and pervasive threat to southern populations. In summary, it appears that the populations in North Carolina, Virginia, and Maryland are declining as evidenced by low densities, lack of reproduction, or inability to relocate any dwarf wedgemussels in follow-up surveys. Populations in New Hampshire, Massachusetts, and Connecticut appear to be stable, while the status of populations in the Delaware River watershed affected by the recent floods of 2005 is uncertain at this time. References Footnotes Bibliography Dwarf Wedgemussel Recovery Plan: US Fish and Wildlife Service (PDF document) NatureServe Explorer report Dwarf Wedgemussel Fact Sheet Andrew Moser, G. and the Fish and Wildlife Service. 14 March 1990. Endangered and Threatened Wildlife and Plants; Determination of Endangered Status for the Dwarf Wedge Mussel. Federal Register, 55(50):9447-9451. Cole, J. C., B. S. White and C. Apse. 2004. A quantitative assessment of freshwater mussels (Bivalvia:Unionidae) in the Neversink River prior to the Cuddebackville Dam removal. Report to The Nature Conservancy, Cuddebackville, New York. 16 pp. Cole, J. and B. S. White. 2006. An assessment of freshwater mussels in the Neversink River following removal of the dam at Cuddebackville, NY and a severe spring flood event. Report to The Nature Conservancy, Cuddebackville, NY. 12 pp. Fichtel, C. and D. G. Smith. 1995. The Freshwater Mussels of Vermont. Nongame and Natural Heritage Program, Vermont Fish and Wildlife Department. Technical Report 18. 53 pp. Gabriel, M. 1995. Freshwater mussel distribution in the rivers and streams of Cheshire, Hillsborough, Merrimack and Rockingham, Counties, New Hampshire. Report submitted to U.S. Fish and Wildlife Service, New England Field Office and New Hampshire Fish and Game Department. 60 pp. Gabriel, M. 1996. 1996 Monitoring of the dwarf wedgemussel (Alasmidonta heterodon) in the Ashuelot and Connecticut Rivers, New Hampshire. Report submitted to The Nature Conservancy, Eastern Regional Office, Boston, Massachusetts. 27 pp. Hanson, M. J. 1998. March 24. Re: status of dwarf wedgemussel [personal email]. Accessed March 24, 1998. McLain, D. and M. R. Ross. 2005. Reproduction based on local patch size of Alasmidonta heterodon and dispersal by its darter host in the Mill River, Massachusetts, USA. Jour. N. Am. Benthol. Soc., 24(1):139-147. Michaelson, D. L. and R. J. Neves. 1995. Life History and habitat of the endangered dwarf wedgemussel Alasmidonta heterodon (Bivalvia:Unionidae). Jour. N. Am. Benthol. Soc. 14:324-340. Nedeau, E. J. 2004a. A Fourth Investigation of the Survival of Dwarf Wedgemussels (Alasmidonta heterodon) for the Relocation Project on the Connecticut River, Route