江西省纤恙螨属二新种(蜱螨亚纲:恙螨科)

TWO NEW SPECIES OF THE GENUS LEPTOTROMBIDIUM FROM JIANGXI, CHINA (ACARI: TROMBICULIDAE)

本文报道采自江西省武功山和庐山地区的纤恙螨属二新种:武功纤恙螨Lepfotrombidium (L.)wugongensis和庐山纤恙螨Leptotrombidium(L.)lushaneusis,并对该新种的形态特征作了详细描述,与近似种湖北纤恙螨 Leptatrombidium(L.)hupeca(Ma et Hsu)1965和曲靖纤恙螨Leptotrombidium(L.)quiingensis(Yu et al.)1981进行了分析比较。

This paper describes two new species of chigger mite from Jiangxi, China.1. Leptotrombidium (Leptotrombidium) wugongensis sp. nov.(figs. 1-5)Body white when alive, oval. Unengorged larvae 206-285×160-206μm; engorged larvae 701×584μm. Galeal setae plumose. Palpal setae formula N-N-B-N-B/7B. Palpal claw trifur-cate. Scutum nearly retangular in shape, with few punctae on its surface, PW/SD = 2, SB behind the PLs line, PL>>AM>AL. Sensillae filimentous, with 6-8 branches on distal 2/3 and nude on base 1/3. Standard measurements (in μm) given in table Dorsal setae 35-40, arranged as 2-8-6-6-6-4-2-2. Ventral setae 40-46. Sternal setae 2/2. Coxal setae 1-1-1. Legs: Ⅰ 240-256; Ⅱ 223-240; Ⅲ 244-272 urn. JP:738-758 (746). SIF = 7B-B-3-2111.0000.Holotype and 6 paratypes were collected off the ear of Eutamias sibiricus, in August 1981, from Wugongshan maintains, Jiangxi Province.This new species is similar to Leptotrombidium (L.) hupeca Ma et Hsu, 1965, but differs in the body setae more in number and the different arrangement of dorsal setae, the shape of scutum, SB behind the PLs line, PL>>AM>AL and the number of IP.2. Leptotrombidium(Leptotrombidium) lushanensls sp. nov. (figs. 6-10)Body oval in shape. Idiosoma 377-403×264-307μm. Galeal setae plumose. Palpal setae formula N-N-B-N-N-/7B. Palpal claw trifurcate. Scutum samewhat retangular, PW/SD =1.8. SB before the leval of PLs, PL>>AM>AL, AP>PS. Sensillae filiform, without barbs at its base. Standard measurements (in urn) given in table. Dorsal setae 31-37, arranged as 2-8-8-6-6-3-2. Ventral setae 30-38. Sternal setae 2/2. Coxal setae 1-1-1. Legs: Ⅰ 219-282; Ⅱ 203-277; Ⅲ 224-280 μm. IP:646-784(707). SIF = 7B-B-3-2111.0000.Holotype and 3 paratypes were collected off anus of the Apodemus agrarius, in August 1978, from Lushan maintains, Jiangxi Frovince.This new species is closely similar to Leptotrombidium (L. ) qujingensis Yu et al., 1981, but differs in the body setae less in number and their different formula of dorsal setae, the shape of scutum and the scutal anterior and posterior margin, less of distal branches of the sen-sillae.