Studies on the Helminth Fauna of Alaska. XXXVI. Parasites of the Wolverine, Gulo gulo L., with Observations on the Biology of Taenia twitchelli Schwartz, 1924

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Abstract
Seven species of helminths (viz., Alaria sp., Mesocestoides kirbyi Chandler, 1944, Taenia twitchelli Schwartz, 1924, Trichinella spiralis (Owen, 1835), Molineus patens (Dujardin, 1845), Ascaris devosi Sprent, 1952, and Physaloptera torquata Leidy, 1856) were collected from 80 wolverines autopsied in Alaska. Four species (Alaria sp., M. kirbyi, A. devosi, P. torquata) are recorded for the 1st time from this host and a 5th, Molineus patens, for the 1st time from the wolverine in North America. The life cycle of T. twitchelli Schwartz, 1924, a cestode apparently host specific for the wolverine, was completed experimentally, and the essential natural intermediate host is considered to be the porcupine, Erethizon dorsatum. Observations on host relationships and on the development and pathogenicity of the larval cestode are described. The original description of T. twitchelli has been supplemented and the taxonomic status of this species discussed.

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