Land mollusk surveys on USFS Northern Region lands /

Abstract

Fred Samson (USFS) recognized the need to address invertebrates in the Forest planning process, appreciating the extremely limited information available for management decisionmaking, and promoted the project through the USFS Regional Inventory and Monitoring (RIM) program. Henning Stabins (Plum Creek Timber Company) and the Amphibian Inventory Project provided us with additional records of SOC mollusk species that helped fill significant gaps in distributions. Bill Bosworth, zoologist with the Idaho Conservation Data Center, provided the Montana Natural Heritage Program (MTNHP) with location data on SOC species tracked in the Idaho portions of the Northern Region; the Idaho records were especially critical for the production of new distribution maps, and fleshing out distributions of rare land mollusk species that occur on both sides of the Idaho-Montana border. Bill Leonard (Olympia, WA) and Tim Pearce (Carnegie Museum of Natural History) verified our tentative SOC and SOI slug identifications. Matthew Gates assisted with field surveys. Coburn Currier (MTNHP) assisted on some surveys and formatted and printed this report. We thank them all.

First Record of the Land Snail <i>Pristiloma idahoense</i> (Gastropoda: Pristilomatidae) for Montana

“…Recent surveys by the Idaho Department of Fish and Game (M. Lucid, personal communication) show that the species is widely distributed, although relatively rare, across the northern Idaho Panhandle and also extant in extreme northeastern Washington. Extensive surveys for land molluscs in Montana west of the continental divide began in 2005 and resulted in detections of a number of rare taxa of the Washingtonian Province with ranges primarily in Idaho (Frest and Johannes 2000;Hendricks et al 2007;Hendricks 2012;Burke 2013). However, P. idahoense was not one of the species found during the Montana surveys, nor has it been recorded previously in the state.…”