Clithon retropictum

Clithon retropictum (, ) is a species of freshwater and brackish water snail with an operculum. It is an aquatic gastropod in the family Neritidae.

Distribution

This species occurs on the Japanese islands of Honshu, Kyushu, and Shikoku. It also occurs on the South Korean island of Jeju, and in Taiwan.

Description

Habitat

C. retropictus lives in brackish water and in freshwater.

Feeding habits

Clithon retropictum is an herbivorous species.

Life cycle

C. retropictum is oviparous. Juveniles hatch from eggs in September. The lifespan of C. retropictum is up to 12 years and it is one of the most long-lived freshwater gastropods.

Parasites

• Vibrio parahaemolyticus

Status

The species is considered as a second grade endangered species by the Korean ministry of environment.

References

Further reading

• HIRATA TETSU, UEDA HAJIME, TSUCHIYA YASUTAKA, SATO TOSHIHIKO & NISHIWAKI SABURO. 1999. Distribution of Clithon retropictus(Gastropoda; Neritidae) and environmental conditions in the rivers of Izu Peninsula. Bulletin of the Faculty of Education & Human Sciences, Yamanashi University, Volume 1, number 1, 24-30. (article in Japanese, English abstract)

External links

• https://web.archive.org/web/20070909103814/http://shell.kwansei.ac.jp/~shell/pic_book/data08/r000792.html photos of shells
• https://web.archive.org/web/20080907101015/http://www.gastropods.com/8/Shell_8638.html photos of shells