【摘要】 <正> 我国海岸线甚长,沿海鱼类丰富。寄生于鱼体的吸虫种类繁多,其中半尾亚目(Hemiuroidea)吸虫是一大类群。根据Skrjabin与Guschans-kaza(1954—1960)多年的整理,包括有15科,36亚科和105属。Yamaguti(1971)将它们修订为1总科、8科、26亚科、97属。此类吸虫绝大多数寄生于鱼类(包括海水、咸淡水及淡水鱼类),少数也见于两栖类和爬行类。国内有关本类吸虫的研究虽有些报道(唐仲璋,1951,1981;许鹏如,1954;叶英和吴淑卿,1955;唐崇惕和唐仲璋,1959;顾更多还原

【Abstract】 In this paper, two new genera and seven new species of hemiurid trematodes collected from the digestive tract of some marine fishes found in southern Fujian off the mouth of Jiulong River in January, 1979 are described. All specimens are deposited in the Parasitology Research Laboratory, Xiamen University.1. Parahemiurus ambassicola Tang, Shi et Cao, sp. nov. (fig. 3)Three specimens were secured from Ambassis gymnocephalus. This species differs from the closely resembled species P. dogieli and P. swdiniae, in its smaller body and larger eggs, and it differs from P. dogieli in the position of the pars prostatiea and in the bipartite seminal vesicle, and from P. sardiniae in having a longer tail, ceca not entering tail portion, and gonads immediately behind acetabulum.2. Hysterolecithoides multiglandularis Tang, shi et Guan, sp. nov. (fig. 2) Seventeen specimens were collected from Lewgnathus brevirostris. This speciesresembles H. epinepheli but differs distinctly from it in the smaller body, and in having a larger acetabulum-sucker ratio of 1: 2.5-2.7, and vitellaria consisting of seven coiled tubular lobes between testes and ovary.3. Aphanurus stossiehi (Monticelli, 1891) Looss, 1907 (fig. 1) Specimens were found from Clupanodon punctatus.Neoaphanurus Tang, Shi et Pan, gen nov.Generic diagnosis: Lecithasterinae. Body fusiform, finely annulated, without tail. Oral sucker subterminal, pharynx well developed, ceca terminating at posterior extremity. Acetabulum larger than oral sucker, in anterior one-fourth of body. Testes diagonal, behind acetabulum. Large tubular seminal vesicle coils occupying large portion of posterior one-third of body. Pars prostatiea well developed, surrounded with prostatic gland cells, which are covered by a thin membrane. Hermaphroditic duct enclosed in pouch, opening midventrally between two suckers. Ovary compact, ventral to posterior testis. Seminal receptacle present. Vitellarium single, compact, posterior to ovary. Uterus extending to near posterior extremity. Parasitic in marine teleosts.It differs distinctly from related genera of Lecithasterinae Odhner, 1905 in the following main features: 1. vitellarium single, compact; 2. Pars prostatiea large, sur- rounded with large prostatic gland cells, enclosed by a thin membrane; 3. large tabular seminal vesicle coils occupying large portion of posterior one-third body. Type species: Neophanurus magniprotesticns, sp. nov.4. Neoaphanurus magniprotesticw Tang, Shi et Pan, sp. nov. (fig. 5)One specimen was secured from Coilia, mystus.5. Neodichadena mugilis Tang, Shi et Cao, sp. nov. (fig. 4)Eleven specimens were found from Mugil engdi. The chief differential characters of the new species are the size of body, eggs and acetabulum, the position of seminal vesicle and the shape of vitellaria.Paramacradenina Tang, Shi et Guan, gen. nov.Generic diagnosis: Macradenininae. Body fusiform, smooth, with tail. Oral sucker longer than wide, pharynx globular, esophagus short, ceca not reaching posterior extremity. Testes obliquely in posterior one-third of body. Seminal vesicle tubular, long and winding. Pars prostatica short. Hermaphroditic tube small. Genital pore about midway between two suckers. Ovary unlobed, between acetabulum and tes-tes. Seminal receptacle postovarian. Vitellaria composed of several short branched tubules, between the ovary and testes, extending to dorsal region of the posterior extremity of ceca. Uterus occupying most of the area before the gonads as well as prea-cetabular region. Intestinal parasites of marine teleosts.This new genus is most closely related to Macradenina, Manter, 1947 by the post-ovarian testes, tubular seminal vesicle, hermaphroditic pouch and genital pore about midway between two suckers, and acetabulum larger than oral sucker, but it differs in having a tail, the ceca not reaching to posterior extremity, more longer tubular seminal vesicle, Pars prostatica anterior to acetabulum, unlobed ovary, and vitellaria composed of several short branched tubules.Type species: Paramacradenina xiamenensis, sp. nov.6. Paramacrade更多还原