Systematic Parasitology

, Volume 58, Issue 3, pp 159–174 | Cite as

A new species of Rhinebothroides Mayes, Brooks & Thorson, 1981 (Cestoda: Tetraphyllidea) from the Ocellate River Stingray in Argentina, with Amended Descriptions of Two other Species of the Genus

  • Verónica A. Ivanov


A new species of the tetraphyllidean genus Rhinebothroides Mayes, Brooks & Thorson, 1981 is described from the spiral intestine of specimens of the ocellate river stingray Potamotrygon motoro (Müller & Henle) collected in the Río Colastiné, Argentina. R. campbelli n. sp. can be distinguished from its congeners particularly in worm size (up to 7mm long), the number of segments (5-7), the number of testes per segment (26-41), the extension of the ovarian lobes and the absence of darkly-staining cells surrounding the distal end of the cirrus-sac. Comparison of tapeworms matching the original description of R. mclennanae Brooks & Amato, 1992 with the type-specimens of R. glandularis Brooks, Mayes & Thorson, 1981 showed that these are two distinct species. Consequently, R. mclenannae is considered a valid species rather than a synonym of R. glandularis, as suggested by Marques & Brooks (2003). R. mclennanae can be distinguished from R. glandularis by the morphology of the ovary, the number of medial loculi in the bothridia, the number of testes per mature segment and cirrus-sac size. It is concluded that variation in microthrix form and density may prove to be of taxonomic utility for distinguishing species of Rhinebothroides. Some comments on characters noted by Marques & Brooks (2003) in their revision of the genus are also provided, such as the absence of an external seminal vesicle in R. mclennanae and R. glandularis, the absence of microtriches in the genital atrium, intraspecific variation of bothridial shape and ovarian shape.


Seminal Vesicle Original Description Intraspecific Variation Distinct Species Medial Loculus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 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, 48,43-64.Google Scholar
  2. Brooks, D.R. & Amato, J.F.R. (1992) Cestode parasites in Potamotrygon motoro(Natterer) (Chondrichthyes: Potamotrygonidae) from southwestern Brazil, including Rhinebothroides mclennanaen. sp. (Tetraphyllidea: Phyllobothriidae), and a revised host-parasite checklist for helminths inhabiting Neotropical freshwater stingrays. Journal of Parasitology, 78, 393-398.PubMedGoogle Scholar
  3. Caira, J.N. & Tracy, R. (2002) Two new species of Yorkeria(Tetraphyllidea: Onchobothriidae) from Chiloscyllium punctatum(Elasmobranchii: Hemiscyliidae) in Thailand. Journal of Parasitology, 88, 1172-1180.PubMedGoogle Scholar
  4. Ghoshroy, S. & Caira, J.N. (2001) Four new species of Acanthobothrium(Cestoda: Tetraphyllidea) from the whiptail stingray Dasyatis brevisin the Gulf of California, Mexico. Journal of Parasitology, 87,354-372.PubMedGoogle Scholar
  5. Ivanov, V.A. & Campbell, R.A. (1998) A new species of Acanthobothriumvan Beneden, 1849 (Cestoda: Tetraphyllidea) from Rioraja castelnaui(Chondrichthyes: Rajoidei) in coastal waters of Argentina. Systematic Parasitology, 40,203-212.Google Scholar
  6. Ivanov, V.A. & Campbell, R.A. (2002) Notomegarhynchus navonaen. gen. and n. sp. (Eucestoda: Tetraphyllidea), from skates (Rajidae: Arhynchobatinae) in the Southern Hemisphere. Journal of Parasitology, 88,340-349.PubMedGoogle Scholar
  7. Marques, F.P.L. (2000) Evolution of neotropical freshwater stingrays and their parasites: taking into account space and time. PhD Thesis: University of Toronto, Canada, 325 pp.Google Scholar
  8. Marques, F.P.L. & Brooks, D.R. (2003) Taxonomic revision of Rhinebothroides(Eucestoda: Tetraphyllidea: Phyllobothriidae), parasites of Neotropical freshwater stingrays (Rajiformes: Myliobatoidei: Potamotrygonidae). Journal of Parasitology, 89, 994-1017.PubMedGoogle Scholar
  9. Nasin, C.S., Caira, J.N. & Euzet, L. (1997) Analysis of Calliobothrium(Tetraphyllidea: Onchobothriidae) with descriptions of three new species and erection of a new genus. Journal of Parasitology, 83,714-733.PubMedGoogle Scholar
  10. Zamparo, D., McLennan, D.A. & Brooks, D.R. (1999a) Macroevolutionary patterns of male reproductive investment in a clade of parasitic hermaphrodites. Journal of Parasitology, 85,540-544.PubMedGoogle Scholar
  11. Zamparo, D., Brooks, D.R. & Barriga, R. (1999b) Pararhinebothroides hobergin. gen. n. sp. (Eucestoda: Tetraphyllidea) in Urobatis tumbesensis(Chondrichthyes: Myliobatiformes) from coastal Ecuador. Journal of Parasitology, 85, 534-539.PubMedGoogle Scholar

Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Verónica A. Ivanov
    • 1
  1. 1.Laboratorio de Helmintología, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina

Personalised recommendations