Aspistomella quinquincisa Kameneva & V. Korneyev, 2024

Kovac, Damir, Kameneva, Elena P., Korneyev, Severyn V., Araújo, Alexandre Santos, Savaris, Marcoandre, Smit, John T., Schneider, Alexander, Schreiber, Robert & Korneyev, Valery A., 2024, Revision of the Aspistomella group of genera (Diptera: Ulidiidae: Pterocallinae: Lipsanini), Zootaxa 5530 (1), pp. 1-117 : 61-64

Aspistomella quinquincisa Kameneva & V. Korneyev , sp. nov.

urn:lsid:zoobank.org:act:ADC8FC31-03E6-4F57-83B3-198A102D8CF0

Figs 6 F , 36–37

Material examined. Type. Holotype ♂: Brazil: “Brasilien / St. Cath. [arina], Joinville / Schmalz S. V.” (cyan paper label, no date”, “Zool. Mus. Berl.” (yellow label) (left wing missing, right wing detached and glued after photographing; abdomen dissected and mounted in microvial with glycerine) ( NKMB).

Diagnosis. Aspistomella quinquincisa is most similar to A. crucifera in comparatively short head and less produced epistome, narrow frons and wings, as well as in wing venation, wing pattern widely dark with large subbasal and four incisions in apical dark area, differing from it by the cell r 1 with 2 marginal hyaline marks cuneiform, narrowed posteriorly, of which the second incision extends only into cell r 2+3 (in A. crucifera , into cell r 4+5) and the hyaline mark in cell m 1 crossing vein M 1 to the middle of cell r 4+5 (in A. crucifera , only reaching vein M 1). It differs from the other species of the genus as indicated in the key to species.

Description. Male. Head ( Figs 36 C, D ) ratio (length: height: width) = 1: 1.4: 1.7, frons, face above transverse fold, parafacial, and gena reddish or yellowish brown, epistome and occiput mostly black. Frons ( Fig. 36 C ) slightly narrowed posteriorly, 0.7× as long (from lunule to anterior ocellus) or 1.2× (from lunule to inner vertical seta) as wide (at lunule), with subshining black ocellar triangle and vertical plates; orbits, vertex, gena and occiput silver-white microtrichose; parafacial narrow, 0.25–0.3× broader than postpedicel, reddish-yellow, sparsely white microtrichose. Frontal plates with 4–5 fine parafrontal setulae and 3–4 frontal setae on each side, frontal vitta with shallow wrinkles, sparsely and very short microtrichose; with 1–2 pro- or inclinate interfrontal setae ( Fig. 36 C ). Eye 1.3× higher than long. Face yellowish brown, white microtrichose above epistome; epistome moderately produced anteriorly and separated from upper part of face by shallow fold, brown, sparsely white microtrichose, with metallic bluish sheen. Clypeus brown, sparsely white microtrichose, subshining, 0.4× higher than epistome height. Gena brownish yellow, with long genal seta and 4–5 additional long peristomal setae anterior of it, 0.4–0.6× longer than genal seta. Occiput black, with cyan metallic sheen, greyish microtrichose.

Antenna yellow; scape and pedicel with black setulae; postpedicel yellow, whitish microtrichose, 1.6× longer than wide, apically rounded; arista black except yellow at base, almost bare. Mouthparts brown to black, prementum black, sparsely microtrichose. Palp yellow to brown, as described for A. angustifrons .

Thorax ( Figs 36 A, B, E ) brown to black, silvery subshining, with sparse white microtrichia not hiding underlying cuticle. Mesonotal scutum 1.3× longer than wide; black setulose, with 2 pairs of dorsocentral setae; rows of setulae between them broken off and indistinguishable, but not more than 4; acrostichal prescutellar seta present, 0.8× longer than posterior dorsocentral seta (prescutellar area partly destroyed with pin). Other setae as described for the genus, black. Scutellum dorsally slightly convex, brown, subshining, finely chagreened, sparsely microtrichose, without setulae. Subscutellum and mediotergite as in A. angustifrons .

