Caligonella saboorii n.

Ahmad Hoseini, M., Khanjani, M. & Javadi Khederi, S., 2014, Caligonella Saboorii N. Sp. (Acari: Trombidiformes: Caligonellidae) From Western Iran, Acarologia 54 (4), pp. 473-478 : 474-477

Caligonella saboorii n. sp. Ahmadhoseini and Khanjani

( Figs. 1 - 2 )

Diagnosis — Dorsal and venter of idiosoma without shield; outer solenidion on tibia I two times longer than inner one; solenidia on tarsi I and II and outer solenidion on tibia I are equal in length; dorsum with three pairs of cupules.

Female (n = 4) — Measurements of holotype: total length of body (including gnathosoma) 420 (400 – 415), length of body (excluding gnathosoma) 315 (305 – 320), width 180 (170 – 185).

Dorsum ( Fig. 1a ) — Dorsal integument entirely with simple striations, prodorsum without shield and with 11 pairs of subequal setae; one pair of eyes and a pair of post ocular bodies (Pob) present laterally between setae sci and sce. Integument with three pairs of dorsolaterally cupules, ia located behind post ocular bodies, im antero-lateral to setae d1 and ip potero-lateral to setae f1, anal opening posteriorly, with one pair of pseudanal setae (ps1). All dorsal setae are simple, length of dorsal setae as follows: vi 20 (18 – 20), ve 26 (24 – 25), sci 22 (20 – 22), sce 20 (19 – 21), c1 20 (18 – 21), c2 20 (19 – 20), d1 18 (19 – 20), e1 18 (17 – 18), f1 = h1 = h2 18 (17 – 18); distances between dorsal setae: vi–vi 27 (24 – 28), ve–ve 120 (116 – 125), vi–ve 63 (58 – 65), sci–sci 49 (48 – 53), sce–sce 175 (155 – 180), sci–sce 85 (80 – 87), ve–sci 34 (27 – 36), c1–c1 35 (29 – 32), c1–c2 50 (46 – 52), c2–c2 124 (117 – 127), c1–1 52 (47 – 54), d1–d1 50 (52 – 55), d1–e 40 (37 – 40), e1–e1 75 (68 – 74), e1–f1 50 (43 – 51), f1–f1 63 (57 – 68), f1–h1 30 (28 – 30), f1–h2 31 (28 – 32), h1–h1 24 (21 – 23), h1–h2 29 (27 – 30), h–h2 52(43 – 47). The ratio of dorsal setae as follows: vi/vi–vi 0.74 (0.75 – 0.89), c1/c1–c1 0.57 (0.62 – 0.65), d1/d1–d1 0.36 (0.36 – 0.36), e1/e1– e1 0.24 (0.22 – 0.25), f1/f1–f1 0.26 (0.25 – 0.29), h1/h1–h1 0.75 (0.73 – 0.80), h2/h2– h2 0.35 (0.38 – 0.39), h1/h2 1.00 (0.94 – 1.00), c1–c1: d1–d1: e1–e1: f1–f1:(0.47 – 0.55): (0.79 – 0.91): (1.08 – 1.19): (1.00).

Gnathosoma ( Figs. 1 b-c) — Chelicerae with proximal components completely fused in midline, forming bullet-shaped stylophore; peritremes confined to dorsal surface of stylophore, with 24–26 chambers on each side (Fig. 3). Palpi five segmented, palp tarsus distally with four eupatidia + one solenidion 5 (4 – 5) long + three setae, palp tibia with three setae and one small claw 6 (5 – 6); palpgenu and palpfemur each with one seta ( Fig. 2 ). Subcapitular setae m 35 (34 – 36), n 13 (13 – 15) long, adoral setae or1 10 (9 – 10), or2 11 (9 – 10); m–m 30 (28 – 35), n–n 12 (12 – 14) and m–n 18 (18 – 20), or1– or1 20 (19 – 20), or2–or2 18 (20 – 21), or1–or2 8 (7 – 9) ( Fig.2 ).

