First seep-dwelling Desbruyeresia (Gastropoda: Abyssochrysoidea) species discovered from a serpentinite-hosted seep in the Southeastern Mariana Forearc
First seep-dwelling Desbruyeresia (Gastropoda: Abyssochrysoidea) species discovered from a serpentinite-hosted seep in the Southeastern Mariana Forearc
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DOI：
10.1080/13235818.2016.1172547
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发表时间：
2016-11-01
影响因子：
1
通讯作者：
Okutani, Takashi
中科院分区：
文献类型：
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作者：
Chen, Chong;Ogura, Tomomi;Okutani, Takashi
位于马里亚纳前弧东南部的南查莫罗海山(北纬13度47‘，东经146度00’)是该地区一系列蛇形泥火山之一，其顶端有一个活跃的流体渗漏区。在最近的一次研究巡航中，用化学自养双壳类动物采集了三个小型类菱形腹足动物的标本。随后的形态和分子研究表明，它是一新种，这里描述为Desruyeresia chamorrensis n.sp.虽然所有已知的标本都有一个严重腐蚀的顶端，因此无法观察到原海螺，但它的放射状特征与其他龙须菜物种的特征非常相似。使用细胞色素C氧化酶亚基I(COI)基因的系统发育重建也支持它在Desruyeresia中的位置。新种区别于所有其他已描述的同类，在硬螺上有更多的(17-20)轴向肋骨，并且该属有一个宽壳(壳宽高比0.6-0.65)。在此之前，只有热液喷口才能发现活的Desbroyeresis，这是已知的第一个栖息在渗漏或蛇纹石主持的化学合成habitats.http://zoobank.org/urn:lsid:zoobank.org:act:3BDA021E-45ED-439A-9D5D-402BBB29293E的物种。
The South Chamorro Seamount (13 degrees 47'N, 146 degrees 00'E) on the southeastern Mariana Forearc is one of a series of serpentine mud volcanoes in the area, and hosts an active fluid seepage area on its summit. During a recent research cruise three specimens of a small rissoid-like gastropod were collected with chemoautotrophic bivalves. Subsequent morphological and molecular investigations revealed it to be a novel species of Desbruyeresia (Abyssochrysoidea: Provannidae), described herein as Desbruyeresia chamorrensis n. sp. Although all known specimens had a heavily corroded apex, so the protoconch could not be observed, its radular characteristics are very similar to those of other Desbruyeresia species. Phylogenetic reconstruction using the cytochrome c oxidase subunit I (COI) gene also supports its placement within Desbruyeresia. The new species is distinguished from all other described congeners by having more numerous (17-20) axial ribs on the teleoconch, and a broad shell for the genus (shell width to height ratio 0.6-0.65). Living Desbruyeresia were previously only known from hydrothermal vents and this is the first species known to inhabit seeps or serpentinite-hosted chemosynthetic habitats.http://zoobank.org/urn:lsid:zoobank.org:act:3BDA021E-45ED-439A-9D5D-402BBB29293E