Molecular taxonomy and naming of five cryptic species of Alviniconcha snails (Gastropoda: Abyssochrysoidea) from hydrothermal vents
Molecular taxonomy and naming of five cryptic species of Alviniconcha snails (Gastropoda: Abyssochrysoidea) from hydrothermal vents
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DOI：
10.1080/14772000.2014.970673
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发表时间：
2015-05-04
影响因子：
1.9
通讯作者：
Vrijenhoek, Robert C.
中科院分区：
文献类型：
--
作者：
Johnson, Shannon B.;Waren, Anders;Vrijenhoek, Robert C.
Alviniconcha 属的大型共生蜗牛（腹足纲：Abyssochrysidae）是西太平洋和印度洋热液喷口的主要居民之一。该属最初被描述为单型的，但线粒体基因的独特 DNA 序列揭示了六种不同的进化谱系，我们无法根据外部形态来区分它们。这些独特的异域和同域谱系被归入 Alviniconcha hessleri Okutani & Ohta 的名称之下，它们被赋予了占位符绰号，这使得科学交流变得复杂。基于目前的多基因序列数据，我们特此描述了五个 Alviniconcha 物种（按发现顺序） - A. kojimai sp。十一月，A. boucheti sp。十一月，A. marisindica sp。十一月，A. strummeri sp。十一月和 A. adamantis sp。十一月因此，我们将名称 A. hessleri 的应用限制为与马里亚纳海槽地区发现的样本在遗传上相似（COI ≥ 95%）的样本。单一不同的 Alviniconcha 物种栖息在中印度洋脊、马里亚纳火山弧和马里亚纳弧后盆地沿线的喷口区，而马努斯、斐济和劳弧后盆地的喷口可能栖息着另外两到三个物种。对这些物种的正式认可有助于未来评估它们的生理差异和共生关系的尝试。此外，它们报告的分布具有重要的生物地理意义，影响对印度-太平洋喷口地点内部多样性和重叠的估计。[图形]
Large symbiont-hosting snails of the genus Alviniconcha (Gastropoda: Abyssochrysidae) are among the dominant inhabitants of hydrothermal vents in the Western Pacific and Indian oceans. The genus was originally described as monotypic, but unique DNA sequences for mitochondrial genes revealed six distinct evolutionary lineages that we could not distinguish based on external morphology. Subsumed under the name Alviniconcha hessleri Okutani & Ohta, the distinct allopatric and sympatric lineages have been assigned placeholder epithets that complicate scientific communications. Based on the present multi-gene sequence data, we hereby describe five Alviniconcha species (in the order of their discovery) - A. kojimai sp. nov., A. boucheti sp. nov., A. marisindica sp. nov., A. strummeri sp. nov. and A. adamantis sp. nov. Thus, we restrict application of the name A. hessleri to specimens that are genetically similar (>= 95% for COI) to those found at localities in the Mariana Trough. Single distinct Alviniconcha species inhabit vent fields along the Central Indian Ridge, the Mariana volcanic arc, and the Mariana back-arc basin, whereas vents in the Manus, Fiji and Lau back-arc basins may host two or three additional species. Formal recognition of these species facilitates future attempts to assess their physiological differences and symbiont associations. Furthermore, their reported distributions have significant biogeographic implications, affecting estimates of the diversity within and overlap among Indo-Pacific vent localities.[GRAPHICS]