タマシキゴカイ科環形動物2種の利尻島初記録と 日本におけ …

1 Rishiri Studies (37): 95-100, March 2018 Arenicolidae Johnson, 1835 Abarenicola Wells, 1959 Arenicola Lamarck, 1801 Arenicolides Mesnil, 1898 Branchiomaldane Langerhans, 1881 4 30 Darbyshire, 2017 Arenicola brasiliensis Nonato, 1958 2 1) 2) 1) 3) 1)1) 277-8564 5-1-5 2) 028-3694 2-1-1 3) 060-0810 10 8 INew Records of Two Arenicolid Species (Annelida: Arenicolidae) from Rishiri Island, Northern Japan with a Brief Review of Previous Records of Japanese ArenicolidsGenki Kobayashi1), Hirokazu Abe2), Hajime Itoh1), Shinri Tomioka3) and Shigeaki Kojima1)1)Benthos Section, Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8564, Japan2)Department of Biology, Center for Liberal Arts & Sciences, Iwate Medical University, Nishitokuta 2-1-1, Yahaba-cho, Shiwa-gun, Iwate 028-3694, Japan3)Biodiversity I, Faculty of Science, Hokkaido University, N10 W8, Kita-ku, Sapporo, Hokkaido 060-0810, JapanAbstract.

2 In 2017, two annelid species of the family Arenicolidae, , Abarenicola claparedi oceanica and Arenicola cf. cristata, were collected and are new to the coastal fauna of Rishiri Island, northern Japan. Many fecal mounds produced by arenicolids were observed only at Numaura Beach and not at seven other localities. In addition to these new records, briefly reviewed are previous records of arenicolids in Japan. Two species of arenicolids (Abarenicola pacifica and Arenicola brasiliensis) are widely distributed in Ja-pan, whereas the others (Branchiomaldane simplex, Ab. claparedi oceanica, and Ar. cf. cristata) have been recorded only from Hokkaido, northern Japan. Japanese names were proposed for the four genera of the family and the two species which have been recorded from pacifica Healy & Wells, 1959 Abarenicola claparedi oceanica Healy & Wells, 1959 Branchiomaldane simplex Berkeley & Berkeley, 1932 3 4 1 Imajima, 1988 4 "Arenicola caroledna Wells, 1961" "Arenicola claparedi Levinsen, 1884" Arenicola cristata Stimpson, 1856 1933; Takahashi, 1934; Wells, 1962; Imajima & 96 Hartman, 1964 Takahashi 1934 Arenicola claparedi Ab.

3 Pacifi ca Imajima & Hartman, 1964; Hartman, 1969 Arenicola cristata 1933; Takahashi, 1934 Arenicola caroledna Wells, 1962; Imajima & Hartman, 1964 Ar. caroledna Ar. brasiliensis Wells 1963 Wells 1962 Imajima & Hartman 1964 Ar. cristata Ar. caroledna Okuda, 1938; Okuda & Yamada, 1954 Ar. cristata Ar. cristata Ar. brasiliensis 1965 1992 1956 Ar. cristata Ar. brasiliensis cm U Woodin, 1986 Hutchings, 2000 1 A Imajima & Hartman, 1964.

4 Okuda, 1938 B 1 Abarenicola Wells, 1959 Abarenicola pacifi ca Healy & Wells, 1959 Okuda 1938 2000 Abarenicola claparedi oceanica (Healy & Wells, 1959) Imajima & Hartman 1964 Arenicola Lamarck, 1801 Arenicola brasiliensis Nonato, 1958 Takahashi 1934 Arenicola cf. cristata Branchiomaldane Langerhans, 1881 Branchiomaldane simplex (Berkeley & Berkeley, 1932) Imajima 1988 97 2 1 2003 2017 2 2017 8 4 <1m 45 06'57''N, 141 17'18''E 1 30cm 1mm 4 1 70% RTMANL001 2 EOS Kiss X8i, Canon EOS Kiss X4, Canon 1 3m STYLUS TG-4 Tough.

5 Olympus 3 16S RNA = 16S rRNA GenBank 2 7 7cm 2A 2B 1B 2003 4 1 2 RTMANL001 13 3A 1 11 3D 3 1mm 13 Hartman, 1969; Fournier & Barrie, 1987 11 13 Hartman, 1969 Oesophagal caeca* 7 8 3B Nephridia Nephridiopore* Hood 3C Hood 6 2 A 70mm B 98 16S rRNA 346 3B 3A Imajima & Hartman, 1964 2 Healy & Wells, 1959 16S rRNA 346 GenBank Ar.

6 Cristata GenBank Ar. cristata Ar. cristata Arenicola cf. cristata Ar. cristata Ar. cristata 3 1 8 1 Okuda, 1938; 1960 Okuda & Yamada, 1954 2004 1960 Takahashi, 1934 GBIF Secretariat, 2016 2000 2014 Huang et al., 1994 Paik, 1979 *: Nephridiopore Oesophagal caeca 3 A C D Arenicola cf. cristata A B RTMANL001 C 6 7 D Prs = Th = Ca = Br = OC = Ne = B D 2 Healy & Wells, 1959; GBIF Secretariat, 2016 Takahashi, 1934 1960; 1956 Wells, 1963 Imajima, 1988 Fournier & Barrie, 1987 Wells, 1963.

7 Wells, 1964 Cowen & Sponaugle, 2009 Okuda, 1938; Okuda, 1946; 2006 2017 Cowen, R. K. & S. Sponaugle, 2009. Larval disper-sal and marine population connectivity. Annual Review of Marine Science, 1: 443 , T., 2017. A re-evaluation of the Abarenicola assimilis group with a new species from the Falkland Islands and key to species.

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9 Fauna of Australia. Vol. 4A Polychaeta, Myzostomida, Pogonophora, Echiura, Sipuncula: 62 67. CSIRO Publishing, Melbourne. 2014 69(1): 1 17. 1965 123. [ ] 523 Imajima, M., 1988. Occurrence of Branchiomaldane simplex (Polychaeta, Arenicolidae) from Hokkaido, Japan. Bulletin of the National Science Museum. Series A, Zoology, 14: 23 , M. & O. Hartman, 1964. The polychaetous annelids of Japan. Part II. Allan Hancock Founda tion Publications, Occasional Paper, 26: 239 452. 2003 (22): 41 47. 2004 (25): 47 48. 2000 Actinia: Bulletin of the Manazuru Marine Laboratory for Science Educa tion, Faculty of Education and Human Sciences, Yokohama National University, (13): 13 19.

10 1960 IV 247 , S., 1938. Notes on the spawning habit of Arenicola claparedii Levinsen. Annotationes Zoologicae Japonenses, 17: 577 , S., 1946. Studies on the development of Annelida Polychaeta I (with 17 plates and 33 textfigures). Journal of the Faculty of Science Hokkaido Imperial University Series VI, Zoology, 9: 115 , S. & M. Yamada, 1954. Polychaetous an-nelids from Matsushima Bay (with 10 text-figures). Journal of the Faculty of Science Hokkaido Imperial University Series VI, Zoology, 12: 175 , E. I., 1979. New records of five polychaetous Annelida species in Korea. Korean Journal of Fisheries and Aquatic Sciences, 12: 35 39. [in Korean with English abstract] 2006 11(2): 191 , K., 1934. Contribution to the study of Japanese Arenicola Part I. Notes on the habits and distribution of Arenicola in Japan. Science Reports of the Tokyo Bunrika Daigaku. Section B, 1: 271 280.