Taxonomy and phylogeny of Lineus torquatus and allies (Nemertea, Lineidae) with descriptions of a new genus and a new cryptic species. Issue 1 (2nd January 2018)
- Record Type:
- Journal Article
- Title:
- Taxonomy and phylogeny of Lineus torquatus and allies (Nemertea, Lineidae) with descriptions of a new genus and a new cryptic species. Issue 1 (2nd January 2018)
- Main Title:
- Taxonomy and phylogeny of Lineus torquatus and allies (Nemertea, Lineidae) with descriptions of a new genus and a new cryptic species
- Authors:
- Chernyshev, Alexei V.
Polyakova, Neonila E.
Turanov, Sergei V.
Kajihara, Hiroshi - Abstract:
- Abstract : The heteronemertean genus Lineus Sowerby, 1806 has been badly in need of revision because of its apparent non-monophyly. In this paper, we focus on Lineus torquatus Coe, 1901, one of the heteronemertean species that occur commonly in waters around the North Pacific, as well as a few other allied species distributed in the western North Pacific, including Lineus alborostratus Takakura, 1898 and Cerebratulus montgomeryi Coe, 1901. Based on phylogenetic analyses using 16S, COI, 28S, 18S, and H3 gene and ITS sequences, we detected a well-supported clade comprised of heteronemerteans with a frontal white band on the head, to which we add Kulikovia gen. nov. This genus is nested within a more comprehensive, highly supported clade, here named the Siphonenteron -clade, which contains Tenuilineus bicolour (Verrill, 1892), Lineus flavescens Coe, 1905, Siphonenteron bilineatum (Renier, 1804), S. cf. bilineatum, Lineus cf. caputornatus, and Lineus sp. from Guam. Our analyses confirmed the presence of a cryptic species of what was formerly known as the cherry-red and reddish forms of Lineus torquatus, herein described as Kulikovia manchenkoi sp. nov. based on some external characters, internal morphology, and the four genetic markers ( COI, 16S, H3, and ITS ). In contrast to the species pair K. torquata – K. manchenkoi, the reddish form of K. alborostrata does not differ genetically from the typical form of this species. The significance of the external and internal charactersAbstract : The heteronemertean genus Lineus Sowerby, 1806 has been badly in need of revision because of its apparent non-monophyly. In this paper, we focus on Lineus torquatus Coe, 1901, one of the heteronemertean species that occur commonly in waters around the North Pacific, as well as a few other allied species distributed in the western North Pacific, including Lineus alborostratus Takakura, 1898 and Cerebratulus montgomeryi Coe, 1901. Based on phylogenetic analyses using 16S, COI, 28S, 18S, and H3 gene and ITS sequences, we detected a well-supported clade comprised of heteronemerteans with a frontal white band on the head, to which we add Kulikovia gen. nov. This genus is nested within a more comprehensive, highly supported clade, here named the Siphonenteron -clade, which contains Tenuilineus bicolour (Verrill, 1892), Lineus flavescens Coe, 1905, Siphonenteron bilineatum (Renier, 1804), S. cf. bilineatum, Lineus cf. caputornatus, and Lineus sp. from Guam. Our analyses confirmed the presence of a cryptic species of what was formerly known as the cherry-red and reddish forms of Lineus torquatus, herein described as Kulikovia manchenkoi sp. nov. based on some external characters, internal morphology, and the four genetic markers ( COI, 16S, H3, and ITS ). In contrast to the species pair K. torquata – K. manchenkoi, the reddish form of K. alborostrata does not differ genetically from the typical form of this species. The significance of the external and internal characters for distinguishing cryptic species is discussed. http://zoobank.org/urn:lsid:zoobank.org:pub:9BECBC60-9C82-48EC-AD36-FC564D82A5BC http://zoobank.org/urn:lsid:zoobank.org:act:D02B2339-4F65-4517-9B13-DD4AAB0C55C5 http://zoobank.org/urn:lsid:zoobank.org:act:8D239B62-E655-4721-90F0-A4944DD8A3C7 … (more)
- Is Part Of:
- Systematics and biodiversity. Volume 16:Issue 1(2018)
- Journal:
- Systematics and biodiversity
- Issue:
- Volume 16:Issue 1(2018)
- Issue Display:
- Volume 16, Issue 1 (2018)
- Year:
- 2018
- Volume:
- 16
- Issue:
- 1
- Issue Sort Value:
- 2018-0016-0001-0000
- Page Start:
- 55
- Page End:
- 68
- Publication Date:
- 2018-01-02
- Subjects:
- biodiversity -- cryptic species -- marine invertebrates -- new genus -- phylogeny -- ribbon worms -- taxonomy
Biodiversity -- Periodicals
Biology -- Classification -- Periodicals
Natural history -- Periodicals
Biodiversity
Biology
Classification
Periodicals
578 - Journal URLs:
- http://journals.cambridge.org/action/displayJournal?jid=SYS ↗
http://journals.cambridge.org/JID_SYS ↗
http://www.tandfonline.com/toc/tsab20/current ↗
http://www.tandfonline.com/ ↗ - DOI:
- 10.1080/14772000.2017.1317672 ↗
- Languages:
- English
- ISSNs:
- 1478-0933
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 5445.xml