新囊螨雄螨和云囊螨成螨前各期描述(蜱螨亚纲:中气门目:胭螨科)

Descriptions on male of Asca nova and immature stages of Asca nubes(Acari: Mesostigmata: Rhodacaridae)

描述新囊螨(Asca novaW illm ann,1939)雄螨和云囊螨(Asca nubesIsh ikawa,1969)成螨前各期。

Male of Asca nova Willmann, 1939 and immature stages of Asca nubes Ishikawa, 1969 are described in the present paper. 1 Asca nova Willmann, 1939 （Fig. 1） Mail：Body yellow, oval, length 276 -280 μm, width 172 - 176μm. Dorsum covered by two shields. Anterior dorsal shield with 17 pairs of setae, short and simple; posterior dorsal shield with 15 pairs of setae, 2 pairs of which on postero-lateral projections, D5, D6 and D7 short, D8 longer, S8 minute. Sterno-genital shield with 5 pairs of setae, ventro-anal shield with 8 pairs of setae except perianal setae, last 2 pairs longer. Ad situated at level of middle of anus, shorter than anus, PA distinctly longer than Ad. Peritreme reaching to base of F1anteriorly. Tectum 3-tined. Spermatodactyl of chela club-shaped. Legs setae simple. Specimens 7 9 2 and 2 i5 i5 , ex leaves litter, from Songshan Mountain（34°55＇N, 113°05＇E）, Henan Province, in 17 July 2002. 2 Asca nubes lshikawa, 1969 （Figs.2, 3） Deutonymph： Body light yellow, oval, length 276-287 μm, width 195 -218μm. Dorsal setae about 42 pairs, postero-lateral projections with 1 pilose seta respectively. Venter with about 15 pairs of setae except perianal setae. Ad situated before level of posterior margin of anus and subequal to anus in length, PA longer than Ad. Peritreme beyond anterior margin of coax I anteriorly. Movable digit of chela bidentate, fixed digit with several small dentieles. Protonymph ： Body white. Dorsal setae about 28 pairs, of which 1 pair on postero-lateral projections pilose, remains simple. Venter with 3 pairs of sternal shield, about 4 pairs of ventral setae and 3 perianal setae. Ad situated at level of middle of anus, slightly longer than anus, PA longer than Ad. Peritreme short. Larva： Body white. Dorsal setae about 19 pairs, simple; postero-lateral projections without seta, around the projection with 3 long setae. Venter with 3 pairs of sternal setae, about 4 pairs of ventral setae and 3 perianal setae. Ad situated behind level of middle of anus, both Ad and PA longer than anus. Stigma and peritreme absent. Legs 3 pairs. Specimens 8 9 9 , 2 deutonymphs, 2 protonymphs and 2 larvae, ex forest litter and bark of tree, from Lushi County （34°N, 111°E） , Henan Province, in 21 July 2001.