An Oregonian Cryptomastix Mullani Blandi

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An Oregonian Cryptomastix mullani blandi Class Gastropoda — Order Stylommatophora — Family Polygyridae CONSERVATION STATUS DESIGNATIONS Rangewide: Critically imperiled subspecies (G3G4T1) Statewide: Unranked (SNR) ESA: No status USFS: Region 1: No status; Region 4: No status BLM: No status IDFG: Not classified BASIS FOR INCLUSION Idaho endemic; habitat threats. TAXONOMY Taxonomic relationships within Cryptomastix mullani are poorly understood. Pilsbry (1948) recognized 8 subspecies, 2 of which are now considered by most authors to be full species. Vagvolgyi (1968) did not recognize subspecies and considered most nominal species in the genus to be synonyms of C. mullani. Contrarily, Frest (1999) considered these species and subspecies to be valid. DISTRIBUTION AND ABUNDANCE This terrestrial snail is endemic to the lower Coeur d’Alene River valley of Idaho. Specimens collected in Montana by Pilsbry (1939) have been referred to the subspecies C. mullani mullani (Frest 1999). Recent efforts to relocate populations have been unsuccessful (Frest 1999). POPULATION TREND Frest (1999) considered populations of this subspecies to be declining in abundance at a number of occupied sites. Although the species was extant during 1990, no effort to locate the subspecies since then has been successful (Frest 1999). HABITAT AND ECOLOGY Frest (1999) reported habitat to comprise undisturbed mesic forest at low elevation in have a well-developed understory. ISSUES Habitat loss is a principal threat to the species, particularly as a result of surface disturbance, removal of surface debris or understory plants, reduction of canopy coverage, or changes in soil moisture. Frest (1999) specifically mentions timber harvest, mining, and livestock grazing as threats. RECOMMENDED ACTIONS Taxonomic study of this and related subspecies is of particular interest considering that the distinctiveness of nominal taxa and possible undescribed species is in question. Information is also needed regarding the distribution, abundance, and trends of the subspecies. Limiting surface disturbance at known sites is also of importance. An Oregonian Cryptomastix mullani blandi Ecological Section Point Locations 0 20 40 80 Kilometers 11 August 2005 Point data are from Idaho Conservation Data Center, Idaho Department of Fish and Game. 0 20 40 80 Miles.

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