as that between either of these species and individuals in the Mangalocypria populations. Our study underscores that genera in Thalassocypridini may not represent natural groups, and that this tribe needs taxonomic revision.