Wing ( Figs 6 F , 36 F ) 3.2 mm long, 2.8× longer than wide; basicostal cell hyaline; costal cell straight, 6× longer than wide, brown in basal 1/3 and 1/5 of its length; pterostigma entirely brown, narrow triangular, 2.5× longer than wide; vein R 1 bare, ending proximally of crossvein r-m level; vein R 2+3 slightly arcuate in basal half, straight at apex. Crossvein r-m at middle of cell dm. Cell r 4+5 9× longer than wide. Cell m 1 narrow triangular; ultimate section of M 1 3.4× longer than crossvein dm-m and 1.9× longer than penultimate section. Vein CuA Z-shaped, forming moderately short posteroapical lobe of cell cua along vein CuP, 2× longer than its anterior shoulder. Wing pattern with subbasal crossband from humeral vein through cell cua into alula; wing distally of cells c, bm, cua and radial fork dark brown with 4 large hyaline areas: 2 hyaline incisions at anterior margin from cell r 1: proximal one through cell r 2+3 into base of cell r 4+5 distally of crossvein r-m and distal to middle of cell r 2+3; and at posterior margin into apical part of cell dm (part of wing in apical part of cell m 4 missing in the holotype) and from basal part of cell m 1 ending at middle of cell r 4+5 ( Fig. 6 F ). Calypters white, with white cilia. Halter yellow.

Legs ( Fig. 36 A ): fore coxa yellow, fore trochanters, femora, tibiae, and tarsi missing in holotype. Mid and hind leg brownish yellow, except hind coxa blackish brown and tarsi yellow. Mid femur anteriorly with of 8 and posteroapically with 3 suberect setulae; mid tibia ventrally with single spur-like seta 2.5× longer than tibia width. Hind femur with 2 long subapical setae dorsally.

Abdomen ( Figs 36 A, B, G ) subshining black, sparsely black setulose, cuticle very shallowly rugulose ( Figs 36 G, H ), only syntergite 1+2 and lateral margins of tergites 3–5 and sternites with sparse whitish setulae. Sternites 3–5 sparsely microtrichose, black setulose, as on Fig. 37 A . Pregenital sternite 8 microtrichose and short setulose, with 2 thicker and longer setae ( Fig. 37 A ).

Male genitalia ( Figs 37 B–F ) with short cerci, moderately narrowed, simple, blunt surstyli without lobes or serrations and one row of 3 moderately thickened setulae on mesal surface ( Fig. 37 E ). Phallus narrow, 2.5–3 times as long as epandrium high, bare ( Figs 37 B, C ). Hypandrium: phallic guide with suboval lobes forming conspicuous posterior projections, bearing pair of oval postgonites just anterior of basiphallus ring ( Figs 37 D, E ); pregonites symmetrical, with 2–3 setulae ( Fig. 37 F ).

Female terminalia: not examined.

Remarks. The specimen is in fair condition: right postpedicel, both fore legs (except fore coxae), left mid and hind leg, left wing and most mesonotal setulae missing. Right wing detached and glued to the specimen after taking picture. Abdomen dissected and kept in a microvial pinned together with specimen.

Etymology. The species name is a Latin adjective, reflecting the presence of five hyaline marginal incisions in the wing pattern, which is an essential character of this species.

Figures

FIGURE 6. Aspistomella, wing. A, A. sachavaca sp. nov.; B, A. schnusei sp. nov.; C, A. angustifrons (Hendel); D, A. garleppi sp. nov.; E, A. crucifera (Hendel); F, A. quinquincisa sp. nov.; G, A. teresensis sp. nov.; H, A. obliqua sp. nov. Abbreviations: C—costal vein; c—costal cell; M1—first branch of media; m1—first medial cell; ptstg—pterostigma; r1—first radial cell; rm—radial-medial crossvein. Scale bar: 1 mm.

FIGURE 36. Aspistomella quinquincisa sp. nov., holotype ♂ (MNKB). A, habitus, left; B, same, dorsal (wings detached); C, head, anterior; D, same, left; E, mesonotum, dorsal; F, wing, anterobasal part; G, abdomen, dorsal; H, third abdominal tergite, vestiture; I, labels. Scale bar: 1 mm.

FIGURE 37. Aspistomella quinquincisa sp. nov., holotype ♂ genitalia (MNKB). A, abdomen, ventral; B, postabdomen, lateral; C, same, ventral; D, same, postero-dorsal; E, same, posterior; F, same, ventral. Abbreviations: bph—basiphallus; cerc—cerci; epand—epandrium; hypd—hypandrium; ph g—phallic guide; ph—phallus; pgt—postgonite; pregt—pregonite; s—seta; sur — surstylus.