Biology:Acorn ramshorn
| Acorn ramshorn | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia
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| Phylum: | |
| Class: | |
| (unranked): | |
| Superfamily: | |
| Family: | |
| Genus: | Planorbella
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| Species: | † P. multivolvis
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| Binomial name | |
| Planorbella multivolvis (Case, 1847)
| |
The acorn ramshorn, scientific name Planorbella multivolvis, was a species of small freshwater air-breathing snail, a pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.
This species was endemic to the state of Michigan in the United States .[2] It is was last documented in 1907 and is now considered to be extinct.[3][4]
The species was described to science in 1847 by William Case, who used the specific epithet "multivolvis" because the shells of this snail have a greater number of whorls than other members of the genus.[5] The known range of the species was Howe Lake, in Marquette County, Michigan.[2][3] It is thought that the species lived in the deeper waters of the lake, and came to shallow water only for the purposes of spawning.[2] A possible cause of population decline is the introduction of sport fish to Howe Lake, which began in 1905, two years prior to the last known sighting of the species.[3][6] A survey was conducted in 1989 and failed to locate any individuals.[6]
References
- ↑ Bogan A. E. (2000). Planorbella multivolvis. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.
- ↑ 2.0 2.1 2.2 Walker, Bryant (1907). "Notes on Planorbis". The Nautilus 21: 61–67. https://www.biodiversitylibrary.org/page/3666015#page/91/mode/1up.
- ↑ 3.0 3.1 3.2 "Planorbella multivolvis (Acorn ramshorn) - Michigan Natural Features Inventory". https://mnfi.anr.msu.edu/species/description/12577/Planorbella-multivolvis.
- ↑ Bogan, A. E. (2000-06-30). "IUCN Red List of Threatened Species: Planorbella multivolvis". https://www.iucnredlist.org/en.
- ↑ Case, William (1847). "Description of two new species of shells". The American Journal of Science and Arts. 2nd Series 3: 101. https://www.biodiversitylibrary.org/page/27965089#page/109/mode/1up.
- ↑ 6.0 6.1 "NatureServe Explorer 2.0". https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.114387/Planorbella_multivolvis.
Wikidata ☰ Q3076421 entry
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