Molecular identity of the Antarctic heteronemertean Parborlasia corrugata (Nemertea : Pilidiophora) from Lützow-Holm Bay

• Published in: Polar Science
• Main Authors: Hookabe, Natsumi, Watanabe, Kentaro, Tsujimoto, Megumu, Kajihara, Hiroshi
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier
• Subjects: Antarctic; DNA barcode; Lineidae; Parborlasia corrugatus; Statistical parsimony network; 486; Lützow-Holm Bay; McIntosh; Southern Ocean; Syowa Station; The Antarctic; Antarc*; Polar Science; Sea ice
• Online Access: http://hdl.handle.net/2115/86858; https://doi.org/10.1016/j.polar.2020.100535

The Antarctic heteronemertean Parborlasia corrugata (McIntosh, 1876) (originally Lineus corrugatus) shows a circumpolar distribution in the Southern Ocean, putatively with high dispersal capacity of the planktonic larva. From the eastern coast of Lutzow-Holm Bay near Syowa Station (69 degrees 00'S, 39 degrees 35'E), several records of heteronemerteans have been made under the name of Lineus corrugatus. However, they have never been explicitly identified by molecular data. In the present study, we determined a partial sequence of the mitochondrial cytochrome c oxidase subunit I (COI) gene for 11 specimens of P. corrugata collected from depths of 17-27 m under sea ice near Syowa Station. A haplotype-network analysis along with other COI sequences from 66 individuals collected at different places in the Antarctic and sub-Antarctic islands, available at public databases, resulted in that all the 11 specimens from Lutzow-Holm Bay possessed either of two major haplotypes detected in previous studies. It reflects the effective dispersal of the species between the localities including Lutzow-Holm Bay.