Just the once will not hurt: DNA suggests species lumping over two oceans in deep-sea snails
Just the once will not hurt: DNA suggests species lumping over two oceans in deep-sea snails
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一次不会有什么害处：DNA表明深海蜗牛中的物种集中在两个海洋上
DOI：
10.1093/zoolinnean/zlaa010
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发表时间：
2020
影响因子：
2.8
通讯作者：
J. Bardin & N. Puillandre
中科院分区：
文献类型：
--
作者：
Zaharias;P.;Y.I. Kantor;A. Fedosov;F. Criscione;A. Hallan;Y. Kano;J. Bardin & N. Puillandre
使用分子数据进行物种界定的实践通常会导致物种复合体的揭示和界定物种数量的增加。然而，在少数情况下，基于 DNA 的分类法导致将之前描述的物种混为一谈。在这里，我们主要通过线粒体 COI 基因来界定隐螺属（腹足纲：Conoidea：turridae）中的物种，这是一组地理分布广泛的深海蜗牛。应用三种物种界定方法（ABGD、mPTP 和 GMYC）来定义物种分区。所有方法都产生了八个物种。根据之前的分类学研究和贝壳形态，23 个可用名称可能适用于本文所识别的 8 个隐胚种。贝壳形态测量、齿状特征以及地理和水深分布被用来将模式标本与这些界定的物种联系起来。总之，这些可用名称中的 23 个被归属于 7 个物种，产生 16 个同义词，其中一个物种被描述为新物种：Cryptogemma powellisp。 11月。我们讨论了对 Cryptogemma 内物种明显过度描述的可能原因，此处显示的 Cryptogemma 构成了高度多样化的 Conoidea 超科中基于 DNA 的物种的罕见案例。
The practice of species delimitation using molecular data commonly leads to the revealing of species complexes and an increase in the number of delimited species. In a few instances, however, DNA-based taxonomy has led to lumping together of previously described species. Here, we delimit species in the genusCryptogemma(Gastropoda: Conoidea: Turridae), a group of deep-sea snails with a wide geographical distribution, primarily by using the mitochondrialCOIgene. Three approaches of species delimitation (ABGD, mPTP and GMYC) were applied to define species partitions. All approaches resulted in eight species. According to previous taxonomic studies and shell morphology, 23 available names potentially apply to the eightCryptogemmaspecies that were recognized herein. Shell morphometrics, radular characters and geographical and bathymetric distributions were used to link type specimens to these delimited species. In all, 23 of these available names are here attributed to seven species, resulting in 16 synonymizations, and one species is described as new:Cryptogemma powellisp. nov.We discuss the possible reasons underlying the apparent overdescription of species withinCryptogemma, which is shown here to constitute a rare case of DNA-based species lumping in the hyper-diversified superfamily Conoidea.