Abstract
Three new digenetic species belonging to Bucephalidae Poch0,1907,Paramphis-tomidae Fischoeder, 1901 and Gorgoderidae Looss,1901 respectively were found fromfislies and are described in this article. All the measurements are in millimetres.Type and Paratype specimens are deposited in the Laboratory of Fish Diseases,Institute of Hvdrobiology, The Chinese Academy of Sciences Bucephalidae Poche,1907(1).Bucephalopsis mystis sp. nov.(Fig.1)Host:Mystus macropterus(Bleeker)Location:intestine Locality: Yinjiang County, Guizhou Province Body long spindle-shaped, spinulate, 0.75-1.57*0.25-0.53. Anterior sucker 0.047-0.090*0.043-0.076. Intestine saccular 0.082-0.21*0.054-0.088. Two testes tandem laterally in posterior 3/4 of body, anterior testis 0.071-0.18*0.095-0.18, posterior testis 0.086-0.18*0.071-0.22. Cirrus pouch 0.18-0.40*0.056-0.094, vesicula seminals 0.076-0.17*0.043-0.065. Ovary 0.065-0.19*0.065-0.16.Vitellaria forming two lateral or middle groups of 15-16 follicles each above ovary.Egg ellipsoid, 0.020-0.032*0.010-0.017. This species resembles B. pseudobagri Wang,1980 and B. scombropsis Yamaguti,1938,but differs from them in:body cuticle covered densely by minute spines;sucker,pharynx,intestine and cirrus pouch much smaller,inspite of the similar sizein all the three species,pharynx behind intestine saccula;without hook-like lamellaon sucker as described by Yamaguti(1938)and Wang(1980)in their fixed andnon-fixed specimens.Paramphistomidae Fischoeder,1901(2).Neocladorchis wujiangensis sp. nov.(Fig.2)Host:Barbodes sinensis(Bleeker),Ctenopharyngodon idellus [Curieret Valehcie-mes]Location: intestine Locality: Pengshui County, Sichuan Province Body 2.30-5.87*0.76-1.38. Oral sucker with large diverticles oral sucker 0.30-0.59*0.30-0.56, diverticle 0.15-0.26*0.13-0.25. Esophageal bulb 0.13-0.30*0.12-0.17. Acetabulum 0.48-0.89*0.52-1.01. Testes with irregular incisions, anterior testis 0.39-0.63*0.36-0.69, posterior testis 0.39-0.61*0.31-0.72.Cirrus pouch 0.17-0.39*0.12-0.19, genital pore befurcal. Ovary nearly rounded,0.14-0.30*0.16-0.28. Egg 0.076-0.12*0.045-0.064. Lymph vessels three on each side.This species resembles N. poonaensis Bhalerao,1937,but differs from it in:vitellaria extending outside the ceca between the front or middle level of posteriortestis and acetabulum, ovary at the middle of posterior testis and acetabulum,egg sliorter.0.0760-0.12*0.0450-0.064. Gorgoderidae Looss,1901(3).Phyllodistomum(Vittellarinus)cyprini sp. nov.(Fig.3)Host: Cyprinus carpio L.LocatiOn: ureter Localitv:Daye County, Hubei Province Body elongate-oval, dorsoventrally flattened, covered with conical spines, mature body 4.46-6.78*1.28-1.80. Oral sucker 0.36-0.46*0.37-0.46, acetabulum 0.32-0.40*0.29-0.37, intercecal. Esophagus short, 0.11-0.25, ceca well-developed, with conpicuous lateral protrudings. Testes in irregular shape, right testis 0.20-0.33*0.21-0.29 left testis 0.24-0.34*0.21-0.23. Ovary with 2-3 notches,m 0.17-0.24*0.16 0.21. Vitellaria glands branched, 6-7 branches, left gland 0.25-0.37*0.16-0.17, right gland 0.26-0.41*0.13-0.22. Genital pore dorsally opened, 0.10-0.13*0.084-0.11. Egg 0.035-0.048*0.026-0.033.This species with conical spine on the surface and well developed ceca distin-guishes itself from all of six known species of sub-genus Vittellarinus. The other differences from similar species Ph.(V.)conostomum(Olsson,1876)and Ph.(V,)elongatum Nybeline, 1926 are in:oral sucker bigger than acetabulum,the testis only half as big as that of Ph.(V.)conostomum, in spite of their similarity in body size;testes, ovary,vitellaria glands near with each other,occupied one-fifth middle part of body.
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