【摘要】 <正> 本文记述从云南省啮齿动物体上采到的恙螨6新种,包括纤恙螨属(Leptotrombidium Nagayo et al.,1916)5新种,瓦切恙螨属(Walchiella Fuller,1952)1新种。全部正模和副模标本均保存于云南省流行病防治研究所。 贡山纤恙螨Leptolrombidium(Leptotrombidium) gongshanensis,新种(图1:1—5) 鉴别特征 本新种与地里纤恙螨L.(L.)deliensis(Walch,1922)较近似。其主要区别是:本新种AW、PW较大,PW/SD=1.94;AM>PL>>AL,感器长,且位于后侧毛基部间线上或略后,盾板毛、背腹毛及螯肢爪均较长。更多还原

【Abstract】 The present report deals with six new species of chigger mites parasitic on rodents from Yunnan Province, China.The type specimens are deposited in the Control and Research Institute of Epidemic Diseases of Yunnan Province.The diagnostic characters of the six new species are given as follows.Leptotrombidium (Leptotrombdium) gongshanensis, sp.nov (figs.1:1-5)Body orange red when alive, elongated oval, engorged larvae 405-435X 328 -370u, unengorged larvae 260-355X203-298 u . Cheliceral blade 35-38 u long. Galeal setae plumose, with 7-9 barbs, palpal formula N-N-BNN, palpal tarsal setae 7B, palpal claws 3-forked. Shape of scutum as indicated in the figure, AM>PL>AL. SB behind line of PLs. Sensillae filamentous, with 11 -13 long branches on distal 2/3, proximal 1/3 nude. Eyes 2 + 2 on ocular plates. Dorsal setae 28-30 in number, arranged 2-8-6-6-4-2-0 (2) . Sternal setae 2 pairs, ventral setae 22-25 in number.All legs 7-segmented, with specialized setae as figured. Standard measurements (average): AW = 68, PW = 76, SB = 32, ASB = 26, PSB=13, SD = 39,AP = 23, AM = 68, AL = 40, PL = 62, Sn = 81, HS = 58, DS = 55-44, VS = 38-44, Ip = 704u.Holotype and 7 paratypes collected from Eothenomys miletus in April 1979, from Yunnan Province.This new species is allied to L.(L.) deliensii (Walch, 1922), but differs in. ( 1 ) scutum about twice broad than long, ( 2 ) AM>PL>AL, ( 3 ) scnsillac longer, SB about in line of PLs, (4) with longer cheliceral blade and scutal setae and dorsal setae.Leptotrombidium(Leptotrombidium)cangjiangensis, sp.nov. (figs.2:1-5)Body orange red when alive, partly engorged larva 345 x 250 u, unengorged larvae 260-347 x 172-213 u . Cheliceral blade 31-33 u long. Galeal setae plumose, with 10-13 barbs. palpal formula N-N-BNN, palpal tarsal setae 7B, palpal claws 3-forked. Shape of scutum as indicated in the figure. PL>AM> AL. Sb behind line of PLs. Sensillae filamentous, with 17-18 long branches on distal 3/5, proximal 2/5 with minute barbs. Eyes 2 + 2 on ocular plate. . Dorsal setae 28-29 in number, arranged 2-8 (9)-6-6-4-2. Sternal setae 2 pairs, Ventral setae 28-31 in numder. Legs all 7-segmented, with specialized setae as figured.Standard measurements (average). AW = 59, PW = 64, SB = 25, ASB = 22, PSB=13, SD = 35, AP=17, AM = 35, AL = 32, PL = 44, Sn = 55, HS = 48, DS = 48-34, VS = 28-36, Ip = 706u.Holotype and 3 paratypes collected from Rattus rattus sladeni in April 1979, from Yunnan Province.This new species is allied to L. (L.) yu (Chen & Hsu, 1955), but differs in. ( 1 ) with less dorsal and ventral setae, ( 2 ) Legs tarsala I<CII, ( 3 ) scutum with posterior margin biconvex.Leptotrombidium (Leptotrombidium) qujingensis sp.nov. (figs. 3:1-5)Idiosoma of partly engorged larva measuring 512x257 microns. Cheliceral blade 37u long. Galeal setae plumose, with 10 barbs. palpal formula N-N-BNN, palpal tarsal setae 7B, palpal claws 3-forked. Shape of scutum as indicated in the figure. PL>AM>AL. SB about in line of PLs. Sensillae filamentous, with 16-17 long branches on distal 3/4, proximal 1/4 nude. Eyes 2 + 2 on ocular plate. Dorsal setae 38 in number, arranged 2-8-8-8-6 -4-2. Sternal setae 2 pairs, ventral setae 37 in number. Legs all 7-segmented, with specialized setae as figured. Standard measurements. AW =72, PW = 85, SB = 35, ASB = 32, PSB = 19, SD = 51, AP = 30, AM = 65, AL = 47, PL = 77, Sn = Z3, HS = 72, DS = 61-42, VS = 35-42, Ip=718u.Holotype colleected from Rattus flavipectus in July, 1971, from Yunnan Province.This new species is allied toL.(L.) rectanguloscuta Hsu & Chen(1964), but differs in. ( 1 ) not similar shape of scutum and posterolateral setae inserted on posterolateral corners of scutum, (2) scnsillae with 16-17 long branches and alone distal 1/4 nude, (3) PSB greater than ASB one half, ( 4 ) with short dorsal setae and ventral setae.Leptotrombidium (Leptotrombidium) sinicum, sp. nov. (figs.4:1-5) Body orange red when alive, elongated oval, engorged larvae 590-657 x 403-453u, unengorged larvae 390-427 x 278-293u. Cheliceral blade 37-41u long. Gal更多还原