A new species of Gnathia (Isopoda: Cymothoida: Gnaftidae) from Okinawajima Island, Ryukyu Archipelago, southwestern Japan
A new species of Gnathia (Isopoda: Cymothoida: Gnaftidae) from Okinawajima Island, Ryukyu Archipelago, southwestern Japan
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DOI：
10.2108/zsj.24.1266
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发表时间：
2007-12-01
影响因子：
0.9
通讯作者：
Hirose, Euichi
中科院分区：
文献类型：
--
作者：
Ota, Yuzo;Tanaka, Katsuhiko;Hirose, Euichi
在日本西南部琉球群岛的冲绳岛上发现了一种名为limicola sp. 11 .的Gnathia。这个物种的洞穴是在红树林附近泥泞的潮滩上的一个小潮间溪岸边发现的。雄成虫与其他Gnathia种类的不同之处是：(1)细刚毛覆盖在触角1号的花梗1和2条，触角2号的花梗1-3条和下颌骨的胸毛；(2)头侧额腹缘内侧呈缺口状，外侧部分延伸至额背缘以外；(3)所述笔尖融合成向后指向的薄矩形刀片。雌成虫和幼虫在形态上也与其它Gnathia种类有所区别。根据野外和实验室观察，该物种的交配行为似乎与栖息在欧洲和北非盐沼的formica Paragnathia （Hesse, 1862）相似。
Gnathia limicola sp. nov. is described from Okinawajima Island, Ryukyu Archipelago, southwestern Japan. Burrows of this species were found in a small intertidal creek bank on a muddy tidal flat near mangrove trees. Adult males differ from those of other Gnathia species in the following features: (1) fine setae cover peduncle articles 1 and 2 of antenna 1, peduncle articles 1-3 of antenna 2, and the erisma of the mandibles; (2) the ventral frontal border of the cephalon is medianly notched, and the lateral parts extend beyond the dorsal frontal border; and (3) the penes are fused into a thin rectangular blade directed posteriorly. Adult females and praniza larvae were also distinguished morphologically from other Gnathia species. Based on field and laboratory observations, the mating behavior of this species appears similar to that of Paragnathia formica (Hesse, 1862), which inhabits salt marshes in Europe and North Africa.