A new species of yeti crab, genus Kiwa Macpherson, Jones and Segonzac, 2005 (Decapoda: Anomura: Kiwaidae), from a hydrothermal vent on the Australian-Antarctic Ridge
A new species of yeti crab, genus Kiwa Macpherson, Jones and Segonzac, 2005 (Decapoda: Anomura: Kiwaidae), from a hydrothermal vent on the Australian-Antarctic Ridge
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雪人蟹新种，Kiwa Macpherson、Jones 和 Segonzac 属，2005 年（十足目：Anomura：Kiwaidae），产于澳大利亚南极山脊的热液喷口
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Y. Won
中科院分区：
文献类型：
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作者：
Sanghui Lee;W. Lee;Y. Won
一种新的深海雪人蟹 Kiwa araonae 是在南大洋澳大利亚南极海脊 (AAR) 水深约 2000 米的热液喷口场 Mujin（“迷雾港”）中描述的。 Mujin 喷口场（南纬 62°11.79′）位于环南极海脊系统中一个未勘探的大裂缝中，是迄今为止雪人蟹最南端的记录。 Kiwa araonae n. 基瓦 araonae sp。是 Kiwaidae 科中第四个被描述的物种 Macpherson、Jones 和 Segonzac，2005 年，也是南大洋已知的第二个物种。这个新种在形态上与它的三个同系物的不同之处在于具有近乎平坦的鳃区、相对较短的吻部、具有平行侧缘的第三胸板、细长的螯、螯的直指以及2-4节足足的前基，在屈肌边缘上具有三个角刺。贝叶斯系统发育树和基于线粒体 16S rRNA 基因 (408 bp) 的遗传距离清楚地表明了该物种的独特性。在 AAR 中发现 Kiwa araonae 表明南大洋喷口动物群之间可能存在生物地理联系。 AAR 中新的热液喷口场和特有物种的存在提供了有关深海喷口动物群全球生物地理学的更多信息。
A new species of deep-sea yeti crab, Kiwa araonae , is described from a hydrothermal vent field, Mujin (“Misty Harbor”), at a depth of about 2000 m on the Australian-Antarctic Ridge (AAR), Southern Ocean. The Mujin vent field (62°11.79′S), in a large, unexplored gap in the Circum-Antarctic Ridge system, is the most southern record for a yeti crab to date. Kiwa araonae n. sp. is the fourth described species in the family Kiwaidae Macpherson, Jones and Segonzac, 2005, and the second known from the Southern Ocean. This new species differs morphologically from its three congeners by the having a nearly flat branchial region, relatively short rostrum, third sternite with parallel lateral margins, slender chela, straight fingers of the chela, and propodi of pereiopods 2-4 with three corneous spines on the flexor margins. The Bayesian phylogenetic tree and the genetic distance based on the mitochondrial 16S rRNA gene (408 bp) clearly indicate the distinctiveness of this species. The discovery of Kiwa araonae in the AAR suggests a possible biogeographic connection of the Southern Ocean vent faunas. The presence of a new hydrothermal vent field with endemic species in the AAR provides additional information on the global biogeography of deep-sea vent faunas.