Clithon retropictum

This species occurs on the Japanese islands of Honshu, Kyushu, and Shikoku.{{in lang|ja}} [http://www.jpnrdb.com/search.php?mode=map&q=110504010020069 イシマキガイ Clithon retropictus] {{Webarchive|url=https://web.archive.org/web/20111004064233/http://www.jpnrdb.com/search.php?mode=map&q=110504010020069 |date=2011-10-04 }}. accessed 6 January 2011. It also occurs on the South Korean island of Jeju, and in {{cite web| url=https://species.nibr.go.kr/endangeredspecies/rehome/redlist/redlist_view.jsp?link_gbn=ex_search&rlcls_sno=54&1=1&page_count=57|title=한국의 멸종위기종 기수갈고둥}} Taiwan.

File:Clithon retropictus 001.jpg

C. retropictus lives in brackish water and in freshwater.

Clithon retropictum is an herbivorous species.{{in lang|ja}} Ohara T. & Tomiiyama K. (2000). "Niche segregation of coexisting two freshwater snail species, Semisulcospira libertina (Gould) (Prosobranchia: Pleuroceridae) and Clithon retropictus (Martens) (Prosobranchia: Neritidae)". Venus 59(2): 135–147. [http://ci.nii.ac.jp/naid/110004773531/en CiNii].

C. retropictum is oviparous.FURUJO Yuki & TOMIYAMA Kiyonori. [http://ci.nii.ac.jp/naid/110004773541/ 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, Vol. 59, No. 3(20000930), pp. 245-260. 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.{{Cite journal | last1 = Shigemiya | first1 = Y. | last2 = Kato | first2 = M. | doi = 10.1007/PL00012024 | title = Age distribution, growth, and lifetime copulation frequency of a freshwater snail, Clithon retropictus (Neritidae) | journal = Population Ecology | volume = 43 | issue = 2 | pages = 133 | year = 2001 }}

• Vibrio parahaemolyticus{{Cite journal

| last1 = Kumazawa | first1 = N. H.

| last2 = Kato | first2 = E.

| last3 = Takaba | first3 = T.

| last4 = Yokota | first4 = T.

| title = Survival of Vibrio parahaemolyticus in two gastropod molluscs, Clithon retropictus and Nerita albicilla

| journal = Nihon Juigaku Zasshi. The Japanese Journal of Veterinary Science

| volume = 50

| issue = 4

| pages = 918–924

| year = 1988

| pmid = 3172602 | doi=10.1292/jvms1939.50.918

| doi-access = free

}}

The species is considered as a second grade endangered species by the Korean ministry of environment.{{cite journal | url=https://link.springer.com/article/10.1007/s12601-013-0023-2 | doi=10.1007/s12601-013-0023-2 | title=The occurrence of Clithon retropictus (v. Martens, 1879) (Gastropoda: Neritidae) in an unusual habitat, northern Jeju Island, Republic of Korea | date=2013 | last1=Noseworthy | first1=Ronald G. | last2=Lee | first2=Hee-Jung | last3=Choi | first3=Kwang-Sik | journal=Ocean Science Journal | volume=48 | issue=3 | pages=259–262 | bibcode=2013OSJ....48..259N | url-access=subscription }}

{{Reflist}}

• HIRATA TETSU, UEDA HAJIME, TSUCHIYA YASUTAKA, SATO TOSHIHIKO & NISHIWAKI SABURO. 1999. [https://web.archive.org/web/20071010030055/http://sciencelinks.jp/j-east/article/200021/000020002100A0302405.php 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)

{{Commons category|Clithon retropictum}}

• 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

{{Taxonbar|from=Q5134445}}

Category:Neritidae

Category:Gastropods described in 1879

Category:Endangered species

{{Neritidae-stub}}