海水鱼瘤槽科钩槽属绦虫两新种记述

Two New Species of Acanthouothrium Cestodes

报告厦门海域鱼类四叶目瘤槽科绦虫两个新种：尖嘴钩槽绦虫和厦门钩槽绦虫。前者宿主为尖嘴，后者宿主为及达尖犁头鳐。

Two new species of cestodes(Tetraphyllidea:Onchobothriidae),fromsaltwater fishes in Xiamen,South Fujian,China are reported.The results follow:(Measure- ments are in microns unless otherwise indicated.)1.Acanthobothrium zugeinensis sp. nov. Figs. 1～5. Acraspedote,length 140～160 mm,width 1. 989 mm with 231～286 segments. Scolex2.601×2.506 mm with 4 bothridia. Bothridia 664～688×556～581 with 3 loculuses eachone. Each phyllidia with an accessory sucker(99～103)and one pair of hook. All hooks aretwo-pronged.Inner prong 17～20;outer prong 20～25;total hook length,68～75.Maturesegments 1.085～1.465×1.326～1.795 mm. Cirrus uriarmed.Genital pore alterately openedat posterior to the mid-marginal of segment.Testes 106 to 132 in number. Ovary lobed,902～985×213～236 in size. From the intestine of sealchian,Dasyatis zugei(Dasyatidae). 2.Acanthobothrium xiamenensis sp.nov. Figs. 6～10. Craspedote,strobila 140～160 mm in length,1.9～2.5 mm in width,with 172～252 seg-ments,Scolex 3.2～7.5×4.4～6.2 mm with 4 bothridia.Bothridia 3.07～3.39 × 2.04～2.21 mm(3.21 ×2. 14 mm),with 3 loculus per bothridium.One accessory sucker per bothridi-um,357～393 ×393～464(366 ×428)in diameter. In each of bothridium has one pair ofhooks. All hooks are two-pronged.Hook handle 26～35(30);inner prong,31～44(38),outerprong,31～35(33),total hook length,66～71(68).Mature segments 0.644～0. 857×1. 316～2.203 mm.Testes 62～84 in number. Cirrus unarmed.Ovary 695～848 ×90～94. Genitalpore alternated irregularly on the mid-margin of segments. Vitelline glands vacuolated,dis-tributing in the lateral portion of segments. Gravid uterus sac-like, with lateral lobes. Fromthe intestine of selachian,Rhynchobatus djidensis(Rhynchobatidae).