新亚种—中华拟同形溞(Daphnia similoides sinensis)

A new subspecies of Daphnia:Daphnia similoides sinensis

记述了一种溞属新亚种:中华拟同形溞Daphnia similoides sinensis,模式标本保存在暨南大学水生生物研究所。在蒋樊治先生的《淡水枝角类》等中国文献中,该种被描述为隆腺溞,直至最近几年才陆续有中国学者报道了中国的拟同形溞,并有较多有关该种的生物学与生态学研究,但一直未见其形态学的研究结果。除此之外,仅台湾学者YOUNG Shuh-Sen公布了台湾的拟同形溞的COI序列。中华拟同形溞与已知印度的Daphnia similoides主要区别在于其雄性第一触角上的嗅毛较短、鞭毛分节不同,鉴于雄性第一触角在分类学上的重要性,将其划分为新亚种。该亚种的COI基因序列与已知台湾的D.similoides有99%的相似度。比较了广东、安徽、浙江和江苏等地的D.similoides种群,它们仅在第一触角处有细微差别。

A new subspecies of Daphnia： Daphnia similoides sinensis was recorded. The type was deposited in the Institute of Hydrobiology of Jinan University, Guangzhou, China. This subspecies was described as Daphnia carinata in China. Recently, papers about the biology and ecology of Daphnia similoides, but not about morphology, were published. The Daphnia similoides sinensis showed 99% similarity in COl gene to Daphnia similoides that was published from Taiwan, but they were significantly different in male antennule. D. similoides sinensis had a shorter aesthetase and different separation of flagellum, and the different shape of female postabdomen as well. The four local specimens of this subspecies collected from Guangdong, Anhui, Zhejiang and Jiangsu Province, were compared morphologically, and no taxonomically difference was found.