Stigmaeus ueckermanni, Yali, Maryam Pahlavan, Khanjani, Mohammad & Razmjou, Jabraeil, 2011

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 : 61-64

Stigmaeus ueckermanni sp. nov.

( Figs. 1–9 ).

Diagnosis (Female). Prodorsal shield reticulated centrally, dorsum with 14 pairs of setae, coxa IV with two setae, trochanter III with two setae, femur IV with four setae, three pairs of aggenital setae, two dorsal hysterosomal setae c1 25 (29); distance of vi/vi - vi 0.55 (0.56), c1 / c1 - c1 0.49 (0.37); c1 - c1: d1 - d1: e1 - e1: f1 - f1 0.1.0 (0.98): 0.72 (1.0): 0.67 (069): 1.0.

FEMALE (n = 2). Color in life red. Idiosoma oval. Measurements: Length of body (excluding gnathosoma) 580 (590); width 310 (290); length of leg I 227 (247); leg II 175 (180); leg III 172 (190), leg IV 220 (224).

Dorsum ( Fig. 1 ). Prodorsal shield almost oblong and reticulated centrally; with three pairs of setae (vi, ve, sci), no eyes ( Fig. 1 ); opisthosoma with four paired and two unpaired shields (median and suranal) ( Fig. 1 ). Seta c2 situated ventro-laterally between coxae II-III. Setae vi / ve 0.79 (1.0) almost as long as setae vi, seta sce on lateral propodosomal shield; lengths of dorsal setae: vi 22 (25), ve 28 (25), sci 25 (26), sce 29 (32), c1 27 (30), c 2 38 (43), d1 22 (25), d2 22 (24), e1 27 (25), e2 24 (28), f1 29 (30), h1 32 (35), h2 42(41), h3 20 (27); distances between dorsal setae: vi - vi 40 (45), ve - ve 77 (76), vi - ve 34 (38), sci - sci 106 (110), sci - sce 41 (38), sce - sce 185 (190), ve - sci 46 (50), c1 - sci 85 (103), c2 - sce 95 (99), c1 - c1 76 (78), c1 - c2 115 (98), c2 - c2 279 (275), c1 - d1 80 (81), d1 - d1 55 (58), d1 - d2 62 (60), d1 - e 1 73 (68), d1 - e 2 85 (79), d2 -d2 83 (85), e1 - e 1 51 (55), e2 - e2 175 (170), e1 - e 2 60 (64), d1 - e 2 79 (85), d2 - e 2 82 (84), e1 - f1 41 (43), f1 - f1 76 (80), f1 - h1 65 (59), h1 - h1 40 (42), f1 - h2 65 (59), h2 - h2 80 (75-86), h3 - h3 113 (117), h2-h3 13 (15); ratio: vi/vi - vi 0.55 (0.56), c1 / c1 - c1 0.49 (0.37), d1 / d1 - d1 0.40 (0.46), e1 / e1 - e 1 0.51 (0.45), f1 / f1 - f1 0.38 (0.37), h1 / h1 - h1 0.8 (0.88), h2/h2 - h2 0.51 (0.51), h3/h3 - h3 0.17 (0.24), h2/h3 2.1 (0.81), h1/h2 0.76 (1.56) c1 - c1: d1-d1: e1 - e1: f1 - f1 0.1.0 (0.98): 0.72 (1.0): 0.67 (0.69): 1.0.

Venter ( Fig. 5 ). Venter with diagonal striae between coxae II–III; coxae I–II and III–IV surrounded by longitudinal striae ( Fig. 5 ). Length of setae la 25 (28), 1b 27 (28), 1c 32 (38), 2b 43 (38), 2c 32 (35), 3a 30 (31), 3b 26 (25), 3c 22(25), 4a 28 (25), 4b 20 (21) and 4c 20 (19). Aggenital (ag1-4) setae ag1 as long as ag2,-3; and pseudanal seta ps1 shorter than ps2 - 3; measurements of setae: setae ag1 18 (18), ag2 21 (20), ag3 21 (22), ag4 25 (28), g1 26 (30), g2 23 (30), ps1 21 (25), ps2 33 (35), ps 3 31 (24). Distances: ag1 - ag1 27 (29), ag2 - ag2 42 (45), ag3 - ag3 55 (56), ag4-ag4 58 (67), ag1-ag2 12 (15), ag2-ag3 40 (38), ag3-ag4 15 (18), g1-g1 6(7), g2-g2 10 (10), g1 - g2 21 (25), ps1 - ps1 50 (35), ps2 - ps2 53 (45), ps3 - ps3 40 (23), ps2 - ps3 20 (21).

