Paravitellotrema overstreeti Sp. n. (Digenea: Hemiuridae) from the Colombian Freshwater Stingray Potamotrygon magdalenae Dumeri

Authors

Daniel R. Brooks, University of Notre DameFollow
Monte A. Mayers, University of Pennsylvania School of Veterinary Medicine
Thomas B. Thorson, University of Nebraska-Lincoln

Date of this Version

1979

Citation

Proceedings of the Helminthological Society of Washington, v. 46, no.1 (1979)

Comments

Used by permission

Abstract

Paravitellotrema overstreeti from the freshwater stingray Potamotrygon magdalenae in northern Colombia most closely resembles P. thorsoni by possessing a muscular sinus organ and sinus sac as well as exhibiting a saccate rather than elongate prostatic vesicle, It differs by possessing lobate rather than spherical vitellaria, a smaller sinus organ and sinus sac, elongate rather than diamond-shaped prostatic cells enclosed in a delicate membrane rather than free in the parenchyma, and a metraterm joining the hermaphroditic duct immediately anterior to the prostatic vesicle rather than at the base of the sinus organ,