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Life cycle, cytology, and morphology of Polypodium hydriforme, a coelenterate parasite of the eggs of acipenseriform fishes.
  • E. Raikova
  • Biology, Medicine
  • The Journal of parasitology
  • 1 February 1994
Polypodium hydriforme is the only coelenterate adapted to intracellular parasitism in oocytes of acipenserid and polyodontid fishes. It occurs in both the Old and the New worlds, being parasitic inExpand
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Evolution of the nucleolar apparatus during oogenesis in Acipenseridae.
  • E. Raikova
  • Biology, Medicine
  • Journal of embryology and experimental morphology
  • 1 June 1976
Evolution of the nucleoli has been followed during oogenesis in the Acipenserid fishes, Acipenser ruthenus (the sterlet) and A. guidenstadti (the sturgeon) using light and electron microscopes. InExpand
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Phylogenetic placement of the enigmatic parasite, Polypodium hydriforme, within the Phylum Cnidaria
BackgroundPolypodium hydriforme is a parasite with an unusual life cycle and peculiar morphology, both of which have made its systematic position uncertain. Polypodium has traditionally beenExpand
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Amplified ribosomal DNA in meiotic prophase oocyte nuclei of acipenserid fishes
SummaryIn situ hybridization has been performed in sections through ovaries ofAcipenser ruthenus andAcipenser güldenstädti in order to detect the rDNA sequences. Hybridization resulted in specificExpand
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Cytomorphological peculiarities of Polypodium hydriforme (Cnidaria)
Cytomorphological characters of Polypodium hydriforme —a unique cnidarian, adapted to intracellular parasitism inside oocytes of Acipenseriform fish—are reviewed and analysed. Polypodium 's uniqueExpand
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Polypodium sp. (Coelenterata) found in North American sturgeon.
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Disordered Eating Attitudes and Behaviors: Gender Differences in Adolescenceand Young Adulthood
Introduction: Dieting, obsessive weight control practices, fears of fatness, negative body image, food and weight preoccupation and other distorted attitudes and behaviors are proven risk factorsExpand
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Morphology, ultrastructure, and development of the parasitic larva and its surrounding trophamnion of Polypodium hydriforme Ussov (Coelenterata)
  • E. Raikova
  • Biology, Medicine
  • Cell and Tissue Research
  • 2004
SummaryThe larval stage of Polypodium hydriforme is planuliform and parasitic inside the growing oocytes of acipenserid fishes. The larva has inverted germ layers and a special envelope, theExpand
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Fine structure of the nematocytes of Polypodium hydriforme Ussov (Cnidaria)
The fine structure of the stinging cells (nematocytes) and stinging capsules (nematocysts) is described for Polypodium hydriforme. a freshwater coclenterate with a prominent endoparasitie stage inExpand
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