Two new species of the genus Elattoma (Acari: Heterostigmatina: Pygmephoridae) phoretic on Morimus verecundus (Coleoptera: Cerambycidae) from Iran Author Rahiminejad, Vahid Author Hajiqanbar, Hamidreza Author Fathipour, Yaghoub text Zootaxa 2011 2903 48 56 journal article 46766 10.5281/zenodo.204757 4dcf02e4-85fc-4faf-b086-762136189154 1175-5326 204757 Elattoma abeskoun Rahiminejad and Hajiqanbar sp. nov. ( Figures 8–14 ) Differential diagnosis. The new species resembles E . cerambycidum sp. nov. but differs from it by solenidion φ2 shorter than φ1, seta f less than two times longer than setae e and seta h 1 bluntly ended and shorter than seta e (solenidion φ2 longer than φ1, seta f more than 3 times longer than setae e and seta h 1 pointed and longer than seta e in E. cerambycidum sp. nov. ). The new species is also closely related to E . kornilovi but differs from it by solenidion φ2 shorter than φ1 (solenidion φ2 longer than φ 1 in E . kornilovi ), seta e longer than h 1 (seta h 1 longer than e in E . kornilovi ), seta f less than two times longer than e (seta f more than two times longer than e in E . kornilovi ), setae h 1 bluntly ended (setae h 1 pointed in E . kornilovi ) and setae c 1 and c 2 subequal (setae c 2 longer than c 1 in E . kornilovi ). Phoretic female. Length of idiosoma 179 (169–182), width 91 (90–97). Gnathosoma ( Figs. 8, 9 ). Gnathosomal capsule subquadrangular, dorsally with a small median apodeme, one pair of cheliceral setae ch 3 (3–4) needlelike and one pair of small postpalpal setae pp located anterolaterally to seta ch ; ventrally with one pair of subcapitular setae su 3 (4–5) needlelike; each palp dorsally with two needlelike setae dFe 3 (3–4) and dGe 2 (2–3), dFe longer than dGe , ventrally with accessory setigenous structure ( ass ), two small solenidia and one tiny rod-shape structure; chelicerae indiscernible; pharyngeal system ( Fig. 10 ) with three pumps, pump 1 smallest, pump 2 the largest and striated, pump 3 oval-shaped. FIGURES 8–10 . Elattoma abeskoun Rahiminejad & Hajiqanbar sp. nov. (female): 8. Dorsum of the body, 9. Venter of the body, 10. Pharyngeal system. Scale bar 50 Μm. Idiosomal dorsum ( Fig. 8 ). Rounded stigmata visible in anterior part of prodorsal shield with conspicuous atria; all dorsal setae smooth and pointed except setae h 1 which are blunt-ended; prodorsal shield with one pair of clavate trichobothria and three pairs of setae v 1 12 (12–13), v 2 8 (6–8) and sc 2 17 (16–18), v 1 longer than v 2 , both shorter than sc 2; all tergites smooth, tergite C with two pairs of setae c 1 21 (20–21) and c 2 21 (19–21), c 1 and c 2 subequal, posterior margin of tergite C concave medially; tergite D with seta d 25 (24–27) and one pair of cupuli ia ; tergite EF with two pairs of setae e 14 (13–14) and f 21 (18–23) and one pair of cupuli im , seta f less than two times longer than seta e ; tergite H with only one pair of setae h 1 12 (10–12) blunt-ended and one pair of cupuli ih ; Distances between dorsal idiosomal setae: v 1– v 1 12 (11–12), v 2– v 2 29 (26–29), sc 2– sc 2 27 (27–30), c 1– c 1 36 (34–38), c 2– c 2 57 (51–60), d–d 40 (40–43), e–e 40 (39–43), f–f 27 (25–28), h 1– h 1 27 (26–27). FIGURES 11–14 . Elattoma abeskoun Rahiminejad & Hajiqanbar sp. nov. (female): 11–14. Legs I–IV, respectively. Scale bar 20 Μm. Idiosomal venter ( Fig. 9 ). Ventral plates smooth; all ventral setae smooth and pointed except setae ps 1 and ps 2 which are needlelike. Apodemes 