Aspistomella tres Kovac, Kameneva & V. Korneyev 2024, sp. nov.

Aspistomella tres Kovac, Kameneva & V. Korneyev, sp. nov. urn:lsid:zoobank.org:act: 75316625-D2BF-4DDE-A1EA-7440A4792038 GenBank accession number PQ331195 Figs 1 C, 5 D, 7 B, 9 B, 44–47 Material examined. Type. Holotype ♀: “ Bolivia: Buena Vista [El Cairo] near Santa Cruz, [17.4734S, 63.6922W], on felled bamboo culm (Guadua chacoensis, last year), 12.i.2011, Bol 13/11 D. Kovac ” (SMF). Paratypes: Bolivia: 2 ♀, Santa Cruz, near Buena Vista (El Cairo) [17.5009S, 63.7050W], on freshly felled bamboo culm (expint, Guadua chacoensis), 10.i.2011, Bol B4b/11; 1 ♀, idem [17.4734S, 63.6922W], on felled bamboo culm (Guadua chacoensis, last year), 15.i.2011, Bol B20/11; 1 ♀, idem [17.4734S, 63.6922W], on felled bamboo culm (Guadua chacoensis, last year), 17.i.2011, Bol B34/11; 1 ♀, idem [17.4734S, 63.6922W], on bamboo culm (Guadua chacoensis, last year), sheaths removed, 18.i.2011, Bol B80/11; 1♂, 2 ♀, idem [17.5009S, 63.6743W], on upright bamboo culm (Guadua chacoensis, last year), 29.i.2011, Bol B91/11; idem[17.5009S, 63.6743W], larva in bamboo internode (Guadua chacoensis, last year), emerged on 8.ii.2011, Bol B157/11, 1 ♀ (leg. D. Kovac) (dissected), idem [17.4734S, 63.6922W], larva in internode of felled bamboo (Guadua chacoensis, last year), emerged on 18.ii.2011, Bol Z32/3/11, 1 ♂, idem [17.4734S, 63.6922W], larva in internode of felled bamboo (Guadua chacoensis, last year), emerged on 25.ii.2011, Bol Z32/4/11, 1 ♂ (leg. D. Kovac) (dissected) (SMF; SIZK). Non-type: Bolivia: Buena Vista (El Cairo) near Santa Cruz, [17.4734S, 63.6922W], on freshly felled bamboo culm (Guadua chacoensis), 9.i.2011, Bol B2b/11, 2 specimens (sex unknown, abdomens missing) (leg. D. Kovac), idem [17.4734S, 63.6922W], 28.i.2011, Bol B80/11, 1 ♀ (alcohol), idem, 28.i.2011, Bol B80/11, 1 ♀ (alcohol), idem, 29.i.2011, Bol B91/11, 1 ♀ (leg. D. Kovac) (alcohol); Bol.70.07, 30.11.2007, 5♀ (SMF; SIZK); Bol.77.07, 1.12.2007, 1♂ (alcohol) (SIZK). Larvae. Bolivia: Buena Vista, 6.ii.2011, BolZ32/11, 5 larvae (D. Kovac leg.) (SMF). Diagnosis. Aspistomella tres is similar to A. duo, A. heteroptera, A. lobioptera, and A. steyskali in having the costal vein bent anteriorly before the apex of vein Sc, the costal cell lobate, and the pterostigma very short, shorter than width of costal cell (Fig. 44 F), and differs from them by details of the wing pattern: apical quarter of cell r 4+5 entirely dark (in A. heteroptera, A. lobioptera, A. steyskali crossed by hyaline incision); Aspistomella tres is very similar to A. duo in having wing apex without hyaline incisions crossing cell r 4+5, but differs from it by a conspicuously narrower wing and cell dm between crossveins r-m and dm-m with hyaline mark entering cell r 4+5 anteriorly (Figs 5 C, D). Description. Male. Head (Figs 44 D, E) ratio (length: height: width) = 1: 1.4: 1.6, frons, parafacial, and gena yellowish brown, except anterior part of frons yellow; lunule and face between antennae yellow, and occiput mostly black, at least in dorso-lateral part. Frons (Fig. 44 D) 1.2× longer than wide, with shining, partly brown or black ocellar triangle and brown vertical plates; orbits silver-white microtrichose; parafacial narrow, 0.3–0.4× broader than postpedicel, white microtrichose. Frons with 4–5 parafrontal setulae and 2–4 frontal setae at each side, frontal vitta with 1–3 interfrontal setae at each side; anteriormost setae longer than other and half as long as outer vertical seta; 1 very long orbital seta, as long as ocellar seta, 0.6–0.75× longer than inner vertical seta and 1.7× longer than outer vertical seta; postocellar seta long, 0.5× longer than inner vertical seta; outer vertical seta short, 0.4× longer than inner vertical seta and 4–5× longer than postocular setae forming one row, allied by 4–5 dorsal and 10–16 ventral occipital setae. Lunule very narrow, indistinguishable, orange. Eye 1.4–1.5× higher than long. Face above suture 0.6–0.7× higher than wide at transverse fold, yellow, densely white microtrichose; epistome (below suture) reddish brown to black, sparsely white microtrichose, with metallic greenish or golden sheen, strongly produced anteriorly and separated from upper part of face by deep suture. Clypeus brown or yellow, densely white microtrichose, matt, 0.4–0.5× higher than epistome. Gena brownish yellow, with long genal seta and 4–6 additional, much shorter, setae anterior of it, 0.3–0.4× longer than genal seta. Occiput black, except postgena brownish-yellow, with yellowish to cyan metallic sheen, moderate densely covered with greyish microtrichia partly hiding underlying cuticle; ventral part of occiput (postgena) with 3–4 setae almost as long as genal seta. Antenna yellow; postpedicel whitish microtrichose, 2–2.1× longer than wide, apically rounded; arista black except yellow at basal 0.2, almost bare. Mouthparts brown, prementum brown or black, subshining. Palp yellow, moderately wide, apically rounded, with 10–12 strong black setulae, of them 5–6 