Folia Parasitologica, vol. 53 (2006), issue 4

Folia Parasitologica 53[4] 255-275 (2006) | DOI: 10.14411/fp.2006.033

Three new genera and seven new species of trypanorhynch cestodes (family Eutetrarhynchidae) from manta rays, Mobula spp. (Mobulidae) from the Gulf of California, Mexico

Ronald A. Campbell1,2, Ian Beveridge3
1 Department of Biology, University of Massachusetts-Dartmouth, N. Dartmouth, Massachusetts, USA
2 Current address: 415 Highfield Road, Salem, Virginia 24153, USA
3 Department of Veterinary Science, University of Melbourne, Veterinary Clinical Centre, Werribee, Victoria 3030, Australia

Three new genera of eutetrarhynchid trypanorhynch cestodes are described from Mobula spp. (Mobulidae) from the Gulf of California, Mexico. Fellicocestus mobulae gen. et sp. n. from the gall bladder of Mobula japonica (Müller et Henle) is distinguished by elongate bothria, a pars bothrialis equal in length to the pars vaginalis, masses of gland cells in the pars vaginalis and an heteromorphous armature in which hook rows arise from a central file of hooks on the bothrial surface of the tentacle and terminate in a central file on the antibothrial surface. Species of Mobulocestus gen. n. occur in the nephridial system and cloaca of rays and are characterized by two bothria, an heteroacanthous armature with hook rows beginning on the bothrial surface and terminating on the antibothrial surface, and by hooks at the beginnings of rows with an apical cavity. M. nephritidis sp. n. and M. lepidoscolex sp. n., both from the nephridial system of Mobula thurstoni (Lloyd) are differentiated by testis number and by the presence of scale-like microtriches on the tegument of the scolex of M. lepidoscolex. M. mollis sp. n., from the cloaca of Mobula thurstoni is distinguished by testis number (97-111 in M. lepidoscolex, 20-22 in M. nephriticus and 48-70 in M. mollis). Hemionchos gen. n. from the spiral valve of Mobula spp. has two bothria, an heteroacanthous armature, hook rows arising on the bothrial surface and terminating on the antibothrial surface and hooks at the beginning of rows with an apical cavity. It differs from Mobulocestus in having a distinctive basal armature and both hook files 1 and 1' on the bothrial surface, but has an additional, small, satellite hook adjacent to each hook 1'. H. striatus sp. n. from the spiral valve of Mobula thurstoni and M. japonica is differentiated by having a basal armature of closely packed arrays of small, uncinate hooks. H. mobulae sp. n. from the spiral valve of Mobula japonica and M. munkiana Notarbartolo di Sciari, differs in testis number and in having large, flattened hooks in the basal armature. H. maior sp. n., from the spiral valve of M. japonica, is larger, differing in both the number of testes and in the basal armature.

Keywords: Cestoda, Trypanorhyncha, Eutetrarhynchidae, Fellicocestus, Mobulocestus, Hemionchos, taxonomy, new genera, Mobulidae

Received: May 11, 2006; Accepted: June 28, 2006; Published: December 1, 2006


References

  1. BEVERIDGE I., CAMPBELL R.A., JONES M.K. 2000: New records of the cestode genus Pseudotobothrium (Trypanorhyncha: Otobothriidae) from Australian fishes. Trans. R. Soc. S. Aust. 124: 151-162
  2. BEVERIDGE I., NEIFAR L., EUZET L. 2004: Eutetrarhynchid cestodes from Atlantic and Mediterranean elasmobranch fishes, with the description of two new species of Dollfusiella Campbell & Beveridge, 1994 and redescriptions of Prochristianella papillifer (Poyarkoff, 1909) Dollfus, 1957 and Parachristianella trygonis Dollfus, 1946. Syst. Parasitol. 59: 81-102 Go to original source... Go to PubMed...
  3. CAMPBELL R.A., BEVERIDGE I. 1994: Order Trypanorhyncha Diesing, 1863. In: L.F. Khalil, A. Jones and R.A. Bray (Eds.), Keys to the Cestode Parasites of Vertebrates. CAB International, Wallingford, pp. 51-148
  4. DOLLFUS R.-P. 1942: Etudes critiques sur les Tetrarhynques du Museum de Paris. Arch. Mus. Natl. Hist. Nat. 6eme ser. 19: 1-466
  5. ESCHMEYER W.N. 1998: Catalog of Fishes. California Academy of Sciences, Anaheim, California, 2905 pp
  6. JONES M.K., BEVERIDGE I., CAMPBELL R.A., PALM H.W. 2004: Terminology of the sucker-like organs of the scolex of trypanorhynch cestodes. Syst. Parasitol. 59: 121- 126 Go to original source... Go to PubMed...
  7. LAST P.R., STEVENS J.D. 1994: Sharks and Rays of Australia. CSIRO, Australia, 513 pp
  8. PALM H.W. 2004: The Trypanorhyncha Diesing, 1863. PKSPL-IPB Press, Bogor, 710 pp
  9. PRITCHARD M.H., KRUSE G.O.W. 1982: The Collection and Preservation of Animal Parasites. University of Nebraska Press, Lincoln, 141 pp