中国蚌螨属支序分类分析(蜱螨亚纲:蚌螨科)

选择35个特征对我国蚌螨属15种的支序分析结果表明:蚌螨P-Ⅳ(胫节)端腹部的指状突是将它们聚集成两群的主要特征.今村蚌螨P-Ⅳ端腹部仅具有短矩,与外群最近,认为是我国的蚌螨属水螨中最原始的种类;雌螨前殖吸盘板的形态影响戊蚌螨亚属与多盘蚌螨亚属的种类聚类,由此推测可以将蚌螨P-Ⅳ端腹部的指状突与雌螨前殖吸盘板的形态也作为蚌螨亚属的区分特征.由于殖吸盘结构简单是祖征态之一,因此认为具有5对殖吸盘的邻近蚌螨比6对殖吸盘的厚蚌螨更原始.雌螨具有1对殖吸盘板的寄蚌螨亚属种类与沃蚌螨亚属种类在支序系统树中形成姊妹群,结果支持Vidrine 将沃蚌螨亚属从寄蚌螨亚属中分离的修订.

Cladistic Analysis on the Genus Unionicola (Acari: Unionicolidae) from China

Thirty-five characters were chosen for the cladistic analysis on 15 known species of the genus Unionicola from China.The results indicated that the unionicolid mites were assembled into two groups by the ventral finger-tubercle of P-Ⅳ.U.imamurai appeared to be the most ancestral species with short spur of P-Ⅳ which is similar to the outgroup.The morphology of anterior acetabular plates of females impacted congregation on those species in the subgenus Pentatax and Polyatax.Thereout,it was supposed that the ventral finger-tubercle of P-Ⅳ and anterior acetabular plates of females may also be used as discriminative characters of the subgenus in the Unionicola.The simple structure of acetabula is one of plesiomorphic characters,so it appeared that U.affinis with five pairs of acetabula was much more primitive than U.crassipes with six pairs of acetabula.The female water mites with a pair of acetabular plates of the subgenus Parasitatax and Wolcottatax was sister group together.The results supported Vidrine's revision for the subgenus Parasitatax that Wolcottatax was divorced from the subgenus Parasitatax.