鱼类复殖吸虫三新种记述

鱼类复殖吸虫三新种记述冯伟，王伟俊（中国科学院水生生物研究所，武汉４３００７２）关键词复殖吸虫新种，牛首科，同盘科，发状科，鱼类寄生吸虫作者在整理鱼类寄生复殖吸虫中，发现有３个分属于牛首科、同盘科和发状科的种类，经鉴定为新种，现分别描述如后。模式标本...

DESCRIPTIONS ON THEREE NEW DIGENETIC SPECIES OF FISHES

hree new digenetic species belonging to Bucephalidae Poch0,1907,Paramphis-tomidae Fischoeder, 1 90 1 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,Ins-titute 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 x 0.25 0.53. Anterior sucker0.047 0.090 x 0.043 0.076. Intestine saccular 0.82 0.21 x 0.054 0.088. Two tes-tes tandem laterally in posterior 3/4 of body, anterior testis 0.071 0.18 x 0.095 0.18, posterior testis 0.086 0.18 x 0.071 0.22. Cirrus pouch 0.18 0.40 x 0.056 0094, vesicula seminals 0.076 0.17 x 0.043 0.065. Ovary 0.65 0.19 x 0.65 0.16.Vitellaria forming two lateral or middle groups of 1 5 16 follicles each above ovary.Egg ellipsoid,0.020 0.032 x 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; suc-ker,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 Bodv 2.30 5.87 x 0.76 1.38. Oral sucker with large diverticles oral sucker 0.30 0.59 x0.30 0.56, diverticle 0.15 0.26 x 0.13 0.25. Esophageal bulb 0.13 0.30x 0.12 0.17. Acetabulum 0.48 0.89 x 0.52 1.01. Testes with irregular inci- sions, anterior testis 0.39 0.63 x 0.36 0.69, posterior testis 0.39 0.61 x 0.31 0.72.Cirrus pouch 0.17 0.39 x0.12 0.19, genital pore befurcal. Ovary nearly rounded,0.14 0.30 x0.16 0.28. Egg 0.076 0.12 x 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 x 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 678x 1.28 1.80.Oral sucker 0.36 0.46 x 0.37 0.46, acetabulum 0.32 0.40 x 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 0.33x0.21 0.29 left testis 0.24 0.34 x 0.21 0.23. Ovarv with 2 3 notches,m 0.17 0.24x0.16 0.21.Vitellaria glands branched,6 7 branches,left gland 0.25 0.37x0.16 0.17,right gland 0.26 0.41 x 0.13 0.22.Genital pore dorsally opened, 0.10 0.13 x 0084 0.11. Egg 0.035 0.048 x 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.