Stigmaeus pilatus Kuznetzov

Khanjani, Mohammad, Izadi, Hamzeh, Fayaz, Bahman Asali, Raisi, Hosein, Rostami, Elaheh & Doğan, Salih, 2010, Stigmaeus boshroyehensis sp. nov. (Acari: Stigmaeidae) from eastern Iran, with re-description of Stigmaeus pilatus Kuznetzov, Zootaxa 2727, pp. 34-44 : 40-43

Stigmaeus pilatus Kuznetzov

( Figs. 10–17 )

Stigmaeus pilatus Kuznetzov, 1978: 690 ; Kuznetzov & Petrov, 1984: 109; Khaustov & Kuznetzov, 1997: 83; Kazmierski, 2000: 323; Doġan & Ayyıldız, 2003: 2; Doġan, 2007: 20 .

Diagnosis. Female. Eyes present, postocular bodies large, dorsal shields smooth, median zonal and intercalary shields divided, marginal shields large, suranal shield entire, dorsal body setae unequal in length, median shield with two pairs of setae, h3 absent, genua 3(1)-3(1)-1-1; femora 6-4-3-2.

Description. Female (n = 3). Color in life red. Idiosoma oval. Length of body (including gnathosoma) 515- 513-523; (excluding gnathosoma) 390–392; breadth 186–192 at level of seta c2; length of leg I 216–221; leg II 158–160; leg III 157 –160, leg IV 183–192.

Dorsum ( Figs. 10 ): Prodorsal shield wide oblong, smooth and with three pairs of setae (v1, v2, sc1) and a pair of eyes 8–12 and postocular bodies (pob) 38–43 in diameter ( Fig. 10 ), setae sc2 on separate platelets; hysterosoma covered with longitudinal striations; all dorsal shields smooth, median shield with setae c1 and d1, median zonal shield divided with seta e1, posterior margin of median shield smooth, no extending between median zonal shields; intercalary shield divided with f1, d2 on long and elliptical shield; and e2 located on almost rounded platelet, suranal shield entire with two pairs of setae (h1,2). Dorsal setae short except for setae v2 and c2 which are longest. Humeral shield in ventral position between coxae II–III and setae c2 situated ventrolaterally between coxae II–III. Setae v2 3.40–3.67 times longer than setae v1; dorsal setae short and slightly pilose; lengths of dorsal setae: v1 24 –25, v2 82 – 88, sc 1 19–22, sc2 55–60, c 1 22–24, c 2 72–78, d 1 20–23, d 2 22–25, e 1 21 –23, e2 42 –49, f1 34–37, h1 36–37, h2 47–50; distances between dorsal setae: v1-v1 33 –35, v2-v2 45 –49, v1-v 2 24–27, sc1-sc1 83–91, sc2-sc2 123–125, c1-sc2 72–80, c1-c1 51–52, c1-c2 75– 77, c1-d1 67–70, d1-d1 53–56, d1-d2 45–54, d1- e 1 58–62, d2- e 2 68–71, d2-d2 131–150, e1- e 1 44– 49, e2-e2 106–120, e1- e 2 35–41, e1-f1 34–35, f1-f1 68–73, f1-h1 38–39, h1-h 1 25–27, f1-h2 35–36, d1- e 2 62–65, h2-h2 72– 73, h1-h 2 23–24, ratio: v1 / v 1-v1 0.69 –0.76, c1 / c1-c1 0.43–0.47, d1 / d1-d1 0.38–0.43, e1 / e1- e 1 0.44–0.52, f1 / f1-f1 0.51– 0.54, h1 / h1-h1 1.38–1.42, h2/h2-h2 0. –0.68, h1/h2 0.75 –0.79, c1-c1: d1-d1: e1-e1: f1-f1 = 0.71–0.75: 0.77–0.78): 0.65– 0.67: 1.0–1.0.

