Primagistemus wuyiensis, Fan & Zhang, 2002

Fan, Qing-Hai & Zhang, Zhi-Qiang, 2002, Primagistemus gen. nov. (Acari: Prostigmata: Stigmaeidae), Zootaxa 29, pp. 1-8 : 6-8

Primagistemus wuyiensis sp. nov. ( Figs. 13­17 )

Material examined. Holotype female, on leaves of Araucaria sp., Wuyi Mountain , Fujian, China, 11.viii.1994, Fan Qing­Hai. In the collection of Department of Plant Protection, Fujian Agricultural and Forestry University, Fuzhou, Fujian Province, China . Paratypes. One female, 2 deutonymphs, same data as holotype .

Diagnosis. Adult females of Primagistemus wuyiensis sp. nov. are characterized by having all dorsal body setae (except sci) truncated, which differ from tapered setae of P. loadmani . More diagnostic features are listed in key to species above.

Description of female (n=2)

Gnathosoma. Chelicerae conical ( 114­116 m); movable digits long ( 61 m), about one­half length of chelicerae. Palp robust ( 89­95 m); dorsal femoral seta truncated distally; tarsus extending beyond tip of tibial claw; accessory claw slender, slightly shorter than palptibial claw. Counts of setae, solenidia and claws on palp (from trochanter to tarsus): 0, 3, 1, 2 + 1 spin­like accessory claw + 1 claw, 4 + 1 + 1 subterminal eupathidium + 3 basally fused eupathidia. Subcapitulum plain, without clear punctation; subcapitular setae m ( 28­29 m) much shorter than n ( 46­48 m); distance between m ­m ( 38­39 m) wider than it between n ­n ( 31­33 m) and 3 times as wide as distance between m­n ( 12­13 m).

Idiosoma. Oval in shape ( 380­386 m long, 245­249 m wide). Dorsal body setae (except sci) truncated, terminating abruptly in jagged ends, but without clear tubercles at their bases. Propodosomal setae vi ( 34­38 m) about 1.4 times distance between vi­vi ( 25­ 26 m); ve ( 45­48 m) 1.4 times distance between ve­sci ( 30­33 m); sci minute ( 10­11 m), mediad of sce in the same row, nearly one­fourth distance between sci­sce ( 38­40 m); sce ( 51­53 m) slightly longer than ve; ratio ve/sci = 4.1, ve/sce = 0.9. Central hysterosomal shield broad, bearing 3 pairs of setae, c1 ( 35­39 m), d1 ( 29­32 m) and e1 ( 25­ 26 m); c1 about one­third distance between c1­c1; d1 less than one­third distance between d1­d1; e1 nearly two­fifths distance between e1­e1. Setae c2 ( 56­58 m), d2 ( 39­41 m), e2 ( 29­32 m) and f1 ( 32­35 m) arise from platelets. Ratio c1­c1: d1­d1: e1­e1: f1­f1 = 1.6: 1.7: 1: 1.8. Distances between setae, c1­c1 = 103 ( 99­104 m), c1­d1 = 71 ( 68­74 m), d1­ d1 = 111 ( 109­115 m), d1­d2 = 41 ( 39­43 m), d1­e1 = 55 ( 54­55 m), e1­e1 = 65 ( 60­71 m), e1­e2 = 33 ( 28­35 m), e1­f1 = 46 m, f1­f1 = 117 ( 113­120 m). Suranal shield integral, bearing 2 pairs of setae ( h1 and h2), h1 ( 38­39 m) shorter than h2 ( 43­45 m). Distances between setae: h1­h1 = 30 ( 29­31 m), h1­h2 = 33 m. Ventral setae 3 pairs ( 1a, 3a and 4a), 1a ( 40­43 m) and 3a ( 38­42 m) slightly longer than 4a ( 33­35 m). Aggenital setae 3 pairs ( ag1, ag2 and ag3); ag1 ( 30­31 m) on small platelets; ag2 ( 26­27 m) and ag3 ( 48 m) situated on a horseshoe­like shield. Genital setae 1 pair, g1 ( 40­42 m), its tip reaching base of ps2. Pseudanal setae 3 pairs ( ps3, ps2 and ps1), ps3 ( 26­27 m) tapered, ps2 ( 27­28 m) and ps1 ( 29­30 m) truncated distally.

Legs. Length (from base of trochanter to tip of tarsus): leg I = 232 ( 225­236 m), leg II = 175 ( 169­179 m), leg III = 168 ( 160­170 m), leg IV = 198 ( 187­202 m). Dorsal setae d on femora I­IV, on genera I, II and IV truncated as dorsal body setae. Tarsi I­IV each bearing 1 solenidion, I = 14 ( 13­15 m), II = 13 ( 13­14 m), III = 8.5 m, IV = 6 m. Counts of setae and solenidia on legs I­IV: coxae 2, 1, 2, 2; trochanters 1, 1, 1, 0; femora 5, 4, 3, 2; genua 3 + 1, 2, 0, 0; tibiae 5 + 1 p, 5 + 1 p, 5 + 1 p, 5 + 1 p; tarsi 13 + 1, 9 + 1, 7 + 1, 7 + 1.

Habitat and distribution. From leaves of Araucaria sp., Wuyi Mountain, Fujian, CHINA.

Figures

FIGURES 13 ­ 17. Primagistemus wuyiensis sp. nov. (adult female). 13, dorsal view of gnathosoma and idiosoma; 14, right palp; 15, genito­anal area; 16, dorsal setae; 17, tarsus I.