Stigmaeus delaramae Khanjani

Khanjani, Mohammad, Nasrollahi, Siamak, Zamani, Ali Sina & Fayaz, Bahman Asali, 2014, Cheylostigmaeus tarae sp. nov. and Stigmaeus delaramae sp. nov. (Acari: Stigmaeidae) from Kurdistan, Iran, Zootaxa 3841 (3), pp. 364-378 : 371-374

Stigmaeus delaramae Khanjani sp. nov.

( Figs. 21–29 )

Diagnosis (Female). Median propodosomal shield present; coxisternal and legs reticulated; aggential region with three pairs of setae (ag1–3); genua III with one seta; femur II with five setae; median hysterosomal shield with three pairs of setae; hysterosoma with median shield.

Description. FEMALE (n = 3). Color in life red. Idiosoma oval. Length of body including gnathosoma 550 (535–600), length of body excluding gnathosoma 450 (420–460); width 275 (265–300).

Dorsum ( Figs. 21–22 ). All dorsal shields with polygonal reticulation except lateral propodosomal shield. Median prodorsal shield triangular and with three pairs of setae (vi, ve, sci), eyes and post ocular bodies present, 15 (13–15) and 27 (25–31) in diameter respectively ( Fig. 21 ); setae sce located on smooth lateral propodosomal shield; median shield with three pairs of setae (c1, d1, e1). Intercalary shield separated and with setae f1; suranal shield entire and with two pairs of setae (h1–2). All dorsal setae serrated in distal half, except setae ve finely serrated. Setae ve longest dorsal setae; measurements of dorsal setae: vi 65 (55–60), ve 90 (75–80), sci 50 (45–50), sce 60 (55–60), c1 51 (46–48), c2 76 (65–70), d1 55 (50–58), d2 60 (58–69), e1 55 (50), e2 60 (52–54), f1 63 (60–68), h1 68 (62–72), h2 73 (63–72); distances between dorsal setae: vi– vi 32 (28–30), ve–ve 76 (80), vi–ve 65 (60–65), sci–sci 133 (125–130), ve–sci 55 (57–60), sci–sce 30 (30–40), sce–c1 73 (72–90), c1–c1 71 (66–72), c2–c2 71 (66–72), c1–d1 80 (80–105), d1–d1 93 (92–105), d1–d2 72 (60–87), d1– e1 70 (68–80), d1– e2 70 (75–90), d2– e2 88 (82–90), d2–d2 222 (220–260), e1– e1 72 (71–85), e2–e2 180 (170–225), e1–f1 55 (52–75), f1–f1 112 (110–135), f1–h1 65 (52–70), h1–h1 48 (47–55), f1–h2 48 (40–60), h2–h2 95 (88–115), h1–h2 22 (20–30); ratio: vi: vi–vi 2.03 (1.96–2.0), c1: c1–c1 0.71 (0.66–0.69), d1: d1–d1 0.59 (0.54–0.55), e1: e1– e1 0.76 (0.58–0.70), f1: f1–f1 0.56 (0.50–0.54), h1/h1–h1 1.41 (1.30–1.31), h2/h2–h2 0.76 (0.62–0.71), h1: h2 0.93 (2.25–2.4), c1–c1: d1–d1: e1–e1: f1–f1: 0.63 (0.53–0.60): 0.83 (0.77–0.83): 0.64 (0.62–0.64): 1.0 (1.0).

Gnathosoma ( Figs. 23–24 ). Subcapitulum reticulated, pointed and with two pairs of subcapitular setae, m 35 (28–30) and n 20 (20), two pairs of adoral setae, or1 22 (18), or2 27 (23–25); distances: or1–or1 7 (7–10), or2–or2 22 (18–25), or1–or2 5 (3–5); m–m 30 (28–32), n–n 25 (25–30), or1–m 25 (20), or2–m 24 (21–22), m–n 20 (12–15) ( Fig. 24 ). Chelicerae free 85 (78–80), movable digit 80 (80–90) ( Fig. 23 ). Palpi five segmented, palp tarsus with five simple setae, one solenidion (ω) 10 (7–12), one tridentate eupathidium, palp tibia with two setae plus one well developed claw 21 (18–25) and one accessory claw 7 (5–6), palp genu with two setae, palp femur with three setae. Palp coxa with one elcp seta 5 (6–7) ( Fig. 24 ).

Venter ( Fig. 25 ). Coxisternae I–II and III–IV with polygonal reticulation, separated by transverse striae. Length of ventral setae 1a 28 (25), 1b 34 (28), 1c 36 (30–32), 2b 38 (30–35), 2c 36 (25–35), 3a 27 (22–28), 3b 24 (20–28), 3c 26 (22–25), 4a 30 (20–22), 4b 25 (20–22) and 4c 25 (20–22). Aggenital region with polygonal reticulation and three pairs of setae (ag1–3); anal region with polygonal reticulation and three pairs of pseudanal setae (ps1–3) ( Fig. 25 ). Measurements of setae: ag1 31 (22–26), ag2 26 (25–28), ag3 31 (22–30), g 24 (17–20), g–g 9 (11), ps1 45 (37–42), ps2 32 (28), ps3 26 (25). Distances: ps1–ps1 30 (22–32), ps2–ps2 45 (42–50), ps3–ps3 48 (40–55), ps2–ps3 15 (15–22); ag1–ag1 22 (16–20), ag2–ag2 60 (50–60), ag3–ag3 65 (62–70), ag1–ag2 41 (32–40), ag2–ag3 15 (26–22).

