First Report of the Acanthocephalan Plagiorhynchus cylindraceus in the Terrestrial Isopod Porcellio scaber

摘要

Terrestrial isopod populations were examined from .5 different sites on the Penn State-Altoona campus in Altoona, Pennsylvania, U.S.A. Length and sex of each isopod were recorded before it was examined for acantho-cephalan parasites. Three isopod species were found: Armadillidium vulgare, Porcellio scaber, and Oniscus asellus. The acanthocephalan parasite Plagiorhynchus cylindraceus was found in P. scaber from a single site (site prevalence, 2.5%). This is the first report of natural infection of P. scaber by P. cylindraceus.