Stigmaeus boshroyehensis, Khanjani, Mohammad, Izadi, Hamzeh, Fayaz, Bahman Asali, Raisi, Hosein, Rostami, Elaheh & Doğan, Salih, 2010

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 : 36-39

Stigmaeus boshroyehensis sp. nov.

( Figs. 1–9 )

Diagnosis. Female. Eyes present; seta v2 longer than c2; suranal shield entire with 2 pairs of setae (h1-2); median hysterosomal shield with 3 pairs of setae; aggenital shield entire with 3 pairs of setae; genua 3-3-1-1 propodosomal setae v1 / v2 0.26 (0.27–0.3); ratio of distances c1-c1: d1-d1: e1-e1: f1-f1 = 0.72 (0.73–0.71): 0.77 (0.73–0.78): 0.60 (0.62–0.64): 1.0 (1.0–1.0).

Description. Female (n = 5). Color in life red. Idiosoma oval. Length of body (including gnathosoma) 484 (455–485); (excluding gnathosoma) 357 (335–350); width 165 (167–190); length of leg I 202 (204–220); leg II 153 (151–161); leg III 149 (141–150), leg IV 184 (181–198).

Dorsum ( Fig. 1 ): Prodorsal shield pentagonal and smooth with a pair of eyes and three pairs of setae (v1, v2, sc1); seta sc2 on lateral platelets, no postocular bodies and no apodemal marking ( Fig. 1 ); hysterosoma covered with eight shields, median hysterosomal shield bearing three pairs of setae (c1, d1, e1); lateral shields (marginal shields) elongate with a pair of seta (d2); seta e2 on lateral zonal shields; intercalary shield divided bearing a pair of setae (f1) and suranal shield entire, with two pairs of setae (h1, h2). Dorsal setae very slightly serrate ( Fig. 1 ). Setae c2 situated ventro-laterally between coxae II–III. Setae v2 at least three times longer than setae v1; lengths of dorsal setae: v1 23 (22–27), v2 89 (83–90), sc1 18 (18–19), sc2 48 (48–50), c1 20 (20–21), c 2 76 (67–71), d1 22 (21–23), d2 22 (21–22), e1 22 (21–22), e2 42 (38–46), f1 35 (33–36), h1 36 (34–38), h2 39 (41–47); distances between dorsal setae: v1-v1 30 (30– 32), v2-v2 40 (40–41), v1-v2 26 (21–28), sc1-sc1 75 (73–79), sc2-sc2 105 (113–118), v2 -sc1 25 (22–23), sc2-c2 69 (68– 71), sc2-c1 71 (61–71), c1-c1 46 (49–50), c1-c2 57 (60–74), c2-c2 165 (167–190), c1-d1 64 (60–68), d1-d1 50 (49–55), d1- d2 40 (41–49), d1- e 1 62 (50–58), d2- e 2 76 (71–78), d2-d2 114 (114–123), e1- e 1 39 (42–45), e2- e 2 95 (95–124), e1- e 2 30 (25–40), e1-f1 25 (27–36), f1-f1 65 (67–70), f1-h1 35 (37–39), h1-h1 28 (27–29), f1-h2 32 (34–39), h2-h2 70 (73–74); ratio: v1 / v 1-v1 0.77 (0.73–0.84), c1 / c1-c1 0.43 (0.41–0.42), d1 / d1-d1 0.43 (0.40–0.44), e1 / e1- e 1 0.57 (0.48–0.52), f1 / f1-f1 1.0 (1.0), h1 / h1-h1 1.29 (1.26–1.31), h2/h2-h2 0.56 (0.56–0.63), h1/h2 0.92 (0.83–0.81), c1-c1: d1-d1: e1-e1: f1-f1 = 0.72 (0.73–0.71): 0.77 (0.73–0.78): 0.60 (0.62–0.64): 1.0 (1.0–1.0).

Venter ( Figs. 4, 5 ): Ventral cuticle transversely striate between legs II and III; coxae I–II and III–IV surrounded by longitudinal striae ( Fig. 4 ). Coxisternal or endopodal shields divided; Length of setae 1a 21 (20–24), 1b 19 (18– 19), 1c 36 (35–38), 2b 20 (18–20), 2c 36 (35–39), 3a 20 (17–24), 3b 20 (18–20), 3c 15 (15–16), 4a 11 (11–16), 4b 27 (23–28) and 4c 11 (11–14). Aggenital setae (ag1-3) on same shield. Anogenital valves with a pair of genital setae (g) and three pairs of pseudanal setae (ps1-3). Seta ps1 3.6 times as long as ps3; measurements of setae: ag1 15 (15– 16), ag2 20 (20–21), ag3 20 (19–21), g1 20 (17–21), ps1 39 (38–40), ps2 21 (23–28), ps 3 11 (14–16). Distances: g-g 9 (9), ag1-ag1 21 (23–26), ag2-ag2 37 (34–35), ag3-ag3 50 (50–58), ag1- ag2 22 (20–24), ag2- ag3 30 (29–32), ps1-ps1 21 (23–25), ps2-ps2 27 (29–31), ps3-ps3 20 (21–23), ps2 -ps3 11 (10–12).

