Sperchon (Hispidosperchon) huangshanensis, Zhang, Xu & Jin, Dao-Chao, 2010

Zhang, Xu & Jin, Dao-Chao, 2010, Three new species and one new record of the subgenus Hispidosperchon Thor, 1901 within the genus Sperchon Kramer, 1877 from China (Acari: Sperchontidae), Zootaxa 2684, pp. 14-24 : 22-23

Sperchon (Hispidosperchon) huangshanensis sp. nov.

Figure D (1–9)

Type series. Holotype: Female, China, Anhui Province, Huangshan city, Tangkou towns, Zhaixi village, Fuxi scenic area, moss of the mountain stream (N30°04'17'', E118°09'26''), 18 May 2010, leg. Xu Zhang. The holotype was dissected and slide-mounted.

Diagnosis. O 1 in front of A1 and lateral eyes; A1 short and plumose; excretory pore without sclerotized ring; ventral projection of P-II long and with three setae; two ventral peg-like setae located at the mesial whole-length and the middle of distal half of P-IV; I-IV-3-5 with rather long plumose setae in longitudinal rows.

Description. Female: Body oval in shape, 800 in length, 745 in width. Cuticle covered with very fine spinules arranged in hexagonal pattern (Fig. D-7). A1 short and plumose, other dorsal setae relatively thin and long. O1 slightly anterior to A1. Chitinous plates and glandular plates on both dorsum and venter well developed as shown in Fig. D-1 and Fig. D-2. A2 fused with a pair of plates, O2 on large plates. Coxae in four groups. Surface of coxae reticulated. ACG 210 in length, close to each other but not fused, anterior apodemae well developed. E2 on the lateral interval between ACG and PCG. PCG 240 in length and widely separated. E4 close to anterior margin of CxIII. Distance between anterior end of ACG and posterior end of PCG 385. Genital field between PCG. Genital valves not covering the genital acetabula, 190 in length, 130 in width. Pre- and postgentital sclerites developed. Two anterior pairs of acetabula elliptic and the posterior pair more or less rounded. V1 without accompanying glandularia, but on very small sclerites in-between genital field and excretory pore. Excretory pore without sclerotized ring and posterior to V2. Gnathosoma with a long rostrum, 218 in length. Chelicera total length 206, basal segment length 152, claw length 54, ratio of basal segment/ claw length 2.8. Dorsal lengths of the palpal segments: P-I, 26; P-II, 112; P-III, 146; P-IV, 145; P-V, 46. P-I without seta. P-II with long ventro-distal projection bearing three setae, of which one longer than other twos in equal length; the lateral and dorsal of P-II with about thirteen short and smooth setae, of which seven much thicker. The ventral side of P-III nearly straight and without seta, five short smooth setae on the lateral and dorsal side. P-IV slender, longer than P-III, and with two ventral peg-like setae, of which the proximal one almost at ventral middle of the segment, and the distal one approximately equidistant from proximal one and distal end of the segment. Dorsal lengths of leg I: I-L-1, 50; I-L-2, 55; I-L-3, 70; I-L-4, 140; I-L-5, 130; I-L-6, 120. Dorsal lengths of leg IV: IV-L-1, 100; IV-L-2, 115; IV-L-3, 185; IV-L-4, 230; IV-L-5, 210; IV-L-6, 190. Third-fifth segments of leg I-IV with rather long plumose dorsal setae in longitudinal rows (Fig. D-3 and Fig. D-9). Ambulacrum with two claws. Each claw with claw blade well protruding, bearing a long dorsal and a shorter ventral clawlet (Fig. D-8).

Etymology. The species is named after the city where it was collected.

Remarks. All the known species in the subgenus Hispidosperchon Thor, 1901 have similar chaetotaxy on the the dorsum. Generally, O1 is posterior to A1 and between or sometimes slightly anterior to the lateral eyes, whereas in the new species, O1 anterior to A1 and lateral eyes. This is a unique character for the new species. If regardless of the unique character, the new specimen is similar to S. indicus and S. gledhilli ( Cook 1980; Kumar et al. 2007). In the latter two species, the two peg-like setae on the ventral side of P-IV are small and the distal one is closer to the terminal end of the segment, while the two peg-like setae are relatively heavier and the distal one is far from the terminal end of the segment in the new species. Excretory pore has no sclerotized ring in the new species but sclerotized in S. indicus and S. gledhilli .

FIGURE D (1–9). Sperchon (Hispidosperchon) huangshanensis sp. nov., Male. 1. idiosoma, dorsal view; 2. idiosoma, ventral view; 3. IV-L-1-6; 4. chelicera; 5. capitulum; 6. palp; 7. decorations of cuticle; 8. claw; 9. dorsal seta of IV-L-3.