On Anguillosyllis cf. hessleri Maciolek, 2020 – A species complex from the Clarion-Clipperton zone, abyssal central Pacific
Neal, Lenka Wiklund, Helena Stewart, Eva CD Rabone, Muriel Boolukos, Corie Clatworthy, Innes Jungmanova, Zuzana Dahlgren, Thomas G
Neal, Lenka
Wiklund, Helena
Stewart, Eva CD
Rabone, Muriel
Boolukos, Corie
Clatworthy, Innes
Jungmanova, Zuzana
Dahlgren, Thomas G
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2025-04-02
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2024-04-09
Subject Terms
CCZ
deep-sea mining
taxonomic novelty
pseudocryptic species
biodiversity
haplotype network
COI
deep-sea mining
taxonomic novelty
pseudocryptic species
biodiversity
haplotype network
COI
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Abstract
The benthic annelid fauna of polymetallic nodule fields in the eastern Clarion-Clipperton Zone (CCZ) has recently been the subject of taxonomic investigations aiming to document the biodiversity of this region. While investigating the annelids, a particularly high diversity was discovered within the genus Anguillosyllis Day, 1963 using a combination of morphological and molecular approaches. Initially, 38 specimens of Anguillosyllis were assigned to the known CCZ species Anguillosyllis hessleri Maciolek, 2020 based on morphological examination, including examination of the type specimen. However, our genetic data revealed that these specimens represent four distinct lineages (putative species) based on COI and 16S markers. Further morphological investigation using SEM revealed a complex structure of the prostomium, which could potentially differentiate these lineages. However, as no molecular or SEM data are available from the type specimen of A. hessleri, we cannot ascertain which, if any, of these lineages represent the known species described by Maciolek (2020). Thus, currently, we can only assign CCZ specimens to Anguillosyllis cf. hessleri and further distinguish the lineages by assigning each a unique code in the form of “NHM_####”. The SEM observations are the first reported for Anguillosyllis, revealing new taxonomic characters that may be used to disentangle the A. hessleri species complex and be of use in taxonomy of Anguillosyllis in general.
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Regan Drennan, Lenka Neal, Helena Wiklund, Eva C.D. Stewart, Muriel Rabone, Corie Boolukos, Innes Clatworthy, Zuzana Jungmanova, Thomas G. Dahlgren, Adrian G. Glover, On Anguillosyllis cf. hessleri Maciolek, 2020 – A species complex from the Clarion-Clipperton zone, abyssal central Pacific, Deep Sea Research Part I: Oceanographic Research Papers, Volume 220, 2025, 104453, ISSN 0967-0637, https://doi.org/10.1016/j.dsr.2025.104453.
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Copyright © 2025 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). The linked file is the published version of the article.
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0967-0637
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