Aquatic Parasite Observatory

Cephalogonimus sp.

    • Species Name: Cephalogonimus sp.
    • Synonyms: Prosthogonimus (Pande 1932)
    • Taxonomy: Animalia, Platyhelminthes, Trematoda, Plagiorchiida, Cephalogonimidae, Cephalogonimus sp.
    • Description: Body elongate-oval, usually medium-sized (5mm long or less); extremities usually rounded. Tegument armed; spines more numerous anteriorly than posteriorly. Circumoral spines absent. Oral sucker equal to or slightly larger or smaller than ventral sucker. Ventral sucker in anterior half of body… Intestinal bifurcation far anterior to ventral sucker… Ovary entire, rounded or oval, submedian and usually obliquely anterior to anterior testis, posterolateral or occasionally almost lateral to ventral sicker... Excretory vesicle Y-shaped with additional lateral branches (rarely reported as vesicular); pore terminal or subterminal” (Bray et al., 2008).
    • Life Cycle: "The lifecycle of some species of Cephalogonimus have been experimentally determined to infect Helisoma snails as a first intermediate host, amphibians as a secondary host, and amphibians as the definitive host through consumption of secondary host" (Lang, 1968; Dronen and Lang, 1974).
    • Sources: Bray, R.A., Gibson D.I., and Jones, A. 2008. Keys to the Trematoda, Volume 3. p. 335.
    • Lang, B.Z. 1968. The Life Cycle of Cephalogonimus americanus Stafford, 1902 (Trematoda: Cephalogonimidae). The Journal of Parasitology, Vol. 54, No. 5, pp. 945-949. http://www.jstor.org/stable/3277126 Accessed: 20-01-2016 00:03 UTC.

      Dronen Jr., N.O. and Lang, B.Z. 1974. The Life Cycle of Cephalogonimus salamandrus sp. n. (Digenea: Cephalogonimidae) from Ambystoma tigrinum (Green) from Eastern Washington. The Journal of Parasitology, Vol. 60, No. 1, p. 75-79. http://www.jstor.org/stable/3278681 Accessed: 20-01-2016 00:03 UTC Published by Allen Press on behalf of American Society of Parasitologists.

    • APO Parasite Records: (by Life Cycle)
      1. Host SpeciesHost Common NameSite(s) of Infection
        Rana catesbeianaAmerican bullfrogSkin, connective tissue

Parasite Images:


  • University of Colorado Boulder