Gnathosoma ( Figs. 2-4 ). Subcapitulum with two pairs of subcapitular setae, m 19 (25) and n 26 (29), two pairs of adoral setae, or1 9 (7), or2 10 (8); distances: or1 - or1 12 (12), or2 - or2 16 (20), or1- or2 2 (3), m- m 41 (40), n-n 30 (40), or1- m 32 (33), or2 - m 34 (36), m - n 9 (8) ( Fig. 4 ). Chelicerae free 70 (65), movable digit 28 (25). Chelicera depicted in Fig. 2 . Palpi five segmented, palp tarsus with four simple setae + one simple eupathidion + one three - tined eupathidion 8 (9) + one solenidion (ω) 8 (9), palp tibia with one well developed claw + one accessory claw + two simple setae, palp genu with one setae, palp femur with three setae and palp coxae with ε p seta 3 (4) ( Fig. 3 ).

Legs ( Figs. 4-7 ) - Legs about half length of body. Setal formulae of leg segments as follows (with solenidia, in parenthesis): coxae 2 + (1ε p) - 2 - 2 - 2; trochanters 1 - 1 - 2 - 1; femora 4 - 4 - 3 - 2, genua 3 + 1ĸ - 3 + 1ĸ - 2 - 2; tibiae 5 + 1φρ + 1φ-5+1φρ - 5 + 1φρ - 5 + 1φρ; tarsi 13 + 1ω - 8 + 1ω - 7 + 1ω -7 + 1ω. Length of solenidia: I ω 19 (22), II ω 14 (15), III ω 12 (13), IV ω 7 (9). Coxa I possesses supracoxal spine-like seta 1ε p 4 (4) long.

Discussion. Stigmaeus ueckermanni sp. nov. is similar to S. reductus Barilo, 1986 in the shape of the prodorsal shield, suranal shield, presence of seta h3, setal formula of femora and the number of median opisthosomal setae. However, it can easily be differentiated by: median opisthosomal shield in S. ueckermanni reticulated medially but smooth in S. reductus ; trochanter III with two setae in S. ueckermanni compared with one in S. reductus ; setal count of genua 5 + (ĸ) - 4 + (ĸ) - 2 - 2 in the first species but 3 + (ĸ) - 3 + (ĸ) - 2 - 2 in the second species; tibia II with 8 + (ω) in the new species opposed to 9 + (1ω) in S. reductus ; intercalary and lateral opisthosomal shields smooth in the former whereas faintly polygonal in the latter; seta c2 38 (43) long in S. ueckermanni but 20 (22) in S. reductus ; sce 29 (32), c1 27 (30), e1 27 (25), f 1 29 (30), h1 32 (35) vs sce, f 1, h1 = 20 - 22; c1, e1 = 16–18.

Etymology. This species is named in honor of Prof. Edward A. Ueckermann, ARC - Plant Protection Research Institute, Pretoria, distinguished and well known Acarologist of the world and also for his kind assistance to Iranian Acarologists in the past two decades, especially with the junior author.

Material examined. Holotype female, 11 April 2011, collected from soil, Heyran road, Ardabil, Aldabil, Iran province (38° 26ʹ 85ʹ E, 48° 34ʹ 28ʹ N, 1316 a.s.l.). One paratype female with the same data. Both holotype and paratype female of the new species are preserved as slide-mounted specimens. The holotype is 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 1 – 5. Stigmaeus ueckermanni sp. nov. (Female): 1. dorsum, 2. chelicerae, 3. Palp, 4. subcapitulum, 5. venter.

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