Two new species of entobdelline skin parasites [Monogenea, Capsalidae] from the blotched fantail ray, Taeniura meyeni, in the Pacific Ocean, with comments on spermatophores and the male copulatory apparatus

• Autorzy: Whittington I D , Kearn G.C.
• Języki publikacji: EN

Abstrakty

EN

We made a comparative anatomical study of entobdelline monogenean skin parasites from the blotched fantail ray, Taeniura meyeni (= T. melanospila) from public aquaria and fish-holding facilities distributed widely across the western Pacific Ocean. These facilities were located in Australia (Mooloolaba, southern Queensland; Cairns, northern Queensland), Taiwan and Japan. The capture localities of the aquarium fishes are unknown to us, with the exception of the individual fish from northern Queensland which came from Sudbury Reef, a local inshore reef. Entobdellines from southern Queensland differed morphologically from those from northern Queensland and Taiwan and the 2 new monogenean species are described and named Neoentobdella garneri sp. nov. and N. taiwanensis sp. nov., respectively. We determined that an entobdelline collected by Dyer and co-workers from a ray identified as T. melanospila (= T. meyeni) from an aquarium in Okinawa, Japan and identified by them as Entobdella squamula (Heath, 1902) Johnston, 1929 was misidentified and is tentatively assigned to N. taiwanensis sp. nov. The male copulatory organ of each new species resembles a penis, but evidence that these organs are eversible like a cirrus is presented. Caution is advised in deciding whether the male copulatory organs of capsalids may function as a penis or as a cirrus and we suggest that possession of a penis versus a cirrus may not necessarily indicate wide evolutionary divergence. In N. garneri, spermatophores consist of a sausage-shaped capsule and a long hollow stalk. A spermatophore received from a donor is anchored in the vagina by means of the stalk, with the capsule protruding outside the body.

Słowa kluczowe

EN

skin parasite; spermatophore; Monogenea; Pacific Ocean; Capsalidae; new species; Entobdellinae; public aquarium; Taeniura meyeni; monogenean parasite; male; functional morphology; Platyhelminthes; Neoentobdella; copulatory apparatus; penis; cirrus

• Wydawca: -
• Czasopismo: Acta Parasitologica
• Rocznik: 2009
• Tom: 54
• Numer: 1
• Strony: 12-21
• Opis fizyczny: p.12-21,fig.,ref.

Twórcy

autor

Whittington I D

• The South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia

autor

Kearn G.C.

Bibliografia

• Dyer W.G., Williams E.H.Jr., Bunkley Williams L. 1989. Monogeneans from marine fishes of Okinawa, Japan. Proceedings of the Helminthological Society of Washington, 56, 64–68.
• El-Naggar M.M., El-Naggar A.A., Kearn G.C. 2004. Swimming in Gyrodactylus rysavyi (Monogenea, Gyrodactylidae) from the Nile catfish, Clarias gariepinus. Acta Parasitologica, 49, 102–107.
• Froese R., Pauly D. (Eds.). 2008. FishBase. World Wide Web electronic publication. www.fishbase.org, version (07/2008).
• Kearn G.C. 1979. Studies on gut pigment in skin-parasitic monogeneans, with special reference to the monocotylid Dendromonocotyle kuhlii. International Journal for Parasitology, 9, 545–552. DOI: 10.1016/0020-7519(79)90011-0.
• Kearn G.C. 1998. Parasitism and the Platyhelminths. Chapman & Hall, London, U.K., 544 pp.
• Kearn G.C. 1999. The survival of monogenean (platyhelminth) parasites on fish skin. Parasitology, 119, S57–S88.
• Kearn G.C., Whittington I.D. 1991. Swimming in a sub-adult monogenean of the genus Entobdella. International Journal for Parasitology, 21, 739–741. DOI: 10.1016/0020-7519(91)90 090-T.
• Kearn G.C., Whittington I.D. 2005. Neoentobdella gen. nov. for species of Entobdella Blainville in Lamarck, 1818 (Monogenea, Capsalidae, Entobdellinae) from stingray hosts, with descriptions of two new species. Acta Parasitologica, 50, 32–48.
• Kearn G.C., Whittington I.D., Evans-Gowing R. 2007. Arevision of Entobdella Blainville in Lamarck, 1818, with special emphasis on the nominal (type) species. Entobdella hippoglossi (Müller, 1776) Blainville, 1818. (Monogenea: Capsalidae: Entobdellinae) from teleost flatfishes, with descriptions of three new species and a new genus. Zootaxa, 1659, 1–54.
• Last P.R., Stevens J.D. 1994. Sharks and rays of Australia. CSIRO Division of Fisheries, Australia, 513 pp.
• Llewellyn J., Euzet L. 1964. Spermatophores in the monogenean Entobdella diadema Monticelli from the skin of sting-rays, with a note on the taxonomy of the parasite. Parasitology, 54, 337–344.
• Tappenden T., Kearn G.C., Evans-Gowing R. 1993. Fertilization and the functional anatomy of the germarium in the monogenean Entobdella soleae. International Journal for Parasitology, 23, 901–911. DOI: 10.1016/0020-7519(93)90056-5.
• Whittington I.D., Kearn G.C. 2008. Trimusculotrema heronensis sp. nov. (Monogenea, Capsalidae) from the skin of the pink whipray Himantura fai (Elasmobranchii, Dasyatidae) from Heron Island, Queensland, Australia. Acta Parasitologica, 53, 251–257. DOI: 10.2478/s11686-008-0044-5.
• Whittington I.D, Kearn G.C. Two new species of Neoentobdella (Monogenea, Capsalidae, Entobdellinae) from the skin of Australian stingrays (Dasyatidae). Folia Parasitologica, in press.
• Whittington I.D., Deveney M.R., Wyborn S.J. 2001. A revision of Benedenia Diesing, 1858 including a redescription of B. sciaenae (van Beneden, 1856) Odhner, 1905 and recognition of Menziesia Gibson, 1976 (Monogenea: Capsalidae). Journal of Natural History, 35, 663–777. DOI: 10.1080/0022293015 2023090.