ISSN : 1225-3480
The neritid species Clithon retropictus inhabits rivers and estuaries along the southern coast of the Korean mainland but has not been previously reported from Jeju Island. In 2007 and 2011 specimens of this species were obtained from two separate localities on the south coast of the island. Comparisons were made with von Martens’ original description, specimens from the Korean mainland, and illustrations and descriptions in the literature. Although there were some differences in color and markings, and slight differences in morphology, the specimens from Jeju Island compare well with those from the mainland and in the literature. The shells of this species become more ovate and more eroded with age. In one locality, a small river, specimens of the pleurocerid Semisulcospira libertina (Gould, 1859), were found adjacent to, and coexisting with, a population of C. retropictus, an association that often occurs. The occurrence of Clithon retropictus represents a range extension to Jeju Island.
Ahn, K. K. 2002-2008. “Mike’s Seashells”. Available from WWW: <http://microseashell.com>
Davis, G. (1969) A Taxonomic Study of Some Species of Semisulcospira in Japan (Mesogastropoda: Pleuroceridae). Malacologia, 7(2-3): 211-294.
Eichhorst, T. “Clithon retropictus" pers. comm., unpublished manuscript, in press.
Environmental Bucket. 2001. Available from WWW:<http://www.01000.or.kr/xe/Wild_Photo/11889>
Furujo, Y. and Tomiyama, K. (2000) Distribution and Microhabitat of Coexisting Two Freshwater Snail Species, Semisulcospira libertina (Gould, Prosobranchia; Pleuroceridae) and Clithon retropictus (Martens, Prosobranchia: Neritidae). The Japanese Journal of Malacology. Venus, 59(3): 245-260 [in Japanese with English abstract].
Habe, T. (1975a) The Mollusks of Japan (Vol. I). Gakken Co. Ltd. Japan, Tokyo. 301 pp. [in Japanese].
Habe, T. (translated T. I. Elliott) (1975b) Shells of Japan (Hoikusha’s Color Book Series No. 25) (4th ed.). Hoikusha Publishing Company, Ltd. Japan, Osaka. 144 pp.
Haynes, A. (2005) An evaluation of members of the genera Clithon Montfort, 1810 and Neritina Lamarck, 1816 (Gastropoda: Neritidae). Molluscan Research, 25(2): 75-84. Available from WWW: <http://www.mapress.com.mr/>
Higo, S. and Goto, Y. (1993) A Systematic List of Molluscan Shells from the Japanese Is. and the Adjacent Area. Elle Corp. Japan, Osaka. 22 + 693 + 13 + 149 pp. (index). [in Japanese].
Hirase, S. (1951) A Handbook of Illustrated Shells in Natural Colors from the Japanese Islands and their Adjacent Territories (Isao Taki ed.). Bunkyokaku. Japan, Tokyo. 124 pp. [in Japanese]
Hirata, T., Ueda, H., Tsuchiya, Y., Sato, T., and Nishiwaki, S. (1999) Distribution of Clithon retropictus (Gastropoda; Neritidae) and environmental conditions in the rivers of Izu Peninsula. Bulletin of the Faculty of Education and Human Sciences, Yamanashi University, 1(1): 24 – 30. [in Japanese with English abstract]
Kira, T. (1964) Colored Illustrations of the Shells of Japan (Vol. I). Hoikusha Publishing Co., Ltd. Japan, Osaka. ix + 240 pp. [in Japanese]
Kobayashi, S. and Iwasaki, K. (2002) Distribution and Spatio-temporal Variation in the Population Structure of the Fluvial Neritid Gastropod Clithon retropictus. Benthos Research, 57(2): 91 – 101.
Kumazawa, N. H, Kato, E, Takaba, T, and Yokota, T. (1988) Survival of Vibrio parahaemolyticus in two gastropod molluscs, Clithon retropictus and Nerita albicilla. Nihon Juigaku Zasshi, 50(4): 918-24. [in Japanese with English abstract]
Kwon, O.G., Min, D.-K., Lee, J.-R., Lee, J.-S., Je, J.-G. and Choe, B.-L. (2001) Korean Mollusks with Color Illustrations. Hangul Graphics. Korea, Busan. 332 pp. [in Korean]
Kwon, O.K., Park, G.-M. and Lee, J.S. (1993) Colored Shells of Korea. Academy Publishing Co. Korea, Seoul. 445 pp. [in Korean]
Martens, E. von. (1863-1879) Die Gattung Neritina. Systematisches Conchylien-Cabinet von Martini und Chemnitz 2 (10). 303 pp., pls. A, 1-23. [in German]
Matsuoka, K., Kimura, T., Kimura, S., Yamaguchi, K., and Takayasu, K. (1999) Molluscan Fauna of the lower reaches of the Toyogawa River. Science Report of the Toyohashi Museum of Natural History, 9: 15 – 24. [in Japanese with English abstract]
Min, D.-K., Lee, J.-S., Koh, D.-B. and Je, J.-G. (2004) Mollusks in Korea. Min Molluscan Research Institute. Korea, Seoul. 566 pp [in Korean]
“Neritopsine Gastropods” (2010) Available from WWW:<http://neritopsine.lifedesks.org/taxa>
Noseworthy, R.G., Lim, N.R., and Choi, K.S. (2007) A Catalogue of the Mollusks of Jeju Island, South Korea. Korean Journal of Malacology, 23: 65-104.
Ohara, T. and Tomiyama, K. (2000) Niche Segregation of Coexisting Two Freshwater Snail Species, Semisulcospira libertina (Gould, Prosobranchia: Pleuroceridae) and Clithon retropictus (Martens, Prosobranchia: Neritidae). Japanese Journal of Malacology, 59(2): 135 – 147. [in Japanese with English abstract]
Okutani, T. (2000) Marine Mollusks in Japan. Tokai University Press. Japan, Tokyo. 1224 pp.
Pace, G. L. (1996) Andrews’ Anatomical Studies and Their Taxonomic Significance for the Snail Family Neritidae. In: Elliott, N. B., Edwards, D. C., and Godfrey, P. J. (eds.) Proceedings of the Sixth Symposium on the Natural History of the Bahamas. Bahamian Field Station, Ltd. Bahamas, San Salvador, pp. 126 – 133.
Shigemiya, Y. and Kato, M. (2001) Age distribution, growth, and lifetime copulation frequency of a freshwater snail, Clithon retropictus (Neritidae). Population Ecology, 43(2): 133 – 140.
Tan, S. T. and Clements, R. (2008) Taxonomy and Distribution of the Neritidae (Mollusca: Gastropoda) in Singapore. Zoological Studies, 47(4): 481-494.
