Acta Zoologica 48. (2002)

2002 / 1. szám - NAHHAS, F. M. - SEY OTTÓ: Digenetic trematodes from marine fishes off the Coast of Kuwait, Arabian Gulf: Superfamily Hemiuroidea

DIGENETIC TREMATODES (HEMIUROIDEA) FROM FISHES OFF THE COAST OF KUWAIT 3 placed in the United States National Parasite Collection (USNPC) and Harold W. Manter Labora­tory (HWML), University of Nebraska State Museum, Lincoln, Nebraska. Fishes were identified by using the monograph of Kuronuma and Abe (1986) and updated from Randall (1995). DESCRIPTION OF SPECIES Family Hemiuridae LOOSS, 1899 Allostomcichicola secundus (SRIVASTAVA, 1937) YAMAGUTI, 1958 (Figs 1-2) Stomachicola secundus Srivastava, 1937 Pseudostomachicola secundus (SRIVASTAVA, 1937) SKRJABIN and GUSCHANSKAJA, 1954 in part Host: Chirocentrus nudus (Forsskal) (Chirocentridae) Description based on one specimen. Body elongate, sub-cylindrical, muscular, 10,465x1000 at level of ventral sucker; soma 4,425; forebody 1,125, hindbody 2,500; ecsoma fully extended, 6,000. Tegument smooth. Pre-oral lip absent. Oral sucker subterminal, 450x500; ventral sucker 800x1,000; sucker ratio 1:1.89. Pre-pharynx absent; pharynx pear-shaped, 315x255; esophagus ab­sent; caeca, with prominent shoulders, extending posteriorly to near end of ecsoma. Testes inter-caecal, diagonal, almost contiguous, posterior to, but not overlapping, ventral sucker; anterior testis 410x350; posterior testis 450x385; seminal vesicle (Fig. 1) sac-like, 400x290, overlapping an­terior level of ventral sucker, connecting by short duct to pars prostatica; pars prostatica about as long as but narrower than seminal vesicle, consisting of ovoid vesicle surrounded by prostate cells, and joined by metraterm at base of muscular hermaphroditic duct; hermaphroditic duct thick-walled; ter­minal part about 400 in length, protruding from genital pore at junction of oral sucker and pharynx and extending horizontally to right side. Ovary tetralobed, three united centrally, the fourth loosely connected (Fig. 2), almost midway between posterior testis and end of soma; seminal receptacle and Laurer’s canal not evident; uterine coils extensive filling practically all ecsoma. Vitelline tubes long; four on right side and three indistinct on left just below ovary, overlapping caeca laterally, extending anteriorly to about posterior fourth of anterior testis and posteriorly entering short distance into ecsoma. Eggs 15-20x10-12. Genital pore at junction of oral sucker and pharynx. Excretory vesicle tubular; main canals uniting dorsal to junction of oral sucker and pharynx. Remarks. The stomachicoline hemiurids include several nominal genera {Stomachicola YAMAGUTI, 1934, Pseudostomachicola SKRJABIN et GUSCHAN­SKAJA, 1954, Allostomachicola YAMAGUTI, 1958, Acerointestinecola JEHAN, 1970, Cameronia BlLQEES, 1971, Segmentatum BlLQEES, 1971, Cestodera BlLQEES, 1971, and Indostomachicola GUPTA et SHARMA, 1973. The validity of some of these genera has been questioned by several investigators. GIBSON and BRAY (1979) considered Pseudostomachicola, Indostomachicola and Acerointestine­­cola synonyms of Stomachicola, a genus distinguished from Allostomachicola

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