大裸头绦虫(Anoplocephala magna)形态描述

Description on the Morphology of Donkey Cestode Anoplocephala magna from Ningxia, P. R. China

报道了宁夏回族自治区驴体内的一种裸头科绦虫：大裸头绦虫（Ａｎｏｐｌｏｃｅｐｈａｌａｍａｇｎａ）的形态，标本通过仔细地观察绘图，并作了较详尽的形态学描述．虫体２０５．６×２３．５ｍｍ，３４８节，头节仅具四个吸盘．体节全部宽大于长，生殖器官一套．睾丸数３８７～４６３个．卵巢麦穗状，分不对称的两翼横跨体节后缘．卵黄腺扁平团块状，位于卵巢后方．子宫细长横管状．阴道位于阴茎囊后方．生殖孔单侧开口于体节侧缘近中部．孕节子宫囊袋状，虫卵具梨状器．

This paper describes the morphology of Anoplocephala magna from donkey in Ningxia, North China. This worm measured 205.6 mm in length and 23.5 mm in width. All proglottids are wider than long, craspedote, with a single set of reproductive organ per segment.Genital apertures unilateral. Scolex 7.0×7.5 mm in size with four suckers, unarmed. The sucker 1.910～2.064×2.000～2.064 mm. Mature segments 0.516～0.774×11.094～14.964 mm. Testes 387～463 in number and 0.086～0.103 mm in diameter, scattered through the medulla width. Ovary 6.644～7.095×0.155～0.413 mm in size,with marked poral and antiporal wings, filling nearly the whole medullary width, poral wings 2.129～2.193×0.155～0.294 mm, and antiporal ones 4.515 ～ 4.902 × 0.155 ～ 0.413 mm. Vitellaria in median ventral medulla posterior to ovary,1.032～1.548 × 0.181～0.194 mm in size.Receptaculum seminis large, 1.032～1.161×0.387～0.452 mm in size. Vagina opening ventral to cirrus pouch. Early uterus transversal duct like in shape. Gravid uterus sac like in shape, filling with numerous mature eggs. Adult in donkey.