Venter ( Fig. 11 ). Seta 1a half length of 1c; ventral cuticle with transverse striae between legs II and III; coxae I–II and III–IV surrounded by longitudinal striae ( Fig. 11 ). Coxisternal or enpodal shields divided. Length of setae 1a 21–25, 1b 18–20, 1c 45–47, 2b 25–27, 2c 42–47, 3a 22–25, 3b 20–21, 3c 19–23, 4a 22–25, 4b 18–20 and 4c 11– 12. Three pairs of aggenital setae (ag1-3), ag1 located on small platelet, ag2-3 located on same shield; anogenital covers bearing four pairs of setae, including one pair of genital seta (g) and three pairs of pseudoanal setae (ps1-3); measurements of setae: ag 1 19–22, ag 2 19–21, ag 3 21–26, g 1 8–10, ps1 33–36, ps 2 23–26, ps 3 15–18. Distances: ag1- ag 1 18–21, ag2-ag2 38–41, ag3-ag3 58–61, ag1-ag 2 24–26, ag2-ag 3 24–25, g -ps 3 29–32, ps1-ps 1 31–35, ps2-ps 2 30–34, ps3-ps 3 28–32, ps2–ps 3 9–12, g1-g1 8–9.

Gnathosoma ( Figs. 12, 13 ): Chelicerae hinged at base, movable digit 72–75, cheliceral base 71–73; palp coxa with supra coxal seta 4–5 ( Fig. 13 ). Subcapitulum with two pairs of subcapitular setae, m 24–27 and n 18 (15–16), two pairs of adoral setae, or 1 12–13, or 2 16–18; distances: or1- or1 5–6, or1- or2 3–4, or2- or 2 12–14, m- m 14–26, n- n 29–31, or1- m 20–22, or2- m 20–22, m-n 15–17 ( Fig.13 ). Palpi five segmented, palp tarsus with five simple setae + one solenidion (ω) 5–6 + one terminal tridentate eupathidium, tibia with two simple setae + one well developed claw 18–20 + one accessory claw 5–6; palp genu with two setae 32–39, 17–21 and palp femur with three setae 42– 58, 33–40, 30–32 ( Fig. 12 ).

Legs ( Figs. 14–17 ): Legs about half length of body. Setal formulae of leg segments as follows (specialized sensory setae such as solenidia, in parenthesis): coxae 2-2-2-2; trochanters 1-1-2-1; femora 6-4-3-2, genua 3(κ)-3- 1-1; tibiae 5(1φ,1φρ)-5(1φρ)-5(1φρ)-5(1φρ), length of solenidion: Iφρ 31(29–31), IIφρ 26(25–28), IIIφρ 25–27, IVφρ 29–32; tarsi 13(1ω)-9(1ω)-7(1ω)-7(1ω). Length of solenidia: Iω 17(15–17), IIω 10–11), IIIω 6–7, IVω 5–6.

Male and immature stages. Not found.

Material examined. One female was collected from soil under plum trees ( Prunus cerasifera Ehrh. ) [ Rosaceae ] Heydareh village, vicinity of Maryanaj city, Hamedan province, Iran (34° 48' 27" N, 48° 28' 0.85" E, 1873m a.s.l.); 16 October, 2008; by E. Rostami and two females from soil under apple trees ( Malus domestica Borkh. ) [ Rosaceae ], Imam Zadehkoh village, vicinity of Maryanaj, Hamedan province, Iran (34° 48' 13.12" N, 48° 23' 28.17" E, 2188 m a.s.l.); 22 November 2008, by E. Rostami.

Distribution. The Baltic States and Turkey ( Kuznetzov, 1978; Kuznetzov & Petrov, 1984; Khaustov & Kuznetzov, 1997; Kazmierski, 2000; Doğan & Ayyıldız, 2003; Doğan, 2007).

Discussion. The Iranian specimens exhibit most characters of S. pilatus Kuznetzov, 1978 ; however, in the original description and the Turkish specimens ( Doğan & Ayyıldız, 2003), genu II has solenidion ĸ whereas it is lacking in Iranian specimens; posterior margin of median hysterosomal shield smooth in the Iranian specimens whereas projecting in between median zonal shields in the original descriptions. Comparisons between Iranian and Turkish specimens are given in table 2.

characters Iranian specimens Turkish specimens v1-v1 33 –35 27

v2-v2 45 –49 37

v1-v 2 24–27 17

sc1-sc1 83–91 70

c1-c1 51–52 43

The authors wish to thank Prof. Eddie A. Ueckermann, ARC- Plant Protection Research Institute, Pretoria, South Africa, for supplying the authors with literature.

Figures

FIGURES 10 – 13. Stigmaeus pilatus Kuznetzov (Female): 10. dorsal view, 11. venteral view, 12. palp, 13. subcapitulum.

FIGURES 14 – 17. Stigmaeus pilatus Kuznetzov (Female): 14. leg I, 15. leg II, 16. leg III, 17. leg IV.