- 著者
- Hiroaki Tosuji Kiho Nishinosono Hwey-Lian Hsieh Christopher J. Glasby Takeru Sakaguchi Masanori Sato
- 出版者
- The Plankton Society of Japan, The Japanese Association of Benthology
- 雑誌
- Plankton and Benthos Research (ISSN:18808247)
- 巻号頁・発行日
- vol.14, no.4, pp.287-302, 2019-11-27 (Released:2019-11-25)
- 参考文献数
- 39
- 被引用文献数
- 10 12
Taxonomic reexamination of Japanese populations of the Perinereis nuntia species group, which constitutes a major polychaete component in intertidal benthic communities, was carried out by analyzing the mitochondrial 16S rDNA and the nuclear ribosomal ITS sequences of 80 specimens, newly collected from 27 sites in Japan, together with 18 museum-preserved specimens collected from southern neighboring countries outside Japan. The Japanese populations of the Perinereis nuntia species group could be divided into four genetically different groups, which corresponded morphologically to four nominal species (P. mictodonta, P. wilsoni, P. shikueii, and P. nuntia), with some exceptions. Perinereis nuntia and P. shikueii were recorded as new to the Japanese fauna, with their distributions restricted to southern Japan. The clade containing P. shikueii was subdivided into two sister clades (forms A and B), indicating that cryptic speciation has occurred within this clade. Our results revealed a remarkable variability in the number of bars in area VI of the proboscis in form B of P. shikueii, which appeared to be caused by breakage of the long bar into short bars during growth from a juvenile to an adult.