Publications

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comparative observations on cercariae and metacercariae of echinostoma trivolvis and echinoparyphium sp.comparative observations were made on cercariae of echinoparyphium sp. from physa gyrina in charlie's pond, stokes county, north carolina and cercariae of echinostoma trivolvis from helisoma trivolvis in northampton county, pennsylvania. the cercaria of echinoparyphium sp. has 43 collar spines, lacks penetration and paraesophageal glands, and has a conical tail without fin folds. the cercaria of e. trivolvis has 37 collar spines, penetration and paraesophageal glands, a finger-like process at th ...19989645871
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