Venter ( Fig. 1d ) — Ventral surface striated and three pairs of simple setae present, 1a located on coxae I but 3a and 4a located on integument, genital valves without seta, and aggental region with three pairs of setae (ag1–3), one pair of cupules (ih) located lateral to setae ag2 (Fig. 4). Length of ventral setae as follows: la 28 (30 – 31), 1b 25 (23 – 26), 1c 27 (24 – 26); 2c 19 (18 – 20), 3a 28 (28 – 29), 3b 20(17 – 21), 4a 22 (20 – 21), 4b 21 (20 – 22), ag1 22 (21 – 24), ag2 16 (17 – 18), ag3 14 (13 – 15). Distances: ag1–ag1 60 (55 – 63), ag2–ag2 32 (28 – 31), ag3–ag3 43 (38 – 45), ag1–ag2 65 (63 – 68), ag2–ag3 29 (30 – 32). Anal valves in dorsal position and with one pair of setae ps1 15 (14 – 16).

Legs ( Figs. 2 ) — Leg measurements are from coxa to pretarsus; leg I 280 (270 – 285); leg II 212 (210 – 215); leg III 220 (212 – 226), leg IV 253 (245 – 250); Setal formulae of leg segments as follows: coxae 3-1-2-1; trochanters 1-1-1-1; femora 2-2- 2-2; genua 5+1 κ -5-2-2; tibiae 5+1 ’ +1 ’ρ -5-4-4; tarsi 15+1 ω -11+1 ω - 9 - 9 (Figs. 5-8). Outer solenidion of tibia I (’ρ) 11 (10 – 11) twice as long as inner solenidion (’) 5 (4 – 5); solenidion on tarsus I 10 (10 – 11), solenidion on tarsus II 10 (10 – 10).

Differential diagnosis — Caligonella saboorii n. sp. resembles C. haddadi and C. humilis by having the same leg setal formulae but differs from C. haddadi by three main characters: (1) the length of dorsal setae in new species (17 – 26) longer than those C. haddadi (14 – 17); (2) the outer solenidion of tibia I two times as long as inner solenidion in C. saboorii n. sp. instead of three times longer than inner solenidion in C. haddadi ; (3) the outer solenidion on tibia I (10 – 11), solenidion on tarsus I (10 – 11) and solenidion on tarsi II (10 – 10) are equal in length in new species whereas outer solenidion on tibia I (15 – 16), longer than solenidion on tarsus I (11 – 12) and solenidion on tarsus II (10 – 10) in C. haddadi . The new species shares with C. humilis the identical setal formulae of legs and one pair of pseudanal setae but can readily be distinguished from the latter by: (1) the length of dorsal setae in new species (17 – 26) longer than those C. humilis (13); (2) the outer solenidion on tibia I and solenidion on tarsus I are equal in length versus outer solenidion on tibia I shorter than solenidion on tarsus I in C. humilis ; (3) The solenidion on tarsus I and solenidion on tarsus II are equal in length in the new species whereas two times longer than on tarsus II in C. humilis .

Type materials — The holotype female and three paratype females were collected from soil and litter under Walnut tree, Juglans regia L. ( Juglandaceae ) in Khorramabad vicinity Lorestan province (33°56’N, 48°39’E, a.s.l. 1703 m), 8 July, 2012, by Mohammad Ahmad Hoseini. The holotype female and two paratype females are deposited in the Collection of the Acarology Laboratory, University of Bu- Ali Sina , Hamedan, Iran. One paratype female, will be deposited in the mite Section of National Collection of Arachnida, Plant Protection Research Institute, Pretoria, South Africa.

Etymology — This species is named in honor of Prof. Alireza Saboori, Department of Plant Protection, College of Agriculture, Tehran University, Karaj, Iran.

Figures

FIGURE 1: Caligonella saboorii n. sp. (Female): a – Dorsal view, b – Gnathosoma, c – Peritreme, d – Ventral view.

FIGURE 2: Caligonella saboorii n. sp. (Female): a – Leg I, b – Leg II, c – Leg III, d – Leg IV.