摘要
发状科(Gorgoderidae Looss,1901)吸虫,在美国、日本、印度、苏联、中国,非洲及欧洲等地区均有报道,其种类亦日渐增多。在我国首先由杜氏(1930)在成都淡水虾内发现,其后有吴光、蔡尚达(1955)、郎所、怀明德、金大雄、王伟俊、潘金培和福建师范大学共报道叶形属吸虫13种,其中寄生于鱼类者11种。
The present paper reports 12 species of Phyllodistomum obtained from 13 species of freshwater fishes in the Boyang Lake of Jiangxi Province during the years 1975-1981.Of these species,two are found to be new species,one is reported for the first time from China,one species undetermined.Descriptions of the new species are given below.1.Phyllodistomum(.Phyllodistomum)hemiculteri sp.nov.Body elongate pear-shaped,smooth,narrow at the anterior end,round at the posterior end,2.29-3.13×0.52-0.83 mm.Oral sucker terminal,spherical,0.208-0.257×0.208-0.257 mm,larger than ventral sucker,latter 0.174-0.229×0.174-0.229 mm,at 0.87-1.14 mm from anterior extremity.Oesophagus 0.37-0.45 mm,caeca bifurcation between both suckers,caeca hind end at 0.21-0.33 mm from posterior extremity.Testes two,large,longitudinally slightly lobed,digonal,anterior one right,0.208-0.333×0.145-0.270 mm,posterior one left,0.187-0.416×0.124-0.312 mm,latter at 0.354-0.937 mm from posterior extremity,not overlying the caeca.Ovary with 3 lobes,on the left,between vitellaria and posterior testes,0.208-0.270×0.124-0.249 mm.Vitellaria oval,slightly away from ventral sucker,overlying caeca,left 0.095-0.187×0.071-0.145 mm,right 0.124-0.208×0.083-0.124 mm.Uterine coils lying between the two caeca,but not overlying them.Excretory bladder small,sac-shaped.Eggs oval,yellow-brown,0.042-0.054×0.024-0.029 mm.Up to now,in the subgenus Phyllodistomum Pigulevsky,1952 of the genus Phyllodisto-mum Braum,1899,only two species:P.(P.)pearsei Holl,1929 and P.(P.)sinipercae Long et Wai,1958 were known to have their oral sucker larger than ventral sucker.The former testes small and no lobes,uterine coils overlying external lateral of caeca;the latter with spinous,hind-body nearly triangle,testes very large,eggs 0.029-0.036×0.019-0.025mm.This species differs from all the known ones of the genus.Host Hemieulter leucisculus(Basilewsky).Locality Excretory bladder.Location Poyang Lake.2.Phyllodistomum(Phyllodistomum)plagiognathops sp.nov.Body elongate or pear-spinous,4.08-6.04×1.77-2.08 mm,wider at ovary region.Oral sucker spherical,terminal,smaller than the ventral sucker,0.43-0.62×0.41-0.52 mm.Ventral sucker situated preequatorial or equatorial,0.56-0.79×0.58-0.79 mm.Oesophagus short,0.27-0.31 mm.Caeca extending upto the hind end.Testes two,diagonal,slightly lobed,rather large,anterior one 0.68-0.93×0.53-0.72 mm,posterior one 0.56-1.04×0.58-0.77 mm,its hind end at 0.42-0.74 mm from posterior extremity.Ovary on the right or left,transversely or longitudinally,slightly lobed,0.18-0.62×0.27-.042 mm.Vitellaria oval,situated on ech side in the posterior edge of ventral sucker,left one 0.21-0.27X0.21-0.31 mm,right one 0.22-0.27×0.15-0.21 mm.Excretory bladder tube-shaped.Eggs oval,yellow-brown,0.074-0.091×0.054-0.074 mm.The new species differs from its closely related species P.(P.)folium Olfers,1816;P.(P.)angulatum Linstow,1907 in having larger body,testes and eggs,and the ventral sucker,ovary,vitellaria and testes not overlying caeca.The new species closely resembles P.(P.)dogieli Pigulevsky,1953;P.(P.)fausti Pearse,1924 but is distinguished from the latter in testes which are slightly lobed,vitellaria oval,eggs larger.Host Plagiognathops microleopsis(Bleeker);Paracanthobrama guichenoti Bleeker.Locality Excretory bladderLocation Boyaug Lake.3.Phyllodistomum(C.)sp.A single specimen is found in the urinary bladder of Pseudobagrus fulidraca(Rich.)and seems to be different from all known species.It needs,however,further studies.4.Phyllodistomum(Vitellarinus)elongatum Nybelin,1926This species was first reported from China in Saurogobio dabryi Bleeker.
作者
王溪云
Wang Xiyun(Institute of Microbiology,the Academy of Science of Jiangxi Province)
出处
《海洋与湖沼》
1984年第1期98-104,共7页
Oceanologia Et Limnologia Sinica
