中国海水鱼类单殖吸虫研究Ⅻ新海盘虫属一新种及海盘虫属一新记录

MONOGENOIDEA OF CHINESE MARINE FISH Ⅻ .ONE NEW SPECIES OF GENUS NEOHALIOTREMA FROM ABUDEFDUF SP. AND ONE NEW RECORD OF GENUS HALIOTREMA FROM CROMILEPTES ALTIVELIS

报道了寄生于豆娘Abudefdufsp .鳃上的新海盘虫属一新种和寄生于驼背鲈Cromileptesaltivelis鳃上的海盘虫属一新记录。双曲片新海盘虫 ,新种Neohaliotremadi curvilamellatum ,sp .nov .与NeohaliotremabychowskiiZhukov ,1 976相似 ,但支持器的形态结构不同和交接管量度上有差异。驼背鲈海盘虫HaliotremacromileptisYoung ,1 968与原始描述相比 ,除交接管稍长外 ,其它量度与形态基本一致。

One new species of Neohaliotrema Yamaguti (1965) and one new record of Haliotrema Johnston & Tiegs (1922) are described. Type specimens are deposited in the Department of Biology,South China Normal University.All measurements are in millimeter. 1. Neohaliotrema dicurvilamellatum sp.nov.(Fig.1) Type specimens No.:holotype Gdgz970604-1,paratype Gdgz970604 2—6 Host:Abudefduf sp. Location:gills Locality:Sanya,Hainan (18 25°N,109 5°E) Date:June 4,1997 Body of medium size,(0 23—0 31)×(0 036—0 045) Opisthohaptor (0 062—0 086)×(0 102—0 116) in size Dorsal central large anchors 0 042—0 053 in total length,basal portion 0 028—0 035,inner root 0 012—0 017,outer root 0 006—0 009,point portion 0 007—0 009. Ventral central large anchors 0 045—0 053 in total length,basal portion 0 027—0 038,inner root 0 012—0 019,outer root 0 006—0 009,point portion 0 007—0 009. Dorsal connective plate (0 049—0 065)×(0 003—0 005)in size,ventral connective plate (0 051—0 060)×(0 003—0 004).There are two types of marginal hooklets,among of which three pairs are wide and long,0 042—0 061 in total length;four pairs are slender and small,0 013—0 016 in total length. Copulatory tube 0 012—0 019 in total length,supporting apparatus 0 010—0 013 in length according to its curvature,“6” shaped curved. Description is based on 6 specimens. Remark:this worm is similar to Neohaliotrema bychowskii Zhukov (1976),but differs from the latter in the dimensions of cupulatory tube and the structure of supporting apparatus. 2.Haliotrema cromileptis Young (1968) (Fig.2) Host:Cromileptes alitivelis Location:gills Locality:Sanya,Hainan (18 25°N,109 5°E) Date:January 20,1998 Body of medium size,(0 702—0 819)×(0 099—0 215) Opisthohaptor (0 083—0 208)×(0 104—0 156) in size. Ventral central large anchors 0 070—0 078 in total length,basal portion 0 044—0 049,point portion 0 018—0 026,inner root 0 029—0 034,outer root 0 005—0 009. Dorsal central large anchors 0 065—0 068 in total length, basal portion 0 036—0 049,point portion 0 016—0 018,inner root 0 021—0 031,outer root 0 004—0 006 Ventral connective plate (0 049—0 062)×(0 010—0 016) in size,dorsal connective plate (0 049—0 056)×0 010 in size. Marginal hooklets 0 010—0 016 in length. There is no supporting apparatus. Copulatory tube is slender, 0 169—0 208 in length. There is a polar filament in the egg,egg except for polar filament 0 088×0 065 in size,polar filament 0 091 in length. Description is based on 10 specimens. The shape and all dimensions of this worm basically agree with original description except that the length of copulatory tube is slightly long.