Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
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来自东太平洋热液喷口和甲烷渗漏的 Laminatubus（Serpulidae、Annelida），以及两个新物种的描述
DOI：
10.11646/zootaxa.4915.1.1
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发表时间：
2021
期刊：
影响因子：
0.9
通讯作者：
KUPRIYANOVA, ELENA K.
中科院分区：
文献类型：
--
作者：
ROUSE, GREG W.;KUPRIYANOVA, ELENA K.
半深海蛇形目Laminatubus alvini ten霍韦和Zibrowius，1986年在加拉帕戈斯裂谷热液喷口外围发现，东太平洋海隆其他喷口群落也有记录。在这里，我们评估了从东太平洋热液喷口和甲烷渗漏使用DNA序列和形态学的serpulids收集的生物多样性。从加州湾南部的Alarcon Rise喷口（~ 23 N）到EPR上38 S的至少一个点，Laminatubus alvini在很宽的地理范围内几乎没有遗传变异。来自哥斯达黎加和加州湾（墨西哥）的几个甲烷渗漏样品在DNA序列数据上与Laminatubus alvini的明显不同，并且具有7个胸毛，缺乏Spirobranchus型特殊领毛，因此适合Neovermilia的诊断。分子系统发育分析表明，L. alvini和渗出标本形成一个支持良好的分支。此外，渗漏标本中有一个最小的~ 7%的距离，线粒体细胞色素B序列之间的浅水（1000米）渗漏分支仅限于哥斯达黎加和深水分支（1800米）从哥斯达黎加到加州湾。我们在这里把渗漏分类群描述为形态上难以区分的L。保罗布鲁克西sp.和L.乔伊斯布鲁克塞sp.
The bathyal serpulid Laminatubus alvini ten Hove & Zibrowius, 1986 was described from the periphery of hydrothermal vents of the Galapagos Rift and has been recorded from other vent communities of the East Pacific Rise (EPR). Here we assessed the biodiversity of serpulids collected from eastern Pacific hydrothermal vents and methane seeps using DNA sequences and morphology. Laminatubus alvini showed little genetic variation over a wide geographic range from the Alarcon Rise vents in southern Gulf of California (~ 23 N), to at least a point at 38 S on the EPR. Specimens from several methane seeps off Costa Rica and the Gulf of California (Mexico) differed markedly from those of Laminatubus alvini on DNA sequence data and in having seven thoracic chaetigers and lacking Spirobranchus-type special collar chaetae, thus fitting the diagnosis of Neovermilia. However, phylogenetic analysis of molecular data showed that L. alvini and the seep specimens form a well-supported clade. Moreover, among the seep specimens there was minimally a~ 7% distance in mitochondrial cytochrome b sequences between a shallow-water (1000 m) seep clade restricted to Costa Rica and a deep-water clade (1800 m) from Costa Rica to Gulf of California. We describe the seep taxa here as morphologically indistinguishable L. paulbrooksi n. sp. and L. joycebrooksae n. sp.