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Title: Molecular phylogenetic assessment of Spirobranchus kraussii-complex (Annelida: Serpulidae) from the Japanese Archipelago
Authors: Kobayashi, Genki
Goto, Ryutaro  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-5425-9603 (unconfirmed)
Author's alias: 小林, 元樹
後藤, 龍太郎
Keywords: Phylogeography
Polychaetes
Ryukyu Islands
Tokara Gap
Species complex
Issue Date: 14-Jul-2021
Publisher: PeerJ
Journal title: PeerJ
Volume: 9
Thesis number: e11746
Abstract: Spirobranchus kraussii (Annelida: Serpulidae) was recognized as being widely distributed both in the Pacific and Atlantic Oceans. However, the sampling records far from its type locality (South Africa) have been questioned. Actually, recent molecular phylogenetic studies showed that S. kraussii contains genetically distinct species. In this study, we performed molecular phylogenetic analyses of S. cf. kraussii collected from Japan using the nucleotide sequences of a mitochondrial gene and two nuclear genes. Three lineages were recovered within Spirobranchus kraussii-complex in Japan, and one (Spirobranchus sp. 6) showed moderate genetic difference (approximately 4%) in the mitochondrial cytb gene sequence from Spirobranchus sp. 1, an undescribed sequenced species from Honshu Island, Japan. However, the nucleotide sequences of the 18S rRNA gene and ITS2 region were nearly indistinguishable. The other lineage was clearly distinct from the other previously sequenced species and is thus considered to be another distinct species of this species complex (Spirobranchus sp. 5). Although detailed morphological assessment of these lineages is necessary to define their taxonomic status, the present study provided further implications for the species diversity within the S. kraussii-complex.
Rights: © 2021 Kobayashi and Goto
This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
URI: http://hdl.handle.net/2433/274012
DOI(Published Version): 10.7717/peerj.11746
PubMed ID: 34316401
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