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ANIMAL INFORMATION: Please note, this part of mongabay has been updated |
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Acorn RamshornEducational resources on Acorn RamshornAcorn Ramshorn or Planorbella multivolvis is listed on the IUCN Red list (1996) as Extinct . IUCN Profile of the Acorn Ramshorn Planorbella multivolvis (Acorn ramshorn) - MNFI Rare Species Explorer Key Characteristics. The acorn ramshorn is a medium-sized freshwater snail with a discoidal (flat spiral) shell that is 0.6 in (14 mm) in diameter and 0.3 in (8 mm) in height with web4.msue.msu.edu/mnfi/explorer/species.cfm?id=12577 Michigan's Special Animals Michigan's Special Animals. This list presents the Endangered (E), Threatened (T), and Probably Extirpated (X) animal species of Michigan, which are protected under the Endangered web4.msue.msu.edu/mnfi/data/specialanimals.cfm www.uwsp.edu Acorn ramshorn water snail: Planorbella multivolvis: 2000: Michigan: Stevens Island Carib beetle: Mecodema punctellum: 1996: Stevens Island, New Zealand www.uwsp.edu/geo/faculty/heywood/geog358/endangr/extinctI/extinctIL.htm MICHIGAN ENDANGERED & THREATENED SPECIES LIST, March 1999 ...species of mollusks of class Gastropoda (snails) are included on the state list of endangered species : (a) Planorbella multivolvis (Case) [Helisoma multivolvis] Acorn ramshorn (b) forestry.msu.edu/testmsaf/PDF/TNEspecies.PDF Michigan's Special Animals Acorn ramshorn: Planorbidae: E: GX: SX: Summary; Planorbella smithi: An aquatic snail (no common name) Planorbidae: E: G5T2: S2: Summary; Anguispira kochi: Banded globe web4.msue.msu.edu/mnfi/data/specialanimals.cfm?c=2 Michigan's Special Animals SC: G5Q: SNR: Planorbella smithi: An aquatic snail (no common name) Planorbidae: E: G5T2: S2: Summary; Planorbella multivolvis: Acorn ramshorn: Planorbidae: E: GX: SX web4.msue.msu.edu/mnfi/data/specialanimals.cfm?c=3 Michigan's Special Animals Michigan's Special Animals. This list presents the Endangered (E), Threatened (T), and Probably Extirpated (X) animal species of Michigan, which are protected under the Endangered web4.canr.msu.edu/mnfi/data/specialanimals.cfm?c=1&s=2
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