摘要
方钧戴箭蜒Davidius squarrosus,新种(图1-7) 雄:体长44mm,腹部33mm,后翅30mm。体黑色,头、胸及腹部的浅色区均呈黄色。 头部:上唇的亚端部镶有1条细弱的黄纹,前唇基污黄色,上颚基部外露部分及上额均鲜黄色。胸部:前胸的前区黄色,中区的侧面有1小黄斑;合胸(图1)的领条纹中断,背条纹略向下分歧,其下端与领条纹的外侧端接合,形成7状纹,有或缺唇前上点,胸侧黄色,第2条纹残留抵及气门前缘的下段,第3条纹完整;翅透明。
Davidius squarrosus Zhu, sp. nov. (Figs. 1-7)Holotype (?) , Yuanba, Shaanxi, 1985-Ⅵ-25, Collecbed by Yang Zude; allotype (?); paratype 1 (?), same data as holotype.Male and female: Total length 44mm , abdominal length 33mm, hind wing length 30mm. This new species can be distinguished from the close species D. trox Needham bythe characters below: Male: 1) ante-and post-nodal cross veins being and respectively; 2) the two branches of anterior hamule equal in length andthe posterior hamule broadly expanded as shown in fig.5; 3) segment 9, 10 and anal appendages black and unmarked; 4) the relative lengths of segment 7, 8, 9, 10 and anal appendages represented as 10 : 7 : 4 : 3.5 : 3. Female: 1) ante-and post-nodal crossveins are 2) segments 9, 10 and anal appendages black andunmarked; 3) the relative lengths of segments 7, 8, 9, 10 and anal appendages represented as 10 : 7 : 3 :1.3 : 1.2; 4) vulvar scale is prolonged to four fifths the length of the 9th sternite.The type specimens are deposited in the Insect Collections of Biology Department, Hanzhong Teachers' College, Shaanxi Province, China.
关键词
箭蜓科
戴箭蜓属
新种
Odonata, gomphidae, Davidius, New Species.
