The Life-Cycle of Diplostomum baeri eucaliae n. subsp. (Trematoda: Strigeida)

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Abstract
D. b. eucaliae is described from experimentally infected chicks and the screech owl, Otus asio, and from naturally infected mallard ducks, Anas p platyrhynchos. Developmental stages, including the cercaria, are described from the snails, Stagnicola palustris and S. palustris elodes. The brook stickleback, Eucalia inconstans, but not Pimephales p. promelas or Fundulus diaphanus menona, was experimentally infected. Exposure of the stickleback to more than 200 cercariae was usually fatal. The development of the Diplostomulum in the brain of the fish is described and the metacercaria is differentiated from known spp. A key to the known Diplostomulum spp. is presented. The calcareous corpuscles were positive for Ca, negative for carbo-hydrates and fats. They stained positively with urate stains, but we are not absolutely sure that urate is present.
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