Stigmaeus angustus, Dönel, Güldem & Doğan, Salih, 2011

Dönel, Güldem & Doğan, Salih, 2011, The stigmaeid mites (Acari: Stigmaeidae) of Kelkit Valley (Turkey), Zootaxa 2942, pp. 1-56 : 40-42

Stigmaeus angustus sp. nov.

Holotype. Female ( Figure 20 ). Length of body 325 (320), width 148 (135).

Dorsum. Body elongated, narrow between propodosoma and hysterosoma. Dorsal shields smooth. Propodosomal shield with three pairs of setae and a pair of eyes located between setae ve and sci. Post-ocular bodies absent. Apodemal marking on propodosomal shield. Setae sce located on auxiliary shields. Central shield with two pairs of setae. Setae e 1 on median zonal shields. Central shield slightly extending between median zonal shields. Setae e 2 located on lateral zonal shields. Median zonal shields are larger than lateral zonal shields. Setae d 2 located on marginal shields. Intercalary shield divided, with setae f 1. Suranal shield entire, with two pairs of setae. Dorsal body setae smooth. Dimensions of setae as follows: vi 20 (15); ve 75 (70); sci 18 (13); sce 40 (37); c 1 25 (23); c 2 67 (63); d 1 30 (37); d 2 60 (55); e 1 25 (20); e 2 45 (43); f 1 50 (47); h 1 43 (40); h 2 48 (45). Distances between setae: vi-vi 35 (30); ve-ve 40 (35); vi-ve 25 (20); sci-sci 87 (83); ve-sci 25 (20); c 1 -c 1 50 (47); c 1 -d 1 63 (60); d 1 -d 1 53 (50); h 1 -h 1 30 (27); h 1 -h 2 18 (15); h 2 -h 2 68 (63).

Venter. Humeral shields bearing setae c 2. Coxisternal shields separated, bearing three pairs of setae. Three pairs of aggenital setae located on the same shield. Genital covers bearing one pair of setae. Pseudanal covers bearing three pairs of setae. Dimensions of setae as follows: ag 1 18 (15); ag 2 18 (15); ag 3 18 (20); g 1 15 (18) ps 1 23 (25); ps 2 18 (20); ps 3 15 (18).

Legs. Leg I 175 (165), leg II 118 (115), leg III 135 (130), leg IV 158 (150). Chaetotaxy of leg segments as follows: coxae 2–2–2–2, trochanters 1–1–2–1, femora 6–4–3–2, genua 4(κ)–4(κ)–1–1, tibiae 7(ϕ,ϕρ)–6(ϕρ)–6(ϕρ)– 6(ϕρ), tarsi 14(ω)–10(ω)–8(ω)–8(ω). Genua I and II with solenidion κ. All tarsi with solenidion ω.

Gnathosoma . Chelicera 88 (75), palp 65 (60). Subcapitulum with two pairs of adoral setae distally and two pairs of subcapitular setae proximally. Dimension of setae: m 20 (18); n 23 (20), distances between m-m 23 (20); n- n 18 (15).

Male and other immature stages. Unknown.

Etymology. The name of this species, angustus , refers the body narrowing between the propodosoma and hysterosoma.

Type materials. Holotype Ƥ and 1 paratype Ƥ from grassy soil, 40°03'53'' N, 38°35'27'' E, 1306 m, Gölova, 22 IX 2007; ZMAU.

Remarks. This new species resembles Stigmaeus callunae Evans, 1954 , S. longisetosus Liang & Hu, 1987 , S. macroposbus Liang & Hu, 1987 and S. pilatus Kuznetsov, 1978 . However, it can be distinguished from all of them by the following combinations of features: post-ocular bodies absent, c 1 placed on central shield, posterior margin of central shield pointed, aggenital shield entire and all aggenital setae on the same shield.

Figures

FIGURE 20. Stigmaeus angustus sp. nov. female—A, dorsal view of idiosoma; B, ventral view of idiosoma; C, palp; D, leg I; E, leg II; F, leg III; G, leg IV.