A new lumbriculid worm, Rhynchelmis aleutensis, is described from streams on Adak Island, Alaska. The new species does not resemble other Alaskan or Siberian Rhynchelmis species. The paired spermathecal diverticula and the morphology of the male pores and atria suggest that it is more closely related to a species group known only from the western United States, south of Canada. The latter group has been associated with Sutroa Eisen, 1888. Copyright ?? 2005 Magnolia Press.
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Rhynchelmis aleutensis n. sp. (Clitellata: Lumbriculidae) from Adak Island, Alaska