Aquatic Parasite Observatory

Dactylogyrus spp. (Diesing, 1850)

    • Species Name: Dactylogyrus spp. (Diesing, 1850)
    • Synonyms: None
    • Taxonomy: (Diesing, 1850) Animalia, Platyhelminthes, Trematoda, Dactylogyrida, Dactylogyridae, Dactylogyrus spp.
    • Description: "Body elongated; head organs well-defined. Haptor with one pair of conspicuous dorsal anchors associated with dorsal transverse bar; ventral anchors and bar vestigial; 14 marginal hooks of similar shape, but varying in size; extra pair of hooks sometimes visible with phase microscopy. Cirrus tubular, variable in shape (straight, curved, coiled, or whiplike); accessory piece variable. Vagina present, ventral, usually on right side of body. Vitellaria coextensive with intestine and extending laterally to body margin. On gills of freshwater fishes, primarily Cypriniformes" (Hoffman and Williams Jr., 1999).
    • Life Cycle: “The egg is released by a gravid adult and settles to the bottom of a pond where it develops until an immature adult emerges. Dactylogyrus attaches to the fish and makes its way to the gills” (Olson, 1974).
    • Sources: Hoffman, G.L. and Williams Jr., E.H. 1999. Parasites of North American Freshwater Fishes. Second Edition, p. 124.
    • Olson, O.W. 1974. Animal Parasites, Their Life Cycles and Ecology. Dover. New York.
    • APO Parasite Records: (by Life Cycle)

  • University of Colorado Boulder