Azaritrombium raphanicum Saboori, Bagheri & Haddad, 2005

Saboori, Alireza, Bagheri, Mohammad, Nejad, Karim Haddad Irani-, Kamali, Karim & Khanjani, Mohammad, 2005, A new genus and species of Trombidiinae (Acari: Trombidiidae) described from larvae ectoparasitic on aphid from Iran, Zootaxa 1089 (1), pp. 49-56 : 50-53

Azaritrombium raphanicum Saboori, Bagheri & Haddad , sp. n. ( Figs. 1–7 )

Diagnosis. Larva with the following features: fD = 4 (+ 2) ­ 6 ­ 4 ­ 4 ­ 4 = 22 (+ 2); fV = 2 ­ 2 ­ 2 u = 6; fnCx = 2 ­ 2 ­ 1; fnTr = 1 ­ 1 ­ 1; fnFe = 5 5 4; fnGe = 3 ­ 3 ­ 3; fn Ti = 5 ­ 5 ­ 5; fn Ta = 17 ­ 14 ­ 12; fSol = I (0 ­ 2 ­ 2 ­ 1), II (0 ­ 1 ­ 2 ­ 1), III (0 ­ 1 ­ 0 ­ 0); f k = I (1 ­ 1), II (1 ­ 1), III (0 ­ 0); f = 2 ­ 0 ­ 0; f = 1 ­ 1 ­ 0; fPp = 0 ­ 0 ­ 0 ­BBN 2 ­6N; IP = 605; Idiosoma with two dorsal scuta; Tarsus III with developed inner claw; AP <MA; AA subequal to SB.

Description

Holotype larva: Red in colour when alive. Idiosoma oval, dorsal surface with 22 setae, each arising from small sclerite ( Fig. 1 ). Scutum subtriangular, widest at postero­lateral angles, with weakly convex posterior edge. Scutum with punctuation; AM distinctly barbed. PL setae barbed, at postero­lateral angles of scutum. AL setae sparsely barbed, situated close to PL than AM. S barbed on distal half. Scutellum wider than long, with punctations and two sparsely barbed setae each. Anterior border with a constriction at median part. Ocular sclerite, 19 long and 12 wide, situated lateral to postero­lateral angles of scutum; with 2 eyes, anterior 8, posterior 10 in diameter. All dorsal setae barbed.

Ventral surface of idiosoma with 3 pairs of coxae, one pair of intercoxal setae, 3 pair of para­anal setae and anus ( Fig. 2 ). All setae on ventral idiosoma barbed. Coxal fields punctate. Coxa I with proximal seta 1a, 20 long and antero­distal seta 1b, 25 long. Coxa II with one antero­distal seta 2b, 35 long and one proximal 2a, 32 long. Coxa III with single antero­median seta 3b, 35 long. All coxal setae distinctly barbed ( Figs. 5–7 ). One pair of intercoxal setae 3a between coxae III, 25 long. Three pairs of para­anal setae surround anus. Ventral setae located on sclerites slightly smaller than those on dorsal setae. NDV = 24 + 6 = 30.

Gnathosoma acuminate posteriorly ( Fig. 2 ). A pair of adoral setae (or 1) small and nude. One pair of subcapitular setae long, brush­like, 30 long, 7 apart at base. Cheliceral base 40 long; cheliceral blade 10 long, curved with single minute tooth distally. Palpal femur and genu without seta ( Fig. 2 ). Tibia with one nude and two barbed setae ( Figs. 3– 4 ). Palpal tarsus with 6 nude setae and eupathidium. fPp= 0­0­0­BBN 2 ­ 6N. One seta on palpal tarsus long and smooth.

Leg segmentation formula: 6­6­6. Leg setal formula: Leg I: Ta ­ 1, 1, 2, 17B; Ti­ 2, 1, 5B; Ge­ 2, 1, 4B; Fe­ 5B; Tr­ 1B ( Fig. 5 ). Leg II: Ta­ 1, 1, 14B; Ti ­ 2, 5B; Ge­ 1, 1, 3B; Fe­ 5B; Tr­ 1B ( Fig. 6 ). Leg III: Ta­ 12B; Ti­ 5B; Ge­ 1, 3B; Fe­ 4B; Tr­ 1B ( Fig. 7 ). IP= 209 + 191 + 205 = 605 (holotype)

Measurements are given in table 1.

Etymology: The species name is derived from the name of one of its host, Raphannus sativus L. ( Brassicaceae ).

Types: The holotype (ARS­20042228­1a) and 9 paratypes (ARS­20042228­1b to 1i) larvae were collected by M. Bagheri, July 2004, on undetermined aphid on Raphannus sativus L. ( Brassicaceae ) and Onopordon leptolepis Dc. (Astraceae) , in Oskoo, Azarshahr and Shend Abad, East Azarbaijan province, Iran. The holotype and 4 paratypes are deposited in the Acarological Collection, Zoological Museum, College of Agriculture, University of Tehran, Karaj, Iran, two paratypes in the New Zealand Arthropod Collection (NZAC) at Landcare Research, Auckland, New Zealand and others in the Acarological Collection, Department of Plant Protection, College of Agriculture, Tabriz University, Tabriz, Iran.

Remarks: This species is monotypic.

Figures

FIGURE 1. Azaritrombium raphanicum Saboori, Bagheri & Haddad, sp. n. (larva). Idiosoma, dorsal view.

FIGURE 2. Azaritrombium raphanicum Saboori, Bagheri & Haddad, sp. n. (larva). Idiosoma and gnathosoma, ventral view.

FIGURES 3–4. Azaritrombium raphanicum Saboori, Bagheri & Haddad, sp. n. (larva). (3) Palptibia, dorsal view; (4) Palpal tibia and tarsus, ventral view.

FIGURES 5–7. Azaritrombium raphanicum Saboori, Bagheri & Haddad, sp. n. (larva). (5) Leg III, Femur­tarsus; (6) Leg II, Femur­tarsus; (7) Leg I, Femur­tarsus.