纤恙螨属一新种(真螨目:恙螨科)

A NEW MITE OF THE GENUS LEPTOT ROMBIDIUM (ACARIFORMES: TROMBICULIDAE)

本文报道1983年采自吉林省和龙县棕背(鼠平) Clethrionomys rufocanus 体上的一种新恙螨,棕(鼠平)纤恙螨 Leptotrombidium rufoconum sp.nov,模式标本分别存放福建医学院寄生虫学教研室和沈阳军区后勤部军事医学研究所。

Leptotrombidium (L.) rufocanum sp. nov. (figs 1-4)Body ovate. Length 362-537 μm, width 286-435 μm, fp = N-N-BNN/7B. Galeal setae nude. Palpal claw with 3-prongs. Scutum tetragonal, with biconvex posterior margin. Sen-silla filiform, with bare basal portion, terminal 2/3 with 11-13 minute branches. Dorsal setae 38-47 in number, arranged as 2-10(9-12)-8(8-ll)-8(7-10)-6(8-6)-4(4-2)-2. The measurements of holotype: AW 89 PW 97 SB 40 ASB 28 PSB 19 SD 47 AP 26 AM 64 AL 43 PL 66 S 75. Leg Ⅰ 298-308 μm, Ⅱ 266-277 μm, Ⅲ 307-311 μm, Ip = 871-896.Holotype and 10 paratypes collected off Clethrionomys rufocanus from Huolong County, Jilin Province on August 11, 1985. Holotype and 5 paratypes deposited in the Department of Parasitology, Fujian Medical College, another 5 paratypes deposited in Army Military Medical Research Institute, Shenyang, PLA, China.This new species is similiar to L. burnsi, L. tosai, L. rupestre and L. intermedium, but differs from L. burnsi and L. tosal by larger AW, PW and SB, with more NDV than L. tosai, with less DS than L. rupestre, with biconvex posteior margin which differs from L. intermedium. The differences between those mites are shown in table.