A redescription of Nosema herpobdellae (Microspora: Nosematidae), a parasite of the leech Erpobdella octoculata (Hirudinea: Erpobdellidae) |
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Authors: | Stuart M. Spelling Johnstone O. Young |
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Affiliation: | Department of Zoology, University of Liverpool, Brownlow Street, P. O. Box 147, Liverpool L69 3BX, England |
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Abstract: | Nosema herpobdellae was recorded in populations of the leech Erpobdella octoculata from lakes in northwest England and North Wales and is redescribed using light and transmission electron microscopy. It differes from N. glossiphoniae in the nature of the infection and tissues parasitized and from N. tractabile in its larger spore size, longer polar filament, in the angle of the anterior coils of the polar filament to the spore long axis, and apparently in its developmental cycle. The infection was found in a massive xenoma, in the connective tissue surrounding the gut, which was presumed to be formed from a single hypertrophied cell. Its developmental cycle included merogony and sporogony. |
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Keywords: | Nosema herpobdellae Erpobdella octoculata Xenoma |
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