| 词条 | Cerion nanus |
| 释义 |
| name = Cerion nanus | image = | status = CR | status_system = IUCN2.3 | status_ref = [1] | regnum = Animalia | phylum = Mollusca | classis = Gastropoda || unranked_superfamilia = clade Heterobranchia clade Euthyneura clade Eupulmonata clade Stylommatophora informal group Sigmurethra | superfamilia = Urocoptoidea | familia = Cerionidae | genus = Cerion | species = C. nanus | binomial = Cerion nanus | binomial_authority = Maynard, 1889[2] | synonyms = }} Cerion nanus is a species of medium-sized air-breathing land snail, a terrestrial pulmonate gastropod in the family Cerionidae. Distribution and EcologyThis species is endemic to the island of Little Cayman, Cayman Islands in the Caribbean Sea[3], where it is found among Evolvulus arbuscula and E. squamosum[4], which grow in this coastal dry limestone shrub. Shells were found in 1975 at three sites, in an area of 35,000 m2 surrounding the North Shore Track. It is sympatric throughout its range with Cerion pannosum, a species with a much larger distribution and size, which has probably ecologically replaced C. nanus. However, this replacement has not yet occurred, suggesting that this species may have never had a larger population. Currently several small populations exist along the Spot Bay Road in populations far larger than originally suspected.[5] References1. ^Hounsome M. (1996). Cerion nanus. 2006 IUCN Red List of Threatened Species. {{webarchive|url=https://web.archive.org/web/20140627000000/http://www.iucnredlist.org/ |date=June 27, 2014 }} Downloaded on 6 August 2007. 2. ^{{cite web| url=http://www.americanscientist.org/issues/id.13866,y.0,no.,content.true,page.1,css.print/issue.aspx| title=The Rarest Snail in the World| publisher= American Scientist| accessdate=14 May 2014}} 3. ^{{Cite web|url=https://www.iucnredlist.org/en|title=The IUCN Red List of Threatened Species|website=IUCN Red List of Threatened Species|access-date=2019-02-04}} 4. ^{{Cite web|url=https://www.americanscientist.org/article/the-rarest-snail-in-the-world|title=The Rarest Snail in the World|date=2017-02-06|website=American Scientist|language=en|access-date=2019-02-04}} 5. ^{{Cite journal|last=Hounsome|last2=Askew|date=1980|title=CERION NANUS (MAYNARD) (MOLLUSCA : CERIONIDAE ) ON LITTLE CAYMAN|url=https://repository.si.edu/bitstream/handle/10088/4795/00241.09.pdf?sequence=1&isAllowed=y|journal=Atoll Research Bulletin|volume=241|pages=91-96|via=Smithsonian National Museum of Natural History}} Further reading
4 : Cerionidae|Fauna of the Cayman Islands|Gastropods described in 1889|Taxonomy articles created by Polbot |
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