Taxonomic status of deep-sea sharks Deania calceus and D. hystricosa (Centrophoridae)

The taxonomic status and identification of the deep-sea sharks of the genus Deania have been controversial mainly due to morphological similarities between some of its species. The aim of this work was to update the taxonomic status of Deania hystricosa (and other putative species, such as D. calceu...

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Published in:Regional Studies in Marine Science
Main Authors: Marrero, M., Pascual-Alayón, Pedro José, Martín, María Virginia, Casañas-Machin, Iván, Freitas, M., Hernández, M.
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2023
Subjects:
COI
Online Access:http://hdl.handle.net/10261/350027
https://doi.org/10.1016/j.rsma.2023.103220
https://api.elsevier.com/content/abstract/scopus_id/85173938925
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spelling ftcsic:oai:digital.csic.es:10261/350027 2024-06-23T07:55:05+00:00 Taxonomic status of deep-sea sharks Deania calceus and D. hystricosa (Centrophoridae) Marrero, M. Pascual-Alayón, Pedro José Martín, María Virginia Casañas-Machin, Iván Freitas, M. Hernández, M. 2023-12-20 http://hdl.handle.net/10261/350027 https://doi.org/10.1016/j.rsma.2023.103220 https://api.elsevier.com/content/abstract/scopus_id/85173938925 en eng Elsevier Regional Studies in Marine Science Publisher's version https://doi.org/10.1016/j.rsma.2023.103220 Sí Regional Studies in Marine Science 67 : 103220 (2023) http://hdl.handle.net/10261/350027 doi:10.1016/j.rsma.2023.103220 2352-4855 2-s2.0-85173938925 https://api.elsevier.com/content/abstract/scopus_id/85173938925 open 16S rRNA COI Dermal denticles Elasmobranchs Taxonomy artículo http://purl.org/coar/resource_type/c_6501 2023 ftcsic https://doi.org/10.1016/j.rsma.2023.103220 2024-05-29T00:07:14Z The taxonomic status and identification of the deep-sea sharks of the genus Deania have been controversial mainly due to morphological similarities between some of its species. The aim of this work was to update the taxonomic status of Deania hystricosa (and other putative species, such as D. calceus and D. profundorum) and the validity as a true taxa using specimens from the Atlantic (East-Central and Southeast) and the North Atlantic (Cantabrian Sea) as determined by analysis of sequences of COI and 16 S rRNA genes and comparative analysis of meristics of skin on different body parts. Traditionally, individuals of the genus Deania, including D. hystricosa, D. quadrispinosa, D. calceus and D. profundorum, were classified according to the length of the denticle crown. In our study, this character was found to be significantly dependent on the sexual maturity stage or length of the individual and the area of the body where the denticles were taken. Here, 23 individuals of these species were caught during campaigns carried out in the Atlantic Ocean (East-Central and Southeast) and in the North Atlantic (Cantabrian Sea), in order to be analysed for the mitochondrial genes 16 S ribosomal RNA (16 S rRNA) and cytochrome oxidase subunit I (COI). Phylogenetic analysis of concatenated sequences showed two clearly differentiated groups: one consisting of the species D. profundorum, and the other one consisting of the species belonging to D. calceus and D. hystricosa. The genetic differences measured between D. profundorum group and calceus-hystricosa group (3.9%) were within the range of congeneric species, whereas those differences obtained between D. calceus and D. hystricosa (0.2%) were within the range of intraspecific variation of any of the 3 species analyzed. These results suggest that D. calceus and D. hystricosa are synonyms. Peer reviewed Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Regional Studies in Marine Science 67 103220
institution Open Polar
collection Digital.CSIC (Spanish National Research Council)
op_collection_id ftcsic
language English
topic 16S rRNA
COI
Dermal denticles
Elasmobranchs
Taxonomy
spellingShingle 16S rRNA
COI
Dermal denticles
Elasmobranchs
Taxonomy
Marrero, M.
Pascual-Alayón, Pedro José
Martín, María Virginia
Casañas-Machin, Iván
Freitas, M.
Hernández, M.
Taxonomic status of deep-sea sharks Deania calceus and D. hystricosa (Centrophoridae)
topic_facet 16S rRNA
COI
Dermal denticles
Elasmobranchs
Taxonomy
description The taxonomic status and identification of the deep-sea sharks of the genus Deania have been controversial mainly due to morphological similarities between some of its species. The aim of this work was to update the taxonomic status of Deania hystricosa (and other putative species, such as D. calceus and D. profundorum) and the validity as a true taxa using specimens from the Atlantic (East-Central and Southeast) and the North Atlantic (Cantabrian Sea) as determined by analysis of sequences of COI and 16 S rRNA genes and comparative analysis of meristics of skin on different body parts. Traditionally, individuals of the genus Deania, including D. hystricosa, D. quadrispinosa, D. calceus and D. profundorum, were classified according to the length of the denticle crown. In our study, this character was found to be significantly dependent on the sexual maturity stage or length of the individual and the area of the body where the denticles were taken. Here, 23 individuals of these species were caught during campaigns carried out in the Atlantic Ocean (East-Central and Southeast) and in the North Atlantic (Cantabrian Sea), in order to be analysed for the mitochondrial genes 16 S ribosomal RNA (16 S rRNA) and cytochrome oxidase subunit I (COI). Phylogenetic analysis of concatenated sequences showed two clearly differentiated groups: one consisting of the species D. profundorum, and the other one consisting of the species belonging to D. calceus and D. hystricosa. The genetic differences measured between D. profundorum group and calceus-hystricosa group (3.9%) were within the range of congeneric species, whereas those differences obtained between D. calceus and D. hystricosa (0.2%) were within the range of intraspecific variation of any of the 3 species analyzed. These results suggest that D. calceus and D. hystricosa are synonyms. Peer reviewed
format Article in Journal/Newspaper
author Marrero, M.
Pascual-Alayón, Pedro José
Martín, María Virginia
Casañas-Machin, Iván
Freitas, M.
Hernández, M.
author_facet Marrero, M.
Pascual-Alayón, Pedro José
Martín, María Virginia
Casañas-Machin, Iván
Freitas, M.
Hernández, M.
author_sort Marrero, M.
title Taxonomic status of deep-sea sharks Deania calceus and D. hystricosa (Centrophoridae)
title_short Taxonomic status of deep-sea sharks Deania calceus and D. hystricosa (Centrophoridae)
title_full Taxonomic status of deep-sea sharks Deania calceus and D. hystricosa (Centrophoridae)
title_fullStr Taxonomic status of deep-sea sharks Deania calceus and D. hystricosa (Centrophoridae)
title_full_unstemmed Taxonomic status of deep-sea sharks Deania calceus and D. hystricosa (Centrophoridae)
title_sort taxonomic status of deep-sea sharks deania calceus and d. hystricosa (centrophoridae)
publisher Elsevier
publishDate 2023
url http://hdl.handle.net/10261/350027
https://doi.org/10.1016/j.rsma.2023.103220
https://api.elsevier.com/content/abstract/scopus_id/85173938925
genre North Atlantic
genre_facet North Atlantic
op_relation Regional Studies in Marine Science
Publisher's version
https://doi.org/10.1016/j.rsma.2023.103220

Regional Studies in Marine Science 67 : 103220 (2023)
http://hdl.handle.net/10261/350027
doi:10.1016/j.rsma.2023.103220
2352-4855
2-s2.0-85173938925
https://api.elsevier.com/content/abstract/scopus_id/85173938925
op_rights open
op_doi https://doi.org/10.1016/j.rsma.2023.103220
container_title Regional Studies in Marine Science
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