Ahmad, J. (1980). On five new trematodes of the genus Uterovesiculurus Skrjabin et Guschanskaja, 1954 (Trematoda, Hemiuridae) from marine fishes of the Bay of Bengal. Acta Parasitologica Polonica. Vol. 27 No. 46/60 pp. 415-422.

198404

Ahmad, J.

1980

Vol. 27 No. 46/60 pp. 415-422

Publication

Uterovesiculurus thrissocli n.sp. from the stomach of Thrissocles mystax differs from all the known species of the genus in having the genital pore a little posterior to the intestinal bifurcation. It closely resembles U. paralichthydis in having a bipartite vesicula seminalis but differs by having an arcuate ovary, saccular oesophagus, slender body and an extracaecal anterior testis. U. yamagutii n.sp. from the stomach of Saurus myops closely resembles U. paralichthydis and U. thrissocli by having the bipartite vesicula seminalis but differs from both by having the ovary contiguous with the right testis, symmetrical testes and the vesicula seminalis extending up to the anterior margin of the ovary. It further differs from U. thrissocli by having the genital pore behind the oral sucker and a transversely ovoid ovary. U. gazzi n.sp. from the stomach of Gazza minuta differs from U. hamati, U. neopacificus and U. formosae by being larger (4.06 to 4.21 X 1.22 to 1.24 mm) and having the genital pore behind the pharynx, the ovary larger than testes, and vesicula seminalis antero-dorsal to the acetabulum. It further differs from U. hamati and U. formosae by having symmetrical testes and caeca extending to just short of the posterior extremity and from U. formosae by the absence of 2 muscular sphincters around the sinus sac. U. orientalis n.sp. from the stomach of Glyphidodon bengalensis differs from all the known species of the genus by having a tripartite vesicula seminalis. It closely resembles U. formosae but differs by having the genital pore behind the pharynx, the testes well separated from the acetabulum, a well developed receptaculum seminis, 2 muscular sphincters around the sinus sac, uterine folds extending anterior to the acetabulum and larger body size (3.35 to 4.10 mm) and the caeca do not enter the ecsoma. U. bengalensis n.sp. from the stomach of Pristipoma furcatum resembles U. paralichthydis, U. thrissocli and U. yamagutii in having a bipartite vesicula seminalis but differs from U. paralichthydis by having the testes close together, a larger posterior and smaller anterior part of the vesicula seminalis and larger eggs (25 to 36 X 15 to 20 mu m), from U. thrissocli by having the genital pore in the middle of the pharynx, a reniform ovary, and a larger acetabulum (550 to 610 mu m in diameter), and in having the vesicula seminalis not extending to the anterior margin of the posterior testis, the caeca not extending to the posterior end of the body and the right testis not extracaecal, and from U. yamagutii by having the testes diagonally tandem, the ovary contiguous with the right testis and a larger posterior and smaller anterior part of the vesicula seminalis, and in the vesicula seminalis not extending to the anterior margin of the ovary. The genus Uterovesiculurus is reviewed and is considered to be distinct from Erilepturus.

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