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On the morphology and life-history of Hemiurus luehei Odhner, 1905 (Digenea: Hemiuridae)
Køie, M. (1990). On the morphology and life-history of Hemiurus luehei Odhner, 1905 (Digenea: Hemiuridae). J. Helminthol. 64: 193-202. https://dx.doi.org/10.1017/S0022149X00012165
In: Journal of Helminthology. Cambridge University Press: London. ISSN 0022-149X; e-ISSN 1475-2697, more
Peer reviewed article  

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Keywords
    Herrings
    Invertebrates > Platyhelminthes > Trematoda > Digenea > Helminth larvae > Digenean larvae > Cercariae
    Invertebrates > Platyhelminthes > Trematoda > Digenea > Helminth larvae > Digenean larvae > Metacercariae
    Life history
    Morphology
    Copepoda [WoRMS]; Hemiurus luehei Odhner, 1905 [WoRMS]; Philine denticulata (J. Adams, 1800) [WoRMS]; Sagitta Quoy & Gaimard, 1827 [WoRMS]
    Marine/Coastal

Author  Top 
  • Køie, M.

Abstract
    Previously undescribed cystophorous cercariae, which develop in sporocyst germinal sacs in the tectibranch opisthobranch Philine denticulata, are shown to be cercariae of H. luehei, a common stomach parasite of clupeid and salmonid fishes off the Atlantic coast of Europe, in the Baltic and the Mediterranean Sea. In experimental infections, the free-swimming cercariae were seized by calanoid copepods. Temora longicornis and Acartia tonsa acted as suitable experimental intermediate hosts. Pressure by the copepod mouth appendages causes delivery tube eversion and the injection of the cercarcial body into the haemocoel. Sagitta sp. was found naturally infected with a metacercaria of H. luehei. The cystophorous cercaria and metacercaria are described using light and scanning electron microscopy. Adults from herring were examined under the stereoscan electron microscope.

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