Trematodes from Red Sea fishes: Proneohelicometra aegyptensis gen.nov., sp.nov. [Opecoelidae Ozaki, 1925] and Neohypocreadium gibsoni sp.nov. [Lepocreadiidae Odhner, 1905]

• Autorzy: Hassanine Reda M El-S
• Języki publikacji: EN

Abstrakty

EN

Specimens of the fishes Pterois volitans Linnaeus (Scorpaenidae) and Chaetodon auriga Forsskål (Chaetodontidae) were caught in the Red Sea off the coast of Sharm El-Sheikh, South Sinai, Egypt. Five (20%) and 20 (44%) of these fishes, respectively, were found to harbour intestinal trematodes. P. volitans was parasitised by Proneohelicometra aegyptensis gen. nov., sp. nov. (Opecoelidae) and C. auriga by Neohypocreadium gibsoni sp. nov. (Lepocreadiidae). Proneohelicometra gen. nov. is similar to Neohelicometra Siddiqi et Cable, 1960 which is the only opecoelid genus having caeca opening with separate ani and eggs with unipolar filaments, but differs significantly from it in having two lateral folds of body wall extending along the posterior third of body, an oral sucker smaller than the ventral sucker, a median cirrus sac not reaching the ventral sucker posteriorly and a median genital pore situating immediately posterior to the intestinal bifurcation. Neohypocreadium gibsoni sp. nov. is similar to the other four species of the genus, but is unique in having a distinctly pear-shaped body and a much smaller egg size, and differs significantly from each in several other characters: from N. longisaccatum, it differs in having a cirrus sac not reaching the testes and a pretesticular ovary; from N. dorsoporum in having an external seminal vesicle much shorter than the cirrus sac, a longer cirrus sac extending posteriorly to the level of the posterior margin of the ventral sucker and a pretesticular ovary; from N. chaetodoni in having a smaller body size, symmetrical testes, a longer cirrus sac extending posteriorly to the level of the posterior margin of the ventral sucker and a trilobed ovary; and from N. aegyptense in having a smaller body size, symmetrical testes, a longer cirrus sac extending posteriorly to the level of the posterior margin of the ventral sucker, a trilobed ovary and vitelline follicles terminating anteriorly at the level of oesophagus. Neohypocreadium Machida et Uchida, 1987 is briefly reviewed.

Słowa kluczowe

EN

Opecoelidae; fish; Proneohelicometra aegyptensis; Chaetodontidae; Chaetodon auriga; Scorpaenidae; Pterosis volitans; Neohypocreadium gibsoni; trematode; Lepocreadiidae; Trematoda; Red Sea

• Wydawca: -
• Czasopismo: Acta Parasitologica
• Rocznik: 2006
• Tom: 51
• Numer: 4
• Opis fizyczny: p.249-254,fig.,ref.

Twórcy

autor

Hassanine Reda M El-S

• Assiut Universioty, El-Kharga, New Valley, Egypt

Bibliografia

• Bray R.A. 2005. Family Lepocreadiidae Odhner, 1905. In: Keys to the Trematoda. Vol. 2 (Eds. A. Jones, R.A. Bray and D.I. Gibson). CABI Publishing and The Natural History Museum, London, 545–602.
• Bray R.A., Cribb T.H., Barker S.C. 1994. Fellodistomidae and Lepocreadiidae (Platyhelminthes: Digenea) from chaetodontid fishes (Perciformes) from Heron Island, Southern Great Barrier Reef, Queensland, Australia. Invertebrate Taxonomy, 8, 545–581.
• Cribb T.H. 2005. Family Opecoelidae Ozaki, 1925. In: Keys to the Trematoda. Vol. 2 (Eds. A. Jones, R.A. Bray and D.I. Gibson). CABI Publishing and The Natural History Museum, London, 443–531.
• Froese R., Pauly D. 2006. FishBase. World Wide Web electronic publication. www.fishbase.org, version 06/2006.
• Hassanine R.M.El-S. 2005. Trematodes from Red Sea fishes: Gibsonius aegyptensis gen. nov., sp. nov. (Lepocreadiidae Odhner, 1905) and Helicometra interrupta sp. nov. (Opecoelidae Ozaki, 1925). Acta Parasitologica, 50, 276–280.
• Hassanine R.M.El-S. 2006a. Trematodes from Red Sea fishes: Pachycreadium lethrini sp. nov. (Opecoelidae Ozaki, 1925) and Pseudometadena aegyptensis sp. nov. (Cryptogonimidae Ward, 1917), with a review of their genera. Acta Parasitologica, 51, 176–181.
• Hassanine R.M.El-S. 2006b. The life-cycle of Diploproctodaeum arothroni Bray and Nahhas, 1998 (Digenea: Lepocreadiidae), with a comment on the parasitic castration of its molluscan intermediate host. Journal of Natural History, in press.
• Hassanine R.M.El-S., Gibson D.I. 2005a. Trematodes of Red Sea fishes: Hexangium brayi n. sp. (Angiodictyidae Looss, 1902) and Siphodera aegyptensis n. sp. (Cryptogonimidae Ward, 1917), with a review of their genera. Systematic Parasitology, 61, 215–222.
• Hassanine R.M.El-S., Gibson D.I. 2005b. Trematodes from Red Sea fishes: Neohypocreadium aegyptense n. sp. (Lepocreadiidae), Fairfaxia cribbi n. sp. and Macvicaria chrysophrys (Nagaty et Abdel-Aal, 1969) (Opecoelidae). Systematic Parasitology, 62, 199–207.
• Linton E. 1910. Helminth fauna of the Dry Tortugas. II. Trematodes. Papers from the Tortugas Laboratory of the Carnegie Institute of Washington, 133, 11–98.
• Machida M., Uchida K. 1987. Two new lepocreadiid trematodes from butterfly fishes of southern Japan. Bulletin of the National Science Museum, Tokyo, Ser. A, 13, 53–40.
• Randall J.E. 1983. Red Sea Reef Fishes. IMMEl Publ. Co, London.
• Siddiqi A.H., Cable R.M. 1960. Digenetic trematodes of marine fishes of Puerto Rico. Scientific Survey of Porto Rico and Virgin Islands, 17, 257–369.
• Toman G. 1989. Digenetic trematodes of marine teleost fishes from the Seychelles, Indian Ocean. II. Acta Parasitologica Polonica, 34, 235–246.
• Toman G. 1992. New synonyms for Pseudohypocreadium Toman, 1989, and Apolemichthytrema Toman, 1989. Acta Parasitologica, 37, 225.