Legs ( Figs. 26–29 ). Length of leg I 292 (270–290); leg II 240 (210–245); leg III 225 (195–230), leg IV 290 (260–270). Setal formulae of leg segments as follows coxae 2+ elcp –2–2–2; trochanters 1–1–2–1; femora 6–5–3–2; genua 3+1 κ –3+1 κ –1–1; tibiae 5+(1 φρ, 1 φ)–5+1 φρ –5+1 φρ –5+1 φρ; tarsi 13+1 ω –9+1 ω –7+1 ω –7+1 ω. Length of solenidia: I ω 30 (30), II ω 25 (24–26), III ω 20 (15–25), IV ω 15 (15). I φ 15 (12–14); I φρ 30 (20–30), II φρ 20 (16–20), III φρ 20 (16–20), IV φρ 20 (15–22); I κ 20 (15–19); II κ 8 (8–11). Coxa I with one elcp seta 7 (7–8) ( Figs. 26–29 ).

Remarks. Stigmaeus delaramae sp. nov. is similar to S. sphagneti ( Hull, 1918) [re–described by Summers (1962)] in having the same leg chaetotaxy, median shield with three pairs of setae and eyes present but it differs by: 1) length of idiosoma 420–460 in former opposed to 370 in the latter; 2) ratio setae d / v” on tibia IV 1.4 in new species but 0.9 in S. sphagneti ; 3) length of macroseta (d) on tibia IV 60 in new species whereas 35 in S. sphagneti ; 4) auxiliary shields smooth in the former but reticulated in the latter; 5) length of dorsal setae c2 65–76; d2 58–69; e2 52 –60; f1 60–68; h1 62–72; h2 63–73 versus c2 52; d2 37; e2 39; f1 43; h1 44; h2 44; 6) seta c2 with fine cilia in the new species while clearly serrated in distal half in S. sphagneti . Also, the new species resembles S. haddadi Zarei & Bagheri, 2012 in having three pairs of setae on the median shield and the same leg chaetotaxy. However it differs by: 1) post ocular body present in the former while absent in the latter; 2) coxisternal shields with polygonal reticulation in the new species whereas smooth in S. haddadi ; 3) anal shield with polygonal reticulation opposed to smooth in S. haddadi ; 4) legs reticulated in the former but smooth in the latter.

Furthermore, Stigmaeus delaramae sp. nov. closely resembles S. livschitzi Kuznetzov, 1977b in having the same leg chaetotaxy and general appearance but it differs by: 1) all dorsal setae serrated in distal half (except setae ve finely serrated) in the former opposed to serrated along entire length in the latter; 2) subcapitulum and coxae I–IV reticulated in the new species whereas smooth in the Russian species; 3) aggenital and anal regions with polygonal reticulation in S. delaramae sp. nov. while smooth in S. livschitzi ; 4) marginal shield well developed and almost 1.5 times the length of dorsal setae d 2 in new species but this shield small and equal in length compared with setae d 2 in S. livschitzi ; 5) palp tibia with two simple setae in the new species but three in S. livschitzi ; 6) length of leg I–II 270–292 and 210–245 in the former opposed to 210 and 180 in the latter; 7) length of IVω 15 vs. 25; 8) length of macrosetae on tibia IV 60 vs. 50; 9) length of body excluding gnathosoma 420–460 vs. 350.

MALE. Unknown.

Etymology. The new species is named in honor of Mrs. Delaram Mazoji, wife of the junior author.

Type material. Holotype female, collected from soil and litter under pear trees, Pyrus communis L. ( Rosaceae ), Yaghob Abad village, Baneh vicinity, (36° 02' N, 45° 44' E and altitude 1475 m above sea level), Kurdistan Province, Iran, 27 ix 2013, S. Nasrollahi; two paratype females with the same data. The holotype female and one paratype slide are deposited in the Collection of the Acarology Laboratory, University of Bu–Ali Sina, Hamadan, Iran and one paratype female will be deposited in the National Collection of Arachnida, Plant Protection Research, Pretoria, South Africa.

Figures

FIGURES 21 – 25. Stigmaeus delaramae sp. nov. (Female): 21. Dorsal view; 22. Dorsal setae (vi, ve, c 1, c 2, d 1, f 1 & h 1); 23. Chelicera; 24. Gnathosoma; 25. Ventral view.

FIGURES 26 – 29. Stigmaeus delaramae sp. nov. (Female): 26. Leg I; 27. Leg II; 28. Leg III; 29. Leg IV.