Elattoma cerambycidum Rahiminejad & Hajiqanbar, sp. nov.

• Main Authors: Rahiminejad, Vahid, Hajiqanbar, Hamidreza, Fathipour, Yaghoub
• Format: Text
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Prostigmata; Pyemotidae; Elattoma; Elattoma cerambycidum; Seta; Vestnik; North-West Russia
• Online Access: https://dx.doi.org/10.5281/zenodo.5677139; https://zenodo.org/record/5677139

Elattoma cerambycidum Rahiminejad & Hajiqanbar sp. nov. (Figures 1–7) Differential diagnosis. The new species is close to E . kornilovi Khaustov, 2000 but differs from it by seta f more than three times longer than seta e (seta f two times longer than seta e in E . kornilovi ) and seta c 1 longer than seta c 2 (seta c 1 shorter than seta c 2 in E . kornilovi ). The new species is also resembles E . abeskoun sp. nov. but differs from it by solenidion φ 2 longer than φ 1 (solenidion φ 2 shorter than φ 1 in E . abeskoun ), seta e shorter than h 1 (seta e longer than h 1 in E . abeskoun ), seta f more than three times longer than e (seta f less than two times longer than e in E . abeskoun ) and setae h 1 pointed (setae h 1 blunt-ended in E . abeskoun ). Phoretic female. Length of idiosoma 172 (169–179), width 89 (83–91). Gnathosoma (Figs. 1, 2). Gnathosomal capsule subquadrangular, dorsally with a median small apodeme, one pair of cheliceral setae ch 2 (2–3) needlelike and one pair of small postpalpal setae pp located anterolaterally to setae ch ventrally with one pair of subcapitular setae su 4 (4–5) needlelike; each palp dorsally with two needlelike setae dFe 2 (2–3) and dGe 3 (3–4), dGe longer than dFe , ventrally with accessory setigenous structure ( ass ), two solenidia and one tiny rod-shape structure; chelicerae indiscernible; pharyngeal system (Fig. 3) with three pumps, pump 1 smallest, pump 2 the largest and striated, pump 3 oval-shaped. Idiosomal dorsum (Fig. 1). Rounded stigmata visible in anterior part of prodorsal shield with conspicuous atria; all dorsal setae smooth and pointed; prodorsal shield with one pair of capitate trichobothria and three pairs of setae v 1 20 (18–20), v 2 12 (11–12) and sc 2 22 (22–23), seta v 1 longer than seta v 2, both shorter than seta sc 2; all tergites smooth, tergite C with two pairs of setae c 1 25 (24–26) and c 2 22 (22–23), seta c 1 longer than c 2, posterior border of tergite C slightly concave medially; tergite D with setae d 25 (24–27) and one pair of cupuli ia tergite EF with two pairs of setae e 8 (7–8) and f 27 (26–27) and one pair of cupuli im , seta f more than 3 times longer than seta e tergite H with only one pair of setae h 1 14 (13–15) and one pair of cupuli ih Distances between dorsal idiosomal setae: v 1 – v 1 11 (11–13), v 2 – v 2 35 (35–37), sc 2 – sc 2 32 (30–34), c 1 – c 1 37 (36–37), c 2 – c 2 61 (58–62), d–d 44 (43–47), e– e 44 (44–47), f–f 33 (31–34), h 1 – h 1 29 (26–31). Idiosomal venter (Fig. 2). 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 11 (10–12), 1 b 4 (4–5) and 1 c 12 (11–12), 1 b shortest, 1 a and 1 c subequal; epimeres II with two pairs of setae 2 a 9 (8–10) and 2 c 10 (8–11), 2 a and 2 c subequal; epimeres III with three pairs of setae 3 a 13 (13–15), 3 b 13 (10–13) and 3 c 12 (11–13), all subequal; epimeres IV with only one pair of seta 4 b 11 (10–11); tergite PS with two pairs of setae ps 1 6 (6 - 6) and ps 2 5 (4–5). Legs. Leg I (Fig. 4) thicker and shorter than other legs; setal formula: Tr 1 -Fe 4 -Ge 2 -TiTa 17 (2) (number of solenidia in parenthesis). Tibiotarsus with one large claw; solenidion φ 1 5 (5–6) prominent and finger shaped; solenidion φ 2 7 (7–8) uniformly thin, φ 2 longer than φ 1, with six eupathidial setae ( p’ , p” , ft’ , ft” , tc’ and tc” ) bluntly ended, tc’ and tc” on pinnaculum, setae pl’ and pl” whip-like, setae d whip-like and longest on leg I and almost two times longer than pl’ , seta v” more than two times longer than v’ , seta l’ twice as long as l” genu with seta l” longer than l’ femur with seta d hook-like, seta l” longer than l’ , seta v” sparsely barbed and longer than l’ and l” trochanter with seta v’ sparsely barbed. Leg II (Fig. 5). Setal formula: Tr 1 -Fe 2 -Ge 1 -Ti 4 (1)-Ta 6 (1). Solenidion ω 4 (4 - 4) finger shaped, anterior to modified and spatulate seta pl” , seta pv” spine like, seta tc” whip-like and approximately three times longer than tc’ , seta u’ needlelike, sometimes indiscernible in some species; tibia with a small finger shaped solenidion φ 2 (2– 3), setae d and v” subequal, seta l’ needlelike and shorter than length of its segment; genu with only one seta l’ needlelike; femur with seta d needlelike, shorter than v” trochanter with seta v’ weakly barbed. Leg III (Fig. 6). Setal formula: Tr 1 -Fe 1 -Ge 1 -Ti 4 (1)-Ta 6. Tarsus with seta pl” spatulate, setae pv” spine like, seta u’ needlelike, seta tc” whip-like and longest; tibia with a small solenidion φ 1 (1–2) and four subequal setae; genu with seta l’ almost three times 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. 7). Ambulacrum stalked; setal formula: Tr 1 -Fe 2 -Ge0-Ti 3 (1)-Ta 6. Tarsus with seta pl” short, behind wipe-like and ultralong seta tc” seta u’ blunt-ended; setae pv’ and pv” subequal, both shorter than tc’ tibia with small solenidion φ 1 (1–2), seta d longer than setae v’ and v” genu with no seta; femur divided into basifemur and telofemur, setae d and v’ inserted on telofemur, seta v’ more than two times longer than d trochanter with seta v’ smooth. Male and larva unknown. Type material. Holotype female (15 / 1) phoretic on Morimus verecundus (Coleoptera: Cerambycidae) clinging to ventral surface, around coxae I–III, collected from Oak trees in Naharkhoran forest, Golestan province, northern Iran, 36.46°N, 54.27°E, altitude 450 m., coll. V. Rahiminejad, 26 June 2009. Paratypes: more than 150 females, same collection data as holotype. Etymology. The name of the new species refers to its host family name, Cerambycidae. : Published as part of Rahiminejad, Vahid, Hajiqanbar, Hamidreza & Fathipour, Yaghoub, 2011, Two new species of the genus Elattoma (Acari: Heterostigmatina: Pygmephoridae) phoretic on Morimus verecundus (Coleoptera: Cerambycidae) from Iran, pp. 48-56 in Zootaxa 2903 on pages 49-50, DOI: 10.5281/zenodo.204757 : {"references": ["Khaustov, A. A. (2000) Mites of the genus Elattoma (Acariformes: Pygmephoridae) from Crimea and North-West Russia. Vestnik Zoologii, 34 (1 - 2), 77 - 83."]}