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Mollusks : Carnegie Museum of Natural History Home Pennsylvania Species Virginia Species Land Snail Ecology Resources Contact Virginia Land Snails Anguispira mordax (Shuttleworth, 1852) Family: Discidae Common name: Appalachian Tigersnail or Appalachian Disc Identification Width: 16 – 18 mm Height: 6 mm Whorls: 5.5 The shell of this species is somewhat flat but still has a notable a curve in the apex. The carina is well defined but not particularly sharp. The lip on the A. mordax is thin. The shell is yellow with interrupted red streaks that run in bands parallel to the radial ribs. These ribs are big and wide, sometimes up to 1 mm apart, giving the shell texture a wavy look. Ecology Anguispira mordax is found in a wide range of habitats similar to A. alternata (Hubricht, 1985). Kutchka (1940) Photo(s): Anguispira mordax by Bill reports this animal on basswood and tuliptree logs. Frank ©. Views of its shell by Jochen Gerber ©. Taxonomy There’s some uncertainty about the taxonomy of this animal (Pilsbry, 1946-8). Hubricht (1985) says A. mordax is only pure in North Carolina, and elsewhere hybridizes with other species in the same genus. Click photo(s) to enlarge. Synonyms for A. mordax are: Anguispira alternata mordax, A. a. lawae, A. a. paucicostata, A. a. smithi, A. cumberlandiana Columba, A. smithi, A Columba, A. paucicostata, A. mordax paucicostata, Helix mordax, and Pyramidula alternata mordax. It hybridizes with A. alternata and A. strongylodes. Distribution This species has been found in Alabama, Kentucky, North Carolina, Tennessee, Virginia, and West Virginia. It is found in north-western Virginia and along the border with West Virginia. NatureServe Global Rank: G4 NatureServe State Rank: S3S4 Greg Kimber, Ken Hotopp 7/2012 Range Map .
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