Insectolaelaps latopini

Insectolaelaps latopini (Hirschmann & Wiśniewski, 1982) (Figures 28–36) Insectolaelaps pini (Hirschmann, 1960).— Shcherbak, 1980: 196 (only female). Misidentification. Dendrolaelaps (Insectolaelaps) latopini Hirschmann & Wiśniewski, 1982: 36. Dendrolaelaps (Insectolaelaps) latopini.— Wiśniewski, 1984: 120. Diagnosis Idiosoma suboval, with setae mostly thin and short, similar in length; setae r2 and r3 on soft integument in deutonymph. Dorsal and ventral shields reticulate and densely micropunctate, at least in lateral parts. In females sternal setae st3 somewhat thicker than others, with conspicuously adjacent bases. Genital shield with a small marginal notch in posterolateral corner. Ventrianal shield with four pairs of opisthogastric setae (Jv1–Jv3, Zv2), widened in anterior part, with distinct punctation near anus. Peritremes of adults short and not reaching anterior margins of coxae III. Movable cheliceral digit with six to seven teeth in females and five to six teeth in deutonymphs; male spermatodactyl thin, curved and almost as long as movable chela. Genu III and tibia III with seven setae each and only one anterolateral seta; genu IV and tibia IV without conspicuously elongated dorsal setae. Male legs II and IV spurred, as in Figs 34A–D; subapical spur of tarsus II unusually robust, with rounded apex. Redescription Female (Figs 28A, 29–31A, 31C, 32A, 32D, 33A, 34E, 36B, 36C). Dorsal idiosoma (Fig. 29). Idiosoma 450–575 μm long, 270–345 μm wide (n = 10), dorso-ventrally flattened, elongate, suboval, largely covered by two dorsal shields. Podonotal shield 220–275 μm long, 250–320 μm wide, semicircular, convex anteriorly, moderately curved laterally and almost straight or slightly convex posteriorly, with four small and rounded medial scleronodules between setae j5 and j6, very fine punctation on weakly reticulate surface and 22 pairs of setae (j1–j6, z1–z6, s1–s6, r2–r5), of which r3 usually located ventrally on peritrematal part of the shield. Opisthonotal shield 240–305 μm long, 235–315 μm wide, semicircular, widest at level between setae S1 and S2, with straight to slightly convex anterior margin, curved lateral margins slightly expanded ventrally, well-rounded posterior margin, punctate-reticulate surface (reticulation better indicated in anterolateral areas between setae J1–J3 and Z1–Z3 and predominated by transverse lines at level between setae J3 and J4), and a curved row of dots between setae Z5; 20 pairs of opisthonotal setae, of which only R 1 is located on the soft integument outside the shield. Most dorsal setae relatively short and thin, needle-like and similar in length, except for short setae z1, R 1, R 2 and J5, and elongate whip-like setae Z5 and S5. Lengths of selected dorsal setae: j1, j5 and j6 20–26 μm, j2 and j4 25–31 μm, j3 29–35 μm, z1 13–17 μm, z5 23–28 μm, s1 19 –24 μm, s5, s6 and r3 28–35 μm, J1–J4 20–26 μm, J5 11–15 μm, Z1–Z3 29–36 μm, Z4 20–25 μm, Z5 90–110 μm, S1– S4 27 –35 μm, S5 105–135 μm, R 1 and R 2 10–15 μm, R 3 14–18 μm, R 4 19–24 μm, R 5 27–36 μm. Ventral idiosoma (Figs 28A, 30, 31A, 32A). Tritosternum normal for the genus. Presternal plates weakly sclerotized, transversely striate and separately connected to anterolateral margins of sternal shield (Fig. 31A). Sternal shield 78–97 μm long in its better sclerotized part, 75–90 μm wide at the narrowest part between coxae II, with well-developed anterolateral and lateral corners, undulate and slightly concave anterior and well concave posterior margins; surface completely and finely punctate like other ventrally located scutal structures, with reticulation better indicated in marginal areas and usually absent in posteromedial part; four pairs of sternal setae (st1–st4) and three pairs of slit-like lyrifissures (iv1–iv3), of which st1 located on weakly sclerotized anterior part of shield; sternal setae st1–st4 similar in length, but st3 slightly thicker than others (Fig. 30), with following distances between them: st3↔ st3 (28–39 μm) <st1↔st1 (62–71 μm) <st2↔st2 (74–86 μm) ≤ st4↔st4 (78–98 μm). Epigynal shield elongate, 105–135 μm long, 83–112 μm at widest point behind genital setae (st5) and 54–69 μm at narrowest point in anterior part between coxae IV, with convex hyaline anterior margin reaching level of setae st4, straight lateral margins, straight to slightly convex posterior margin, a pair of small incisions in posterolateral corners, faint reticulate pattern predominated by longitudinal lines in anterior and posterolateral parts, and a pair of setae on posterolateral margins (Fig. 30); genital lyrifissures (iv5) on soft integument near posterolateral corners of shield. Ventrianal shield (Fig. 32A) longer than wide, 167–235 μm long and 120–172 μm wide, convex anteriorly and posteriorly, concave laterally, conspicuously widened in anterior part and moderately narrowed posteriorly, with a slight notch near bases of Jv1, four pairs of opisthogastric setae (Jv1–Jv3, Zv2; of which Jv1 and Zv2 on shield