Stigmaeus longipilis ( Canestrini, 1889 )

Yali, Maryam Pahlavan, Khanjani, Mohammad & Razmjou, Jabraeil, 2011, A new stigmaeid mite species from Iran (Acari: Stigmaeidae) and re-description of Stigmaeus longipilis (Canestrini), Zootaxa 3089, pp. 60-68 : 64-67

Stigmaeus longipilis ( Canestrini, 1889)

( Figs. 10–18 )

Stigmaeus longipilis Berlese (1910)

Storchia longipilis Oudemans, 1923: 145 –155

Stigmaeodes elongates var. longipilis — Canestrini, 1889: 449 Stigmaeus longipilis Oudemans, 1927: 257 –263

Stigmaeus eutrichus Berlese, 1910 — Summers, 1962: 511 –512 Stigmaeus eutrichus Berlese, 1910 — Wood (1973) Stigmaeus longipilis Liang & Hu, 1987: 308

Stigmaeus longipilis Kuznetsov, 1978: 682 –694

Stigmaeus longipilis Berlese, 1910 — Spongoski, 2008: 118

Diagnosis (Female). Prodorsal shield smooth, dorsum with 14 pairs of setae, femora I–IV 6 - 5 -3 - 2 setae, genua I-IV 3 + (1ĸ) - 3 (1ĸ) - 0 - 1, aggenital setae three pairs; distance of vi/vi - vi 1.20 (1.40), vi/vi-vi 0.30 (0.28), c1 / c1-c1 0.48 (0.55); c1-c1: d1 - d1: e1 - e1: f1 - f1 0.61 - 0.63: 0.57–0.55: 0.49–0.48: 1.0. Ratio: ve/sci 11.41–11.91.

Female (n = 2). Color in life red. Measurements as follows: Length of body (excluding gnathosoma) 443– 446); width 175–179; length of leg I 178 –181; leg II 138–141; leg III 131–136, leg IV 131–162. vi 29–31, ve 131– 137.

Dorsum ( Fig. 10 ). Prodorsal shield almost oblong and smooth; with three pairs of setae (vi, ve, sci), with a pair of eyes 8–9 and post ocular bodies 30–33 (Fig. 30); median opisthosomal shield with three pairs of setae (c1, d1, e1) and three pairs of paired (lateral opisthosomal, intercalary and lateral zonal shields) and two unpaired shields (median and suranal) ( Fig. 10 ). Length of dorsal setae as follows: vi 29–31, ve 131 -137, sci 11–12, sce 32–35, c 1 21 -25, c 2 96–99, d 1 19–21, d 2 18–22, e 1 20 –24, e2 93 –98, f 1 27–29, h 1 28–29, h2 41–44; distances between dorsal setae: vi - vi 24–22, ve - ve 41–37, vi - ve 21–23, sci - sci 39–44, sce - sce 96–101, ve-sci 14–16, c1-sce 57–61, c2 - sce 64– 67, c1 - c1 44–46, c1 - c2 54–57, c2 - c2 52–58, c1 - d1 50–54, d1 - d1 40–41, d1 - d2 44–46, d1 - e 1 50, d1 - e 2 71–74, d2 - e 2 70–75, d2 - d2 123–128, e1 - e 1 34 -36, e2–e2 122–125, e1 - e 2 42–46, e1 - f1 40 -43, f1 - f1 70–75, f1 - h1 41–44, h1 - h 1 29– 27, f1 - h 2 30–34, h2 - h2 72–75; ratio: vi/vi - vi 1.20–1.40, c1 / c1 - c1 0.48–0.55, d1 / d1 - d1 0.48–0.51, e1 / e1 - e 1 0.59– 0.67, f1 / f1 - f1 0.38–0.39, h1 / h1 - h1 0.97–1.04, h2/h2 - h2 0.57–0.58, h1/h2 0.70–0.69, c1 - c1: d1 - d1: e1 - e1: f1 - f1 0.63– 0.61: 0.57–0.55: 0.49–0.48: 1.0.

