Aquatic Parasite Observatory

Alaria spp. (Schrank, 1788)

    • Species Name: Alaria spp. (Schrank, 1788)
    • Synonyms: None
    • Taxonomy: (Schrank, 1788) Animalia, Platyhelminthes, Trematoda, Strigeidida, Diplostomatidae, Alaria spp.
    • Life Cycle: Coming Soon.
    • Description:
      1. Body indistinctly bipartite; forebody linguiform, concave; hindbody cylindrical, usually shorter than forebody. Pseudosuckers present, forming ear-like projections. Oral and ventral suckers rather small; pharynx relatively large. Holdfast organ round to elongate, variable in length; anterior margin may reach pharynx. Testes of different size and form, multi- or bilobed, tandem; anterior asymmetrical, opposite ootype; posterior symmetrical, larger. Ovary oval, median, pretesticular, at junction of fore- and hindbody. Vitellarium mainly in forebody, may penetrate holdfast organ and extend into hindbody. Seminal vesicle with either ejactulatory pouch or ejactulatory duct with muscular region. Copulatory bursa small, with subterminal dorsal pore. Hermaphroditic duct opens at tip of small papilla.
    • Sources: Bray, R.A., Gibson D.I., and Jones, A. 2002. Keys to the Trematoda, Vol. 1, p. 184.
    • APO Parasite Records: (by Life Cycle)

Parasite Images:

Distribution Map:

  • University of Colorado Boulder