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The Partial Life Cycle and Affinities of an Unusual Xiphidiocercaria from Amnicola limosa (Say) in Indiana, U.S.A. (Digenia: Lecithodendriidae)

Raymond M. Cable
The Journal of Parasitology
Vol. 71, No. 3 (Jun., 1985), pp. 342-344
DOI: 10.2307/3282016
Stable URL: http://www.jstor.org/stable/3282016
Page Count: 3
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Partial Life Cycle and Affinities of an Unusual Xiphidiocercaria from Amnicola limosa (Say) in Indiana, U.S.A. (Digenia: Lecithodendriidae)
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Abstract

Morphology and host relationships of the cercaria and metacercaria were described. Affinity with the Lecithodendriidae was indicated although the cercaria differs from virgulate larvae characteristic of that family in being monostomate and lacking a virgula in the oral sucker. Those differences may be related to the unusual manner in which the second intermediate host, an anopheline mosquito larva, became infected. Instead of penetrating the exoskeleton, the cercariae attached to the surface film by the tips of their tails and were eaten by the larva when it fed. Metacercariae settled near the brain, encysted after the larva pupated, and persisted in the head of the adult mosquito. There was no mortality or evident impairment of the host at any stage.

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