摘要
记述虫穴螨属２新种：小兴安岭虫穴螨 Ｚｅｒｃｏｎ ｘｉａｏｘｉｎｇａｎｌｉｎｇｅｎｓｉｓ， ｓｐ． ｎｏｖ． 和黑龙江虫穴螨 Ｚｅｒｃｏｎ ｈｅｉｌｏｎｇｊｉａｎｇｅｎｓｉｓ， ｓｐ． ｎｏｖ．。
Zercon xiaoxinganlingensis, sp. nov. (Figs. 1～13) ♂. Length and width 391-414×310-345 (av. 402×325) μm. Two dorsal shields with cloud like and scale like sculptures. Dorsal cavities distinct and well sclerotized, with axes parallel to body axis. Dorsal chaetotaxy entire. Setae i1-i3, s3-s6, r1-r6, J6, Z3-Z4, S1-S4 and R1-R7 feathered, remaining setae smooth; r1-r2 slightly shorter and r3 slightly longer than other marginal setae; s1-s2 shorter than the others of single row; z2 shorter than nearby setae. Lengths of setae and distances between setae of single rows on posterior dorsal shield shown in formulae of dorsal setae 1. Po2 situated postero lateral to Z2, Po3 situated interior to line connecting Z3 and Z4, near to Z4. Sterno genital shield with 5 pairs of setae, genital opening situated at level of coxae III. Adgenital shields one pair. Peritrematal shield broad, seta P1 short and smooth, P2 long and feathered. Peritreme arc shaped, reaching to level of anterior part of coxae III. Ventro anal shield large, bearing 7 pairs of preanal setae and 3 perianal setae. Tectum shown in Fig. 6. Movable digit of chela with 3 teeth, fixed digit with 4 or 5 teeth. ♀. Length and width 460-540×425-471 (av. 506×441) μm. Dorsum as in male. Lengths of setae and distances between setae of single rows on posterior dorsal shield shown in formulae of dorsal setae 2. Sternal shield aquare, posterior margin slightly concave, with 3 pairs of setae. Metasternal setae on cuticle interior to endopodalia. Genital shield with one pair of setae. Ventro anal shield large, with 7 or 8 pairs of preanal setae, of which 1 or 2 pairs at anterior margin of the shield. The new species very similar to Zercon amidrytus Blaszak, 1978 and Zercon amphibolus Blaszak, 1978, but in the new species pore Po3 situated interior to line connecting Z3 and Z4, however in Zercon amidrytus Po3 situated on line connecting Z3 and Z4, in Zercon amphibolus Po3 situated interior to Z4. Holotype ♂, paratypes 9♂♂, 10♀♀