subapical setulae 1.5–2× longer than other setulae. Thorax (Figs 44 A–C) brown to black, with bluish sheen and sparse white microtrichia not hiding underlying cuticle. Mesonotal scutum 1.3× longer than wide; prescutellar area either entirely black, including postpronotal lobes and notopleuron, or widely yellowish brown with brown margins or medially black with yellowish postpronotal lobe and notopleural triangle; black setulose, with 18–20 rows of setulae between rows of dorsocentral setulae; acrostichal prescutellar setae absent in all specimens examined, at most one pair of setulae 1.5× longer than surrounding setulae present; prescutellar area medially setulose and without setulae around dorsocentral setae. Scutellum dorsally very slightly convex, orange to dark brown, sparsely microtrichose, devoid of setulae, often with conspicuous bluish or greenish sheen. Subscutellum subshining, brown to black. Mediotergite subshining black, conspicuously microtrichose. Other setae as described for the genus. All the setae and setulae black. Wing (Figs 5 D, 44 F) 5.5–7.5 mm (♂), 5.9–7.9 mm (♀) long, 3.5–3.75× longer than wide; basicostal cell hyaline; costal cell lobate, 4–4.5× longer than wide, brown in basal and apical quarters of length, with costa conspicuously curved posteriorly and covered with slightly longer setulae before apex of vein Sc (Fig. 45 F); pterostigma entirely brown, narrow triangular, 0.3–0.4× longer than wide, vein R 1 with 4–6 setulae dorsally (Figs 44 F, 45 E, F), ending slightly distal to middle of R 2+3 first section (between fork and crossvein dm-m) in both sexes; vein R 2+3 faintly arcuate or almost straight, subparallel to costa to very apex. Crossvein r-m conspicuously distal to middle of cell dm in both sexes. Cell r 4+5 5.5–7× longer than wide, apically narrowed. Cell m 1 narrow triangular; ultimate section of M 1 4–5× longer than crossvein dm-m and 2–2.3× longer than penultimate section. Vein CuA sinuate, cell cua with very short posteroapical lobe along vein CuP. Wing pattern with short subbasal crossband from humeral vein to base of cell cua and large dark brown mark widely from apical lobe of costal cell almost to base of cell dm 3 whitish hyaline incisions (one wide triangular at anterior margin extending from cell r 1 into r 2+3 next to crossvein r-m, and two oblique cuneiform at posterior margin, extending from cells m 1 and m 4 into cell r 4+5 at both sides of crossvein dm-m; cell m 4, cup (anal cell sensu Kameneva & Korneyev 2010) and anal lobe grey; anal lobe as wide as cell cua. Alula 3× longer than wide, darkened in apical half. Calypters white, with white ciliae. Halter yellow with brown or black knob. Legs (Fig. 44 A) with yellow fore coxae and all trochanters, and brown to yellow mid and hind coxae; femora yellow, in apicodorsal half mostly brown; tibiae and tarsi brown, in teneral sapecimens pale brownish yellow, black setose and setulose, without conspicuous microtrichia or metallic sheen in examined specimens. Fore femur with 2 rows of posterodorsal and posterior setae, and 1–2 preapical posteroventral setae, all slightly shorter than femur width. Mid femur anteriorly and posteriorly with short setulae, but without long erect setae; mid tibia ventrally with single spur-like seta 1.7–2× longer than tibia width. Abdomen moderately elongate brown to entirely black, syntergite 1+2 often brownish yellow; tergites finely sparsely microtrichose, with faint cyan metallic sheen, except tergite 5 of ♂ and tergite 6 of ♀ (the latter almost entirely hidden inderneath tergite 5) brown or black without metallic sheen; setulae and setae black. Male postabdomen (Figs 46 A–E) as described for A. duo, but phallus somewhat shorter, only 2.5–3× longer than epandrium height (in A. duo, at least 4× longer than epandrium height). Female terminalia not dissected, aculeus not flattened, with cercal unit oval and long setulose. Third instar larva. General structure: As in A. duo, body length 8.4–11.8 mm (median: 9.9 mm; n = 10), width 2.2–2.9 mm (median: 2.75 mm; n = 10). Pseudocephalon: As in A.duo. Second antennal segment retracted, not visible. Structure and pattern of oral ridges as in A. duo, thirty central oral ridges adjacent to oral cavity, identical on both sides of the body (n = 1 larva). Cephalopharyngeal skeleton (Fig. 7 B) as in Aspistomella duo. Total length about 1.3 mm (n = 2). Indentation between tips of apical tooth and ventral apodeme 0.81–0.83× as deep as wide. Hypopharyngeal sclerite 4.5–4.9× longer than high. Parastomal bars curved, 1.1–1.2× longer than hypopharyngeal sclerite. Thoracic segments I–III: As in A.duo. Anterior spiracles on thoracic segment I contain 19–25 tubules per row (median = 22, n = 20 rows of tubules from 10 larvae). The number of tubules on the left or right side of the same larva differs by one to four tubules. Spatial pattern of cuticular sensilla and paired spiracular openings as in A. duo. Abdominal segments I–VII. Abdominal segments I-VII bear 13 cuticular sensilla on each s