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Post by sebbe67 on Oct 23, 2005 17:59:59 GMT
Fluminicola minutissimus
extinct Idaho freshwater snail
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Post by another specialist on Oct 28, 2005 10:21:20 GMT
Smithsonian Contributions to Zoology SCZ-583 A Review of the North American Freshwater Snail Genus Fluminicola (Hydrobiidae) Robert Hershler and Terrence J. Frest 41 pages, 18 figures Issue Date: July 24, 1996 Original publication available Abstract: Species currently allocated to the northwestern North American genus Fluminicola Carpenter, 1864, comprise a morphologically diverse group that is shown to be paraphyletic based on a cladistic analysis of nominal species utilizing European Lithoglyphus Hartmann, 1821, and two eastern North American genera as outgroups. Fluminicola consists of a single, highly divergent species (F. virens) and a clade comprising all other congeners, which is defined by synapomorphic conditions of pedal ganglia and penis. Groups of species within the clade are united by derived modifications of shell protoconch microsculpture, operculum, central and lateral radular teeth, ctenidium, hypobranchial gland, penis, ovary, and female capsule gland. A redefinition of Fluminicola in the wake of the above analysis cannot be provided until anatomical details of the type species (which may be extinct) are obtained. Nine Recent species currently are assigned to this group. These are Fluminicola coloradensis, distributed in the Green River basin; F. dalli, Pyramid Lake basin; F. fuscus, Snake-Columbia River basin; F. minutissimus, Snake River basin; F. modoci, Goose Lake basin; F. nuttallianus, Willamette River basin; F. seminalis, Sacramento and Pit river basins; F. turbiniformis, northwestern Great Basin; and F. virens, Willamette and lower Columbia river basins. Amnicola hindsi Baird, 1863, Fluminicola nuttalliana columbiana Keep, 1887, and Fluminicola columbiana Pilsbry, 1899a, are junior synonyms of F. fuscus (Haldeman, 1841); Lithoglyphus cumingii Frauenfeld, 1863a, is a junior synonym of F. seminalis (Hinds, 1842); and Paludina nuclea Lea, 1838, is a junior synonym of F. virens (Lea, 1838). The genus-group taxon Heathilla Hannibal, 1912, is a synonym of Fluminicola. 64.233.161.104/search?q=cache:lBpDdnNn_ngJ:www.sipress.si.edu/contributions_series/titles_series/scz_0583.html+Fluminicola+minutissimus&hl=entinyurl.com/dasvv |
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Post by another specialist on Nov 14, 2005 10:36:40 GMT
Rounded Global Status: GH - Possibly Extinct Reasons: Known from a single site in the Weiser River valley in Idaho; not found recently despite searches; may be extinct (Hershler and Frest 1996). Agricultural usage (grazing, diversion of springs for livestock or domestic usage) are the major threats. www.natureserve.org/ |
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Post by Sebbe on Jan 5, 2019 12:23:38 GMT
Hershler, R. and H.-P. Liu. 2017. Annotated checklist of freshwater truncatelloidean gastropods
of the western United States, with an illustrated key to the genera. Technical Note 449.repository.si.edu/handle/10088/35012
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