1 and 2 reaching to presternal apodeme (appr), sejugal apodeme (apsej) not reaching to appr, no apodemes III and V, apodeme IV vestigial, poststernal apodeme (appo) very short; posterior border of poststernal plate bi-parties; epimeres I with three pairs of setae 1 a 9 (7–9), 1 b 9 (7–9) and 1 c 10 (10–10), all subequal; epimeres II with two pairs of setae 2 a 11 (11–12) and 2 c 12 (12–13), 2 a and 2 c subequal; epimeres III with three pairs of setae 3 a 8 (8–10), 3 b 9 (8–9) and 3 c 10 (8–10), all subequal; epimeres IV with only one pair of seta 4 b 12 (11–12); tergite PS with two pairs of setae ps 1 7 (6–8) and ps 2 4 (3–4). Legs. Leg I ( Fig. 11 ) thicker and shorter than other legs; setal formula: Tr1-Fe4-Ge2-TiTa17(2) (number of solenidia in parenthesis). Tibiotarsus with one large claw; solenidion φ1 6 (5–6) prominent and finger shaped; solenidion φ2 3 (3–4) finger shaped, φ2 shorter than φ1, with 6 eupathidial setae ( p’ , p” , ft’ , ft” , tc’ and tc” ) bluntly ended, setae pl’ and pl” whip-like, pl’ longer than pl” , setae d whip-like and longest on leg I and less than two times longer than pl’ , seta v” more than two times longer than v’ , seta l’ longer than l” ; genu with seta l” longer than l’ , seta l’ needlelike; femur with seta d hook-like, seta l” longer than l’ , seta l’ needlelike, seta v” sparsely barbed and longer than l’ and l” ; trochanter with seta v’ sparsely barbed. Leg II ( Fig. 12 ). Setal formula: Tr1-Fe2-Ge1-Ti4(1)-Ta6(1). Solenidion ω 3 (3–4) finger shaped, anterior to modified and spatulate seta pl” , seta pv” spine like, seta tc” whip-like and more than two times longer than tc’ , seta u’ needlelike, sometimes indiscernible in some species; tibia with one small finger shaped solenidion φ 2 (2–4), setae d and v” subequal, seta l’ needlelike and subequal to length of its segment; genu with only one seta l’ ; femur with seta d shorter than v” ; trochanter with seta v’ weakly barbed. Leg III ( Fig. 13 ). Setal formula: Tr1–Fe1–Ge1–Ti4(1)–Ta6. Tarsus with seta pl” spatulate, setae pv” spine, seta u’ needlelike, seta tc” whip–like and longest one on leg III; tibia with a small solenidion φ 2 (1–2), and four setae which setae d , l’ and v’ distinctly longer than seta v” ; genu with seta l’ needlelike, longer than seta d on femur; femur divided into basifemur and telofemur, seta d needlelike and inserted on telofemur; seta v’ on trochanter smooth. Leg IV ( Fig. 14 ). Ambulacrum stalked; setal formula: Tr1-Fe2-Ge0-Ti3(1)-Ta6. Tarsus with seta pl” short, behind wipe-like and ultralong seta tc” ; seta u’ blunt-ended; seta pv” longer than pv’ , both shorter than tc’ ; tibia with small solenidion φ 1 (1-1), seta d and v’ subequal and both longer than v” ; genu with no seta; femur divided into basifemur and telofemur, setae d and v’ inserted on telofemur, seta v’ almost two times longer than d ; trochanter with seta v’ smooth. Male and larva unknown. Type material. Holotype female (1/1) phoretic on Morimus verecundus ( Coleoptera : Cerambycidae ) clinging to ventral surface, around coxae I–III, collected from Oak trees in Nokandeh forest, Golestan province, northern Iran , 36.41°N , 53.54°E , altitude 381 m . , coll. V. Rahiminejad, 26 August 2009 . Paratypes : more than 150 females , same collection data as holotype . Etymology. The name of new species “ abeskoun ” is derived from one of the ancient names of the Caspian Sea to the northwest of the sampling site (Golestan province).