A Preliminary Study on the Genus Caenis (Ephemeroptera: Caenidae) from Chinese Mainland, with Description of a New Species

我国大陆细蜉属Caenis 修订及一新种描述 (蜉蝣目:细蜉科)(英文)

Five species of the genus Caenis from Chinese mainland are reviewed. Among them, C. parviforcipis (Zhou et al.) (nov. comb.) is transferred from the genus Brachycercus The larvae of the C. sinensis Gui et al. are described for the first time. The previously reported C. nigroforceps Zhou et al. is recognized as a new synonym of the Caenis rivulorum Eaton, and the report of C. nigropunctata Klapálek from China is confirmed. Both imagos and larvae of a new species C. melanoleuca, sp. nov. are described and illustrated in detail.

我国大陆细蜉属Caenis 共知5种,其中短铗细蜉Caenis parviforcipis (Zhou et al.), n. comb. 由短尾蜉属Brachycercus 转移而来;中华细蜉Caenis sinensis Gui et al. 稚虫形态在本文中首次描述;另外从标本来看,已知的黑铗细蜉Caenis nigroforceps Zhou et al. 实际为近岸细蜉Caenis rivulorum Eaton 的新异名;本文描述1新种:花斑细蜉Caenis melanoleuca,sp. nov.; 第5种黑点细蜉Caenis nigropunctata Klapalek 也根据标本得到了确认。文中还给出了以上5种成虫和4种稚虫的检索表。所有标本都保存在南京师范大学生命科学学院。 花斑细蜉Caenis melanoleuca,新种(图5,7,12) 正模:♂,贵州惠水县摆金镇附近河中,2000-Ⅸ-10,李传仁,周长发采;副模:100♂♂5♀♀20稚虫,同正模;30♂♂,贵州贵定县昌明镇附近河中,2000-Ⅸ-08,李传仁,周长发采。 新种成虫的尾铗呈独特的扁平状且强烈弯曲,稚虫身体呈明显黑白相间的条纹状且个体较大,极易识别。