窄口螺侧殖吸虫的发育史及早熟现象  

PROGENETIC DEVELOPMENT OF ASYMPHYLODORA STENOTHYRAE N.SP.

作　　者：唐仲璋[1] 

机构地区：[1]厦门大学生物系寄生动物研究室

出　　处：《水生生物学集刊》1980年第2期231-244,共14页

摘　　要：1.本文描述从福州闽江泥滩采集的图氏窄口螺体中发现一新种侧殖吸虫,定名为窄口螺侧殖吸虫(Asymphylodora stenothyrae sp.nov.)并与其他相近虫种作详细比较。2.窄口螺侧殖吸虫的生活史各期发育经详细观察,本文简单介绍其各发育期形态特征。3.本文对窄口螺侧殖吸虫早熟现象及其他吸虫类的提早发育现象进行讨论,并将复殖吸虫亚纲曾经发现有提早发育现象的虫种及其中间宿主列表比较。我们的结论:早熟现象在吸虫类中是相当普遍的一种现象。Three species of progenetic trematodes were described to belong to the genus Asym- phylodora Looss, 1899 by helminthologists. They are A. progenetica Serkova and Byk- howsky, 1940, A. dollfusi Biguet, Deblock and Capron, 1956, and A. amnicolae Stunkard, 1959. In this paper is reported the fourth of such examples of a digenetic trematode, which grows to maturity within a single molluscan host. The gastropod parasitised is Stenothyra toucheana Heude, inhabiting the Min River delta and its tributaries. Having compared the morphological features of the adult and larval stages with above-men- tioned three species as well as other species of the genus as described by previous workers, the author considers the present species to be new to science and the name A. stenothyrae sp. nov. is given. The worms are spindle-shaped, wider near the middle and narrower toward both ends. The total body length is 0.715-0.963 mm and body width 0.360-0.457 mm. The oral sucker is subterminal, 0.072-0.132 mm in diameter. It is followed by the pharynx 0.042-0.057 mm in transverse and vertical diameter. The esophagus is of considerable length. It bifurcates into two intestinal caeca, surrounding the acetabulum and extend- ing posteriorly to about one third of the body length. The acetabulum measures 0.137- 0.192 mm in diameter. A single testis is present. It is oval in shape, measuring 0.090- 0.154 mm and 0.064-0.094 mm in longitudinal and transverse diameter. Two vas effe- rens originate from its anterior part and run anteriorward to near the posterior edge of the acetabulum, where they unite together forming a vasa deferentia entering the cirrus pouch. The latter contains a bipartite seminal vesicle and a long cirrus. The ovary is pyriform and curved. The posterior proximal portion of the ovary, which bends an- teriorly giving rise to an ovidu

关 键 词：窄口螺侧殖吸虫 发育史 早熟现象 形态特征 淡水鱼 寄生虫 

分 类 号：S943.1[农业科学—水产养殖] S941.52[农业科学—水产科学]