Venter ( Fig. 14 ). Ventral cuticle transversely striated between coxisternae II-III; coxae I-II and III-IV surrounded by longitudinal striae ( Fig. 14 ). Length of setae la 26–28, 1b 22–26, 1c 19–21, 2b 21–24, 2c 20–23, 3a 23– 25, 3b 19–21, 3c 20–22, 4a 21–23, 4b 18–20 and 4c 18–22. Aggenital (ag1,3) setae as long as pseudanal setae (ps2,3); ag2 longer than ag1, 3; measurements of setae: setae ag 1 20–21, ag 2 27–31, ag 3 19–22, g 1 14–15, ps1 32–35, ps 2 21–23, ps 3 23–25. Distances: ag1 - ag 1 19–21, ag2 - ag 2 22–25, ag3 - ag3 44–46, ps1 - ps 1 17–19, ps2 - ps 2 27–29, ps3 - ps 3 27–30.

Gnathosoma ( Figs. 11-13 ). Subcapitulum with two pairs of subcapitular setae ( Fig. 13 ), m 20–21 and n 20–22, two pairs of adoral setae, or 1 15–16, or 2 26–29; distances: or1 - or 1 10–11, or2 - or 2 10–12, m- m 19–21, n -n 20–22, or1 - m 18–22, m - n 13–15 ( Fig. 11 ). Chelicerae free 75–78, movable digit 64–70. Palp five-segmented; palp tarsus with four simple setae, tri-dentate eupathidion + one simple eupathidion + one solenidion; palp tibia with two setae + one well developed claw + one accessory claw; palp genu with two setae; palp femur with three setae ( Fig. 12 ).

Legs ( Figs. 15-18 ). Legs about half length of body. Setal formulae of leg segments as follows (solenidia, in parenthesis): coxae 2 + (1ε p) - 2 - 2 - 2; trochanters 1 - 1 - 2 - 1; femora 6 - 5 - 3 - 2, genua 3 + 1ĸ - 2 - 0 - 1; tibiae 5 + 1φρ + 1φ - 5 + 1φρ - 5 + 1φρ - 5 + 1φρ; tarsi 13 + 1ω - 8 + 1ω - 7 + 1ω - 7 + 1ω. Length of solenidia: I ω 17– 19, II ω 13–16, III ω 11–12, IV ω 8–9. Coxa I contains supracoxal spine-like seta 1ε p 3-4 long.

Remarks. The Iranian specimens exhibit most of the characters of the original description of Stigmaeus longipilis (Canestrini) . However, the following differences were observed: length of solenidion on tarsus I (ω) 17–19 [in Utah ( USA) specimens 12]; prodorsal shield almost oblong but triangular in Russian specimens; seta c2 longer than Russian specimens, ratio c1/c2 0.21–0.25 in Iranian specimens versus 0.29 in Russian specimens. Ratio: ve/sci 11.41–11.91 in Iranian specimens versus 10.4 in the original description and 11.2 in the Turkish specimens.

Distribution. This species is recorded from Turkey ( Koç & Ayyilldiz 1997), Italy ( Berlese 1910; Wood 1973), USA ( Summers 1962), Germany ( Oudemans 1927), Ukraine (Kuznetsov 1978).

Material examined. Two females were collected from soil under hazelnut trees ( Corylus avellana L.) [Betulataceae], vicinities of Ardabil city, Ardabil province Iran (38° 14' 57" N, 48° 18' 5" E, 1263 m a.s.l.); 2 August, 2010; by M. Pahlevani.

Figures

FIGURES 10 – 14. Stigmaeus longipilis (Female): 10. dorsum, 11. chelicerae, 12. palp, 13. subcapitulum, 14. venter.

FIGURES 15 – 18. Stigmaeus longipilis (Female): 15. leg I, 16. leg II, 17. leg III, 18. leg IV.