Brooks, D. R.; Mayes, M. A.; Thorson, T. B. (1981). Systematic review of cestodes infecting freshwater stingrays (Chondrichthyes: Potamotrygonidae) including four new species from Venezuela. Proceedings of the Helminthological Society of Washington. 48(1), 43-64.

225579

Brooks, D. R.; Mayes, M. A.; Thorson, T. B.

1981

48(1), 43-64

Publication

Cestode parasites were collected in freshwater stingrays from localities in Colombia, Venezuela. Brazil, and Paraguay. Four new species are described from Venezuela. Potamotrygonocestus orinocoensis sp. n. from Potamotrygon reticulatus in the delta of the Orinoco River resembles P. magdalenensis by having compact rather than follicular vitellaria, but differs by having larger and differently shaped bothridial hooks. Acanthobothrium regoi sp. n. from P. hystrix in the delta of the Orinoco River most closely resembles A. quinonesi, but differs by having larger bothridial hooks. Rhinebothroides glandularis sp. n. from Potamotrygon hystrix in the delta of the Orinoco River most closely resembles R. scorzai by having a coiled vagina and poral ovarian lobes which extend anterior to the posterior margin of the cirrus sac, but differs in numbers of bothridialloculi and testes, and by exhibiting prominent parenchymal gland cells surrounding the terminal male genitalia. Rhinebothroides venezuelensis sp. n. from Potamotrygon hystrix in the delta of the Orinoco River and P. yepezi from the Río Cachirí, Zulia, Venezuela, resembles R. moralarai and R. circularisi by having a straight vagina and poral ovarian lobes not extending anteriorly beyond the posterior margin of the cirrus sac, but differs in testes number and number of bothridial loculi.

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