Systematic Parasitology

, Volume 28, Issue 1, pp 65–79 | Cite as

Paraorygmatobothrium barberi n. g., n. sp. (Cestoda: Tetraphyllidea), with amended descriptions of two species transferred to the genus

  • T. R. Ruhnke


Paraorygmatobothrium n.g. (Cestoda: Tetraphyllidea) differs from all other phyllobothriid genera in having serrated microtriches on the proximal bothridial surfaces, two dorsal and two ventral scutes on the neck, and the presence of very small (<500 nm) triangular structures on the surface of the neck. No single light microscopical feature is sufficient to distinguish the new genus from other phyllobothriid genera. Phyllobothrium prionacis from Prionace glauca and Anthobothrium exiguum from Alopias vulpinus are transferred to the new genus and their descriptions are amended. Paraorygmatobothrium barberi n. sp. from Triakis semifasciata is also described, and can be distinguished from the other two species in being longer, having a greater number of segments, longer and wider mature segments, a greater number of testes, a longer cirrus-sac, a longer and wider ovary, a wider ovicapt, and a greater number of rows of dorsal and ventral vitelline follicles than the other two species. It also differs in the shape of the egg-shell and in the possession of a circular band of sub-tegumentary muscles in the middle third of each bothridium. Two of the species placed in the new genus have microtriches resembling an “ear of corn” on the distal bothridial surface. These microtriches are similar to structures reported for Phyllobothrium squali from the Squalus acanthias and Orygmatobothrium musteli from Mustelus henlei; this similarity in microtriche structure potentially indicates a systematic relationship between members of Paraorygmatobothrium and these two species.


Microscopical Feature Systematic Relationship Vitelline Follicle Triangular Structure Mature Segment 
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  1. BrooksD.R., MayesM.A. & ThorsonT.B. (1980) Cestode parasites in Myliobatis goodei Garman (Myliobatiformes: Myliobatidae) from Rio de la Plata, Uruguay, with a summary of cestodes collected from South American elasmobranchs during 1975–1979. Proceedings of the Biological Society of Washington, 93, 1,239–1,252.Google Scholar
  2. ButlerS.A. (1987) Taxonomy of some tetraphyllidean cestodes from elasmobranch fishes. Australian Journal of Zoology, 35, 343–371.Google Scholar
  3. CairaJ.N. & GavarrinoM.M. (1990) Grillotia similis (Linton, 1908) comb. n. (Cestoda: Trypanorhyncha) from nurse sharks in the Florida Keys. Journal of the Helminthological Society of Washington, 57, 15–20.Google Scholar
  4. CairaJ.N. & RuhnkeT.R. (1990) A new species of Calliobothrium (Tetraphyllidea: Onchobothriidae) from the Whiskery shark, Furgaleus macki, in Australia, Journal of Parasitology, 76, 319–324.PubMedGoogle Scholar
  5. CairaJ.N. & RuhnkeT.R. (1991) A comparison of scolex morphology between the plerocercoid and the adult of Calliobothrium verticillatum (Tetraphyllidea: Onchobothriidae). Canadian Journal of Zoology, 69, 1484–1488.Google Scholar
  6. Euzet, L. (1959) Recherches sur les cestodes tétraphyllides des sélaciens des côtes France. Thèses, Faculté des Sciences, Université de Montpellier, Montpellier, 263 pp.Google Scholar
  7. HennigW. (1966). Phylogenetic systematics. Urbana, Illinois: University of Illinois Press, 263 pp.Google Scholar
  8. LintonE. (1889) Notes on entozoa of marine fishes of New England. Annual Report of United States Commissioner of Fish and Fisheries, 14, 453–511.Google Scholar
  9. McCulloughJ.S. & FairweatherI. (1983) A SEM study of the cestodes Trilocularia acanthiaevulgaris, Phyllobothrium squali and Gilquinia squali from the spiny dogfish. Zeitschrift für Parasitenkunde, 69, 655–665.Google Scholar
  10. RichmondC. & CairaJ.N. (1991) Morphological investigations into Floriceps minacanthus (Trypanorhyncha: Lacistorhynchidae) with analysis of the systematic utility of scolex microtriches. Systematic Parasitology, 19, 25–32.Google Scholar
  11. RiserN.W. (1955) Studies on cestode parasites of sharks and skates. Journal of the Tennessee Academy of Science, 30, 265–311Google Scholar
  12. RuhnkeT.R. (1993) A new species of Clistobothrium (Cestoda: Tetraphyllidea), with an evaluation of the systematic status of the genus, Journal of Parasitology, 79, 37–43.Google Scholar
  13. SchmidtG. (1986) Handbook of tapeworm identification. Boca Raton, Florida: CRC Press, 675 pp.Google Scholar
  14. ThompsonC.A., HaytonA.R. & Jue SueL.P. (1980) An ultrastructural study of the microtriches of adult Proteocephalus tidswelli (Cestoda: Proteocephalidae), Zeitschrift für Parasitenkunde, 64, 95–111.Google Scholar
  15. WardleR.A. & McCleodJ.A. (1952) The zoology of tapeworms. Minneapolis: University of Minnesota Press, 780 pp.Google Scholar
  16. WhittakerF.H. & CarvajalJ. (1980) Scanning electron microscopy of scolices of some cestodes from elasmobranchs. Proceedings of the Helminthological Society of Washington, 47, 256–259.Google Scholar
  17. WhittakerF.H., ApkarianR.P., CurlessB. & CarvajalJ. (1985) Scanning electron microscopy of the scolices of cestodes Parachristianella monomegacantha Kruse 1959 (Trypanorhyncha) and Phyllobothrium sp. (Tetraphyllidea). Journal of Parasitology, 71, 376–381.Google Scholar
  18. WilliamsH.H. (1968) The taxonomy, ecology, and host-specificity of some Phyllobothriidae (Cestoda: Tetraphyllidea), a critical revision of Phyllobothrium Beneden, 1849, and comments on some allied genera. Philosophical Transactions of the Royal Society of London, Series B, 253, 231–307.Google Scholar
  19. YamagutiS. (1934) Studies on the helminth fauna of Japan. IV. Cestodes of fishes, Japanese Journal of Zoology, 6, 1–112.Google Scholar
  20. YamagutiS. (1935) Studies on the helminth fauna of Japan. VI. Cestodes of birds, I, Japanese Journal of Zoology, 6, 183–232.Google Scholar

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • T. R. Ruhnke
    • 1
  1. 1.Department of Ecology and Evolutionary BiologyThe University of ConnecticutStorrsUSA

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