我国顶头甲螨属一新亚属一新种记述(蜱螨亚纲:甲螨亚目:耳头甲螨科)

A NEW SUBGENUS AND SPECIES OF ACROTOCEPHEUS FROM SICHUAN, CHINA (ACARI: ORIBATIDA: OTOCEOHEIDAE)

在四川省峨嵋山土壤中采得一种顶头甲螨,经鉴定系未曾记述过的新种,并为其建立新亚属,以其生殖板具有6对毛特征而命名为:六毛头甲螨亚属Hexatocepheus subg.nov.新种为峨嵋顶头甲螨Acrotocepheus(H.)emeiensis sp.nov.

Subgenus Hexatocepheus subg. nov.The new subgenus is readily separable from the type-subgenus Acrotocepheus by the following unique characters: L/W of body 1. 8-2. 0: interspace between co. nl 3. 1-3. 3: opp markedly developed, among which the innermost one being extended far anteread; 6 pairs of genital setae. Type-species Acrotocepheus (Hexatocepheus) emeiensis sp. nov.Acrotocepheus (Hexatocepheus) emeiensis sp. nov. (Figs. 1-6)Body length 1104(1210) 1330μm. width 548 (632) 688μm. The new species differs from Acrotocepheus species by the numbers of genital setae. Material examined: Holotype and 4 paratypes (88-1211). Qingyinge of Mt. Emeishan (29. 6@N, 103. 4°E) Sichuan, 22. Ⅵ. 1988.