Gnathosoma ( Figs. 2, 3 ): Subcapitulum with two pairs of subcapitular setae, m 25 (24–26) and n 16 (16–18), two pairs of adoral setae, or1 10 (8–11), or2 15 (15–18); distances: or1- or1 6 (6–7), or2- or2 12 (11–12), m- m 21 (22–22), n-n 31 (30–31), or1- m 19 (19–21), m-n 18 (16–19) ( Fig. 2 ). Chelicerae free 120 (118–121), movable digit 68 (67–73) ( Fig. 1 ). Palpi five segmented, palp tarsus with five simple setae + one solenidion (ω) 6 (5–7) + one trifid eupathidium 9 (9–11), palp tibia with two tactile setae + one well developed claw + one accessory claw, palp genu with two setae and palp femur with three setae ( Fig. 3 ).

Legs ( Figs. 6–9 ): 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(1φρ,1φ)-5(1φρ)-5(1φρ)-5(1φρ); tarsi 12(1ω)-9(1ω)-7(1ω)-7(1ω). Length of solenidia: ωI 17 (18–20), ωII 13 (12–14), ωIII 12 (11–12), ωIV 9 (8–9).

Male. Not found.

Etymology. This species is named after the town where it was collected.

Discussion. Stigmaeus boshroyehensis sp. nov. resembles to S. malekii Haddad, Bagheri and Khanjani in general appearance and in having three pairs of setae on the median hysterosomal shield. However, it can easily be differentiated by: eyes present in S. boshroyehensis whereas absent in S. malekii ; tarsus II 9 (1) in the former opposed to 7(1) in the latter; tibia I with two solenidia in S. boshroyehensis but with one in S. malekii ; palp tarsus with five tactile setae in the new species but with four in S. malekii ; d2-d2 114 (114–123) vs. 143 (135–142). Also the comparisons between the Iranian Stigmaeus species are given in Table 1 .

Characters/Species S. boshroyehensis sp. nov. S. candidus S. alvandis S. elongatus Coxae 2-2-2-2 2-2-2-2 2-2-2-2 2-2-2-2 Ta r si 12(1)-9(1)-7(1)-7(1) 12(1)-8(1)-6(1)-6(1) 13(1)-9(1)-7(1)-7(1) 13(1)-9(1)-7(1)-7(1) The new species is also similar to S. fidelis Kuznetzov ; however it can be distinguished from the latter by the genual setal formula, prodorsal shield without postocular body, aggenital shield entire.

Type material. Holotype and four paratype females, 19 November, 2009 were collected from soil under pistachio trees, Boshroyeh, South Khorasan province, east of Iran (33° 53' N, 57° 25' E, 873m s.a.l.); collected by Hosein Raisi. The holotype and four paratype females of the new species are preserved as slide-mounted specimen and deposited in the Collection of Acarology Laboratory, University of Bu-Ali Sina, Hamaden, Iran and one paratype female will be deposited in the National Collection of Arachnida, Plant Protection Research, Pretoria, South Africa.

Figures

FIGURES 1 – 5. Stigmaeus boshroyehensis sp. nov. (Female): 1. dorsal view, 2. subcapitulum, 3. palp 4. venteral view, 5. anogenital area.

FIGURES 6 – 9. Stigmaeus boshroyehensis sp. nov. (Female): 6. leg I, 7. leg II, 8. leg III, 9. leg IV.

Tables

TABLE 1. Distinguishing characters of Iranian Stigmaeus species.

Trochanters	1-1-2-1	1-1-2-1	1-1-1-1	1-1-2-1
Femora	6-4-3-2	6-5-3-2	4-4-3-1	6-6-3-2
Genua	3(1)-3-1-1	5(1)-2-0-1	6-5-2-2	5(1)-5-3-3
Tibiae	5(2)-5(1)-5(1)-5(1)	5(2)-5(1)-5(1)-5(1)	5(2)-5(1)-5(1)-5(1)	5(2)-5(1)-5(1)-5(1)