margin) and three circumanal setae; almost entire surface reticulate, except for punctate area in posteriormost part near anus; circumanal setae similar in length (ad 29–40 μm, pa 26–36 μm); posterior margin connected to opisthonotal shield; cribrum with two transverse rows of denticles. Endopodal platelets III/IV free, small and subtriangular. Exopodal platelets fused into a narrow strips, free of peritrematal shields except for their posterior tips. Peritrematal shields narrow, free over almost entire length including poststigmatic part, connected to podonotal shield between setae r2 and r3; peritremes short, 71–117 μm long, with anterior tip between setae r4 and r5. Two pairs of metapodal platelets present; larger platelets narrow and long, usually 28–46 μm long, fusiform, with anterior and posterior angles bluntly pointed and a wormlike appendage connected to anterior margin; smaller platelets minute, slit-shaped. Soft opisthogastric integument with three pairs of setae (Jv5, Zv1, Zv3). All sternal and opisthogastric setae similar to those on dorsum, except for slightly thicker st3, with following lengths: st1 24–31 μm, st2 and st3 22–29 μm, st4 20–27 μm, st5 24–28 μm, Jv1 19–25 μm, Jv2 22–27 μm, Jv3 25–33 μm, Jv5 35–45 μm, Zv1 18–23 μm, Zv2 and Zv3 22–30 μm. Sperm induction system (Fig. 31C). Normal for genus, with a pair of well-sclerotized spherical structures, each adjacent to inner margin of coxa IV and bearing two tubular projections; projection often variously curved, only rarely straight as in Fig. 31C, somewhat thicker in basal part and 30–55 μm long. Gnathosoma (Figs 32D, 33A, 36B, 36C). Deutosternal furrow normal for genus, with five transverse rows of many denticles connected laterally by slightly undulate longitudinal lines (Fig. 32D); posteriormost row widest and extending beyond longitudinal lines; corniculi well sclerotized and spaced, horn-like, divergent to each other; internal malae apically pointed, with densely fimbriated outer margins and reaching beyond corniculi. Hypostomal setae smooth and needle-like, usually with attenuated apical part in h1 and h3; setae h2 shortest and h3 longest (h1 35–43 μm, h2 12–17 μm, h3 46–56 μm, pc 22–30 μm). Middle article of chelicerae relatively short and broad, with similar width along entire length, 125–138 μm long (Fig. 33A); digits relatively robust, movable digit 52–59 μm long, with well-developed terminal hook and six, more often seven teeth (rarely eight teeth), including the largest and most proximal one; fixed digit with bidentate terminal hook, one distal tooth and laterally located row of three larger medial teeth, followed by usually 3–5 smaller proximal teeth; pilus dentilis short and thin; dorsal cheliceral seta short, hyaline and barely observable; arthrodial membrane well developed, usually with a row of several spines near ventral base of movable digit. Anterior margin of epistome triramous; all processes thin and similar in size, slightly spatulate and spiny in their apical part (Figs 36B, 36C). Legs (Figs 28A, 34E). All legs shorter than idiosoma, with well-developed pretarsus and ambulacral apparatus including pulvillus and two claws; pulvillus and claws of legs I smaller than those of other legs; legs I longer or similar in length to legs IV; dorsal scutal surface of coxae I obliquely cleft, with interspace of soft cuticle (Fig. 28A) and a row of several denticles on anterior margin; anterior margin of coxae II with a sharp spine; legs I 365–415 μm, legs II 295–355 μm, legs III 265–315 μm, legs IV 330–410 μm long. Chaetotaxy of the legs: leg I—coxa (2), trochanter 1-1/3-1 (6), femur 2-3/1, 2/3-2 (13), genu 2-3/2, 2/1-2 (12), tibia 2-3/2, 2/1-2 (12); leg II—coxa (2), trochanter 1-0/3-1 (5), femur 2-3/1, 2/2-1 (11), genu 2-3/1, 2/1-2 (11), tibia 2-2/1, 2/1-2 (10); leg III—coxa (2), trochanter 1-1/3-0 (5), femur 1-2/1, 1/0-1 (6), genu 1-2/1, 2/0-1 (7), tibia 1-1/1, 2/1-1 (7); leg IV—coxa (1), trochanter 1-1/3-0 (5), femur 1-2/1, 1/0-1 (6), genu 1-2/1, 2/0-1 (7), tibia 1-1/1, 2/1-1 (7); tarsi II–IV with 18 setae; genu III with only seven setae (al2 and pv1 absent), tibia III with only seven setae (al2 absent). Leg setae smooth and thin, mostly needle-like, except for some slightly thickened dorsal setae of femora II–IV and genua III–IV, including spine-like seta pd2 on genua III and IV (Fig. 34E), conspicuously shortened and thickened apicoventral setae (av1, pv1) on tarsi II–IV, elongated and distally attenuated whip-like setae ad2 on tarsi II–IV (ad2 unusually oriented perpendicular to tarsal axis). Male (Figs 28B, 31B, 31D, 32E, 33B, 34A–D, 36D, 36E). Idiosoma 405–535 μm long, 245–350 μm wide (n = 10; Fig. 28B). Podonotal shield 215–275 μm long and 245–350 μm wide, laterally fused with peritrematal shield, located on anterolateral margins of venter; opisthonotal shield 195–270 μm long and 245–340 μm wide, extensively united laterally and posteriorly with ventral shield. All dorsal setae on podonotal and opisthonotal shields, including marginal