Abstract
Redescriptions are provided of Otobothrium carcharidis (Shipley & Hornell, 1906), O. crenacolle Linton, 1890, O. curtum (Linton, 1909) and O. propecysticum Dollfus, 1969 based on the type specimens and new material collected from elasmobranch hosts from Australia, Malaysia and New Caledonia. All are considered to be valid species. A neotype has been designated for O. crenacolle. A new species, O. parvum, is described from the spiral valve of Carcharhinus amblyrhynchos (Bleeker, 1856) and Triaenodon obesus (Rüppell, 1837) from New Caledonia. Otobothrium minutum Subhapradha, 1955 is considered to be a valid but poorly described species, being differentiated on the basis of a lack of testes posterior to the ovary. Otobothrium cysticum (Meyer, 1842) is considered a species inquirenda. The presence of an hermaphroditic sac is a new character for the genus while O. curtum lacks bothrial pits, a characteristic found in all congeners examined. The species described or redescribed here can be distinguished based on the number of segments and the number and distribution of testes, in addition to the features of the scolex. Otobothrium crenacolle is readily distinguished by its larger bothrial pits. The metabasal armature begins on either the bothrial or internal surface of the tentacle depending upon the species.References
Beveridge, I. & Campbell, R.A. (1998) Re-examination of the trypanorhynch cestode collections of A.E. Shipley, J. Hornell and T. Southwell, with the erection of a new genus, Trygonicola, and redescriptions of seven species. Systematic Parasitology, 39, 1–34.
Beveridge, I., Campbell, R.A. & Jones, M.K. (2000) New records of the cestode genus Pseudotobothrium (Trypanorhyncha: Otobothriidae) from Australian fishes. Transactions of the Royal Society of South Australia, 124, 151–162.
Beveridge, I., Neifar, L & Euzet, L. (2004) Eutetrarhynchid cestodes from Atlantic and Mediterrranean 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. Systematic Parasitology, 59, 81–102.
Campbell, R.A. & Beveridge, I. (1994) Order Trypanorhyncha Diesing, 1863. In : Khalil, L.F., Jones, A. & Bray, R.A. (Eds.) Keys to the Cestode Parasites of Vertebrates. Commonwealth Agricultural Bureaux International, Wallingford, pp. 51–148.
Compagno, L.J.V. (1984) Sharks of the World. FAO Fisheries Synopsis No. 125. Food and Agriculture Organization of the United Nations, Rome, 655 pp.
Dollfus, R.-P. (1942) Etudes critiques sur les Tétrarhynques du Muséum de Paris. Archives du Muséum national d'Histoire naturelle, Paris, 19, 1–466.
Dollfus R.-P. (1969) De quelques cestodes tétrarhynques (hétéracanthes et
pécilacanthes) récoltés chez des poissons de la Méditerranée. Vie et Milieu, Série A, 20, 491–542.
Eschmeyer, W.N. (1998) Catalog of Fishes. California Academy of Sciences,
San Francisco, pp. 2905.
Jones, M.K., Beveridge, I., Campbell, R.A. & Palm, H. (2004) Terminology of the sucker-like organs of the scolex of trypanorhynch cestodes. Systematic Parasitology, 59, 121–126.
Linton, E. (1890) Notes on Entozoa of marine fishes of New England, with descriptions of several new species. Part II. Annual Report of the Commissioner for Fish and Fisheries, Washington, 1887: 719–900.
Linton, E. (1901) Parasites of fishes of the Woods Hole region. Bulletin of the United States Fish Commission for 1899, 19, 405–492.
Linton, E. (1905) Parasites of fishes of Beaufort, New Carolina. Bulletin of the Bureau of Fisheries, 1904, 24, 321–428.
Linton, E. (1907a) A cestode parasite in the flesh of the butterfish. Bulletin of the United States Bureau of Fisheries, 26, 111–132.
Linton, E. (1907b) Notes on parasites of Bermuda fishes. Proceedings of the United States National Museum, 33, 85–126.
Linton E. (1909) Helminth fauna of the Dry Tortugas. I. Cestodes. Papers from the marine biological institute at Tortugas. Carnegie Institution of Washington, 102, 157–190.
Linton, E. (1910) Notes on the flesh parasites of marine food fishes. Bulletin of the Bureau of Fisheries, 1908, 28, 1197–1209.
Linton, E. (1924) Notes on cestode parasites of sharks and rays. Proceedings of the United States National Museum, 64, 1–114.
Palm, H.W. (1995) Untersuchungen zur Systematik von Rüsselbandwürmen (Cestoda: Trypanorhyncha) aus atlantischen Fischen. Berichte aus dem Institut für Meereskunde an der Christian-Albrechts Universität, Kiel, 92, 69–79.
Palm, H.W. (1997) Trypanorhynch cestodes of commercial fishes from northeast Brazilian coastal waters. Memorias do Instituto Oswaldo Cruz, 92, 69–79.
Palm, H.W. (2004) The Trypanorhyncha Diesing, 1863. PKSPL-IPB Press, Bogor, 710 pp.
Palm, H., Obiekezie, A. & Möller, H. (1994) Trypanorhynchid cestodes of commercial inshore fishes of the west African coast. Aquatic Living Resources, 7, 153–164.
Palm, H.W. & Overstreet, R.M. (2000) Otobothrium cysticum (Cestoda: Trypanorhyncha) from the muscle of butterfishes (Stromateidae). Parasitology Research, 86, 41–53.
Pintner, T. (1913) Vorarbeiten zu einer Monographie der Tetrarhynchoideen. Sitzungsberichte aus dem Mathematische Naturwissen Klasse der Kaiserliche Akademie der Wissenschaftlichen, Wien, 122, 1–83.
Schmidt, G.D. (1986) Handbook of tapeworm identification. CRC Press, Boca Raton, 675 pp.
Subhapradha, C.K. (1955) Cestode parasites of fishes of Madras coast. Indian Journal of Helminthology, 7, 41–132.
Yamaguti, S. (1959) Systema helminthum. II. The cestodes of vertebrates. Interscience Publishers, New York, pp. 860.