| abstract | This paper reports three new species of Trombiculinae belonging to genus Cheladonta Lipovsky et al, Euschoengastia Ewing and Ascoschoengastia Ewing. Type specimens are deposited in the Research Institute of Endemic Disease Control, Qinghai Province.
1. Cheladonta globosea sp. nov. (figs 1-6)
Body white when alive. Idiosoma length 617.5(570-640). width 562.5(480-620). Galeal seta nude. Palpal setae fomula B.B.BNB/4B, palpal claw 6-pronged, cheliceral with teeth on ventral. Scutum rectangular. Sensillae globular with dense barbs on surface. PLs/SB, PL>AL>AM. Eyes 2+2. Dorsal setae 52-53 in number, arranged as 4·16·12·10·6·2·2=52, 4·18·11·10·6·2·2=53, ventral setae 24al2=36 in number. Sternal setae 2·2. Coxal setae 1·1·2. Legs; I=260 II=220 III=250. Ip=730. SIF=4B-N-6-2110-0000.
Holotype larva collected off Pitymys irene Thomas, August 7, 1985, 3 paratypes off Ochotona cansus Lyon, May 31, 1985, from Jiuzhi County (32°3ʼ N, 101°1ʼ E), Qinghai Province.
This new species is resembles to Cheladonta bicoxalae Wen, Zhou et al. 1984, but separable with fp=B.B.BNB, PLs/SB, PL>AL>AM, SP=27.5, sensillae globular.
2. Euschoengastia jiuzhiensis sp. nov. (figs 7-11)
Body orange when alive. Idiosoma length 543.5(430-660), width 495.7(360 -460). Galeal seta branches. Palpal setae fomula B.B.bbB/7B, the palpotibial dorsal seta with 6-7 branches, lateral seta with 1-2 branches, Palpal claw 6 pronged. Scutum punctate, PW=5.5AP, sensillae club-shaped. ALs/AM, PLs/SB, PL>AL>AM. Eyes 2+2. Dorsal setae 54-58 in number, arranged as 2·13·15·11·9·6·2=58, 2·12·13·12·7·6·2=54. Ventral setae 24al2=36 in number. Sternal setae 2·2. Coxal setae 1·1·1. Legs: I=235.2 II=227.2 III=254.2. IP =716.6. SIF=7B-B-6-2110-0000.
Holotype larva collected off Ochotona curzoniae Hodgson June. 7, 1985, 9 paratypes off Ochotona cansus Lyon and Microtus oeconomus Pallas. May 30, August 12, 1985, from Jiuzhi County (32°0ʼ N, 101°1ʼ E), Qinghai Province. 1 paratypes off Pitymys irene Thomas, May 18, 1983, from Hualong County (36°06ʼ N 102°17ʼ E) Qinghai Province.
This new species is resembles to Euschoengastia kalokunluna Shao et Wen, 1984 but scutum larger, AW=70, PW=106.5, SB=35, AP=19, NDV=104.
3. Ascoschoengastia minheensis sp. nov. (figs 12-15)
Body orange when alive. Idiosoma engorged 400X280. Galeal seta nude. Palpal setae fomula B.B.BBB/6B, palpal claw 3-pronged. Scutum small subguadrate in shape, with distinct antero-lateral shoulders. Posterior margin rounded. Sensillae elongate club-shaped. ASB>PSB, AM/ALs. PL>AM>AL. Eyes 2+2. Dorsal 54-57, in number, arranged as 2·(11·5)·14·8·8·4·2=54. 2·(9·10)·14·8·8·4·2=57. Ventral setae 41al2=53, in number, sternal setae 2·2. Coxal setae 1·1·1. Legs: I=210, 11=190, 111=212.5. Ip=605(580-622.5). SIF=6B-N-3-3111-0000.
Holotype and 8 paratypes, larvae collected off Meriones meridianus Pallas, August 23, 1985 from Minhen County (36°35ʼ N 102°56ʼ E) Qinghai Province.
This new species is resembles Ascoschoengastia leechi Domrow, 1962 but scutum small, AL, AM, PL longer. SB=21.6, ASB=25.8, PSB=20, NDV=107. |