Four new species of the interstitial family Cobanocytheridae (Crustacea: Ostracoda) from central Japan
Four new species of the interstitial family Cobanocytheridae (Crustacea: Ostracoda) from central Japan
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DOI：
10.11646/zootaxa.2924.1.3
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发表时间：
2011-06-20
期刊：
影响因子：
0.9
通讯作者：
Tsukagoshi, Akira
中科院分区：
文献类型：
--
作者：
Higashi, Ryouichi;Tsukagoshi, Akira
本文报道了产于日本中部的四种间质钴介：池井钴介，新种，宽尾钻花介，本文报道了两个新种，分别是自1983年夏威夷拟尾介（Paracobanocytherwatanabei sp. nov.）和1984年夏威夷拟尾介（Paracobanocythergrandis sp. nov.）池井钻花介，和C. lata sp. nov.，来自日本的物种在形态上与Gottwald（1983）和C. guttaeformis Gottwald，1983分别来自加拉帕戈斯群岛，而不是来自日本的其他Cobanocythere种。日本群岛（欧亚大陆东部）和加拉帕戈斯群岛（南美洲西北部）相距约15，000公里，在地质历史上从未相邻。这一事实，以及来自日本和加拉帕戈斯群岛的Cobanocythere物种之间的形态相似性，表明该属可能在过去经历了几次全球性的扩散。相反，Cobanocythere和Paracobanocythere不仅分布在大陆和大陆岛屿周围，而且还分布在夏威夷和加拉帕戈斯群岛等海洋岛屿周围。因此，我们的结论是，cobanocytherids似乎已经能够跨越海洋长距离分散。
Four interstitial cobanocytherid species are described from central Japan: Cobanocythere ikeyai sp. nov., Cobanocythere lata sp. nov., Paracobanocythere watanabei sp. nov. and Paracobanocythere grandis sp. nov. The reports of the two new Paracobanocythere species are the second and third for this genus since the original description of P. hawaiiensis Gottwald, 1983. Cobanocythere ikeyai sp. nov., and C. lata sp. nov., from Japan are morphologically more similar to the species of the "lanceolata group" by Gottwald (1983) and C. guttaeformis Gottwald, 1983 from the Galapagos Islands, respectively, rather than to other Cobanocythere species from Japan. The Japanese archipelago (eastern Eurasian Continent) and the Galapagos Islands (north-western South America) are separated by about 15,000 km from each other, and have never been adjoined throughout geological history. This fact, and also the morphological similarities between Cobanocythere species from Japan and the Galapagos Islands, suggests that this genus may have undergone global dispersal at several times in the past. Conversely, the genera Cobanocythere and Paracobanocythere are distributed not only around continents and continental islands but also around oceanic islands such as the Hawaiian and Galapagos Islands. We conclude, therefore, that the cobanocytherids seem to have been able to disperse long distances across oceans.