Integrative taxonomy reveals new Australian species of the deep-water snail genera Comispira (Conoidea: Cochlespiridae) and Leucosyrinx (Conoidea: Pseudomelatomidae)
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A series of deep-sea expeditions in southeastern Australia has produced a considerable amount of conoidean (Gastropoda: Neogastropoda) material suitable for molecular and morpho-anatomical study. Previous and ongoing studies have revealed the Raphitomidae to be particularly diverse in the deep waters of this region. Here, we continue our conoidean investigation, focussing on the genera Comispira (Cochlespiridae) and Leucosyrinx (Pseudomelatomidae). We subjected two cytochrome oxidase subunit DNA sequence datasets of Conoidea to Automatic Barcode Gap Discovery (ABGD), which recognised a total of 18 primary species hypotheses (PSHs) among our target genera as well as from the cochlespirid genera Sibogasyrinx and Aforia. Following additional evaluation of shell and radular features, as well as examination of geographic and bathymetric ranges (conducted for PSHs of Australian waters), eight of these PSHs were converted to secondary species hypotheses (SSHs). Of these, three SSHs (one Comispira species, two Leucosyrinx spp.) were recognised as new to science and their full systematic descriptions are provided herein. While we discuss the relatively low diversity of Cochlespiridae compared to most conoidean families, two Comispira species and one species of Aforia are here recorded for the first time from Australian waters. http://zoobank.org/urn:lsid:zoobank.org:pub:0D342202-1901-4379-9EA8-6E7C1A4AAD7B
澳大利亚东南部的多组深海科考航次采集到了大量锥总科（Conoidean，腹足纲：新腹足目）标本，可用于分子生物学与形态解剖学研究。既往及正在推进的研究显示，卷管螺科（Raphitomidae）在该区域的深水水域中物种多样性尤为突出。本研究延续此前的锥总科类群考察工作，重点聚焦于梳螺属（Comispira，螺旋螺科（Cochlespiridae））与亮螺属（Leucosyrinx，拟纺锤螺科（Pseudomelatomidae））。我们将两份锥总科细胞色素氧化酶亚基DNA序列数据集提交至自动条形码间隙发现算法（Automatic Barcode Gap Discovery，ABGD）进行分析，该算法在目标属以及螺旋螺科的西博加螺属（Sibogasyrinx）和阿佛里亚螺属（Aforia）中，共识别出18个初级物种假说（Primary Species Hypotheses，PSHs）。在对贝壳、齿舌特征开展额外评估，并针对澳大利亚水域的初级物种假说完成地理与水深分布范围核查后，其中8个初级物种假说被修订为次级物种假说（Secondary Species Hypotheses，SSHs）。其中3个次级物种假说对应1种梳螺属物种、2种亮螺属物种，被认定为科学新类群，本文将对其提供完整的系统分类学描述。尽管本文讨论了螺旋螺科相较于多数锥总科类群较低的物种多样性，但本次研究首次在澳大利亚水域记录到2种梳螺属物种及1种阿佛里亚螺属物种。http://zoobank.org/urn:lsid:zoobank.org:pub:0D342202-1901-4379-9EA8-6E7C1A4AAD7B
