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n2:313551

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schema:CreativeWork bibo:Document

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Zaharias <i>et al.</i> (2020)

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schema:datePublished

2020-01-01

dct:title

Zaharias <i>et al.</i> (2020)

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_:vb70020226

dct:abstract

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 genus Cryptogemma (Gastropoda: Conoidea: Turridae), a group of deep-sea snails with a wide geographical distribution, primarily by using the mitochondrial COI gene. 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 eight Cryptogemma species 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 powelli sp. nov. We discuss the possible reasons underlying the apparent overdescription of species within Cryptogemma, which is shown here to constitute a rare case of DNA-based species lumping in the hyper-diversified superfamily Conoidea.

bibo:abstract

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 genus Cryptogemma (Gastropoda: Conoidea: Turridae), a group of deep-sea snails with a wide geographical distribution, primarily by using the mitochondrial COI gene. 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 eight Cryptogemma species 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 powelli sp. nov. We discuss the possible reasons underlying the apparent overdescription of species within Cryptogemma, which is shown here to constitute a rare case of DNA-based species lumping in the hyper-diversified superfamily Conoidea.

dct:issued

2020-01-01

dct:bibliographicCitation

Zaharias, P., Kantor, Y.I., Fedosov, A.E., Criscione, F., Hallan, A., Kano, Y., Bardin, J. &amp; Puillandre, N. 2020. Just the once will not hurt: DNA suggests species lumping over two oceans in deep-sea snails (<em>Cryptogemma</em>). <em>Zoological Journal of the Linnean Society</em>

bibo:doi

10.1093/zoolinnean/zlaa010/5802562

Subject Item

_:vb70020226

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schema:PropertyValue

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n8:P356

schema:value

10.1093/zoolinnean/zlaa010/5802562