双雄性交配器官大口涡虫的首次发现  

The First Discovery of Macrostomum spp. with Duplicated Male Copulatory Organs

作　　者：王磊[1] 林逸涛 辛帆 冯伟涛[1] 汪安泰[1] 

机构地区：[1]深圳大学生命与海洋科学学院、深圳市海洋生物资源与生态环境重点实验室,深圳518060

出　　处：《动物学杂志》2017年第3期423-430,共8页Chinese Journal of Zoology

基　　金：广东省“大学生创新创业训练计划”项目(No.201710590041,201710590043);2017年广东省大学生科技创新培育专项资金(攀登计划)项目(No.pdjh2017a0429)

摘　　要：大口涡虫属所有物种均为雌雄同体,具一套交配器官。作者于2015年在广东省的两处淡水环境,首次发现2个具有双雄性交配器官的大口涡虫(Macrostomum sp.)标本。通过对活体、整装片、连续组织切片的显微镜观测,发现2只标本的两套交配器官呈左右排列;每套交配器官具备完整的假储精囊、储精囊、颗粒囊与交配刺;假储精囊与储精囊内具有精子;雄孔分别为1个与2个;交配刺的结构与中国已经记录的物种都不相同。本研究对其做了较为详细的描述,并初步探讨了大口涡虫多交配器官发生的原因。All the species of Macrostomum are hermaphrodite and have only one set of male copulatory organs. In this study, the authors found two specimens of Macrostomum（deformed Macrostomum sp. 1 and deformed Macrostomum sp. 2） which have duplicated male copulatory organs in the freshwater environment for the first time in Guangdong Province in 2015. With the observation of living bodies, dyed specimen and whole body sections（Fig. 1, Fig. 2）, we found that their two sets of copulatory organs arrange in a left-to right-hand sequence. Each set of copulatory organs has an intact false vesicula seminalis, vesicula seminalis, vesicula granulorum and penis stylet. The false vesicula seminalis and vesicula seminalis contain numerous spermatozoa. And they have one and two male gonopores, respectively. In addition, these four penis stylets′ structures are different from those of the species of Macrostomum that have been recorded in China. In this paper, morphology of these two specimens are described in details（Table 1） and the reasons why these phenomena happened are briefly discussed.

关 键 词：涡虫 大口涡虫属 交配器官 畸形 形态学 

分 类 号：Q959[生物学—动物学]