Leeches Found on Two Species of Helisoma from Fleming's Creek, Michigan
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Date
1971-01
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Abstract
A survey of leeches in three genera of gastropods collected from Fleming's Creek, near Ypsilanti, Michigan, revealed a selective association between the smaller leech Helobdella papillata and the smaller snail, Helisoma anceps, and between the larger leech Helobdella lineata and the larger snail Helisoma trivolvis. In addition, a few individuals of the leech Glossiphonia complanata were found on both helisomid snails, and this species, together with nine other species of leeches, was also found either free-swimming or attached to substrate other than one of these snails.
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Author Institution: Biology Department, Eastern Michigan University, Ypsilanti, Michigan 48197
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The Ohio Journal of Science. v71 n1 (January, 1971), 15-20