Aspistomella garleppi V. Korneyev & Kameneva, 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 : 42-44

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

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Figs 6 D , 24

Material examined. Type. Holotype ♂: “ Peru / Madre De Dios / O. Garlepp c.”, “ Coll. W. Schnuse / 1911-3”, “ Euxesta s. (nova)” [pencil hadwritten label of W. Hennig]; (right antenna, left wing and left mid leg missing; abdominal segments 4–5 missing, apparently removed by W. Hennig for preparation in 1938–1939 and lost) ( SDEI) . Paratypes: 1 specimen [sex unknown] (both antennae, hind legs, mouthparts and abdomen missing), 1 ♂ (both antennae, mouthparts and ventral part of abdomen including all sternites, pleural membrane and genitalia missing), same labels as in holotype ( SMTD) .

Diagnosis. Aspistomella garleppi are moderately large flies (WL> 6.0– 6.4 mm), differing from all other species of the group of genera by the combination of the very long pterostigma, straight costal cell, vein R 1 dorsoapically setulose, crossvein r-m slightly proximal to the level of R 1 apex but far distal from Sc apex, head with narrow frons, face uniformly grey or silvery microtrichose, epistome strongly developed, ocellar and outer vertical seta short, 0.2–0.3× longer than orbital and inner vertical seta, prescutellar acrostichal seta absent, wing extremely elongated, 3.8–4× longer than wide; with pattern of narrow subbasal and wide discal crossband separated from the entirely dark apex by hyaline interspace covering the entire area of cell dm between crossveins r-m and dm-m; and mid tibia ventroapically with 1 long spine.

Description. Male. Head ( Figs 3 C , 24 B–D ) ratio (length: height: width) = 1: 1.1–1.2: 1.6; frons, parafacial, and gena reddish brown, most of epistome and occiput dark brown to black; face below lunule white microtrichose. Frons moderately wide, slightly narrowed posteriorly ( Fig. 24 C ), 1–1.1× as long (from lunule to anterior ocellus) or 1.6–2× (from lunule to inner vertical seta) as wide (at lunule), with black, steel shining, sparsely microtrichose vertex; orbits in posterior half, parafacial, narrow transverse band on face above fold, gena and occiput silver-white microtrichose; parafacial less than half as wide as postpedicel. Vertical plates with 1 strong and 1 setula-like orbital setae. Frontal plate with 10–12 short lateroclinate parafrontal setulae, frontal vitta sparsely whitish microtrichose, with 6–7 moderately developed frontal and 3–5 stronger interfrontal setae on each side ( Fig. 24 C ). Eye 1.3× higher than long. Face white microtrichose above epistome; epistome black to brown, sparsely white microtrichose, with metallic bluish sheen. Clypeus black, sparsely white microtrichose, with metallic sheen, 0.3× higher than epistome. Gena brownish yellow, narrowly white microtrichose along orbit, with 1–2 long genal setae and 4–6 additional long peristomal setae anterior to it, shorter than genal seta. Occiput brown to black, silver-grey microtrichose.

Antenna yellow to reddish brown, inserted below the middle of the eye; scape with black setulae; postpedicel moderately long, rounded, 1.8–2.0× longer than wide; arista brown apically, yellow in basal 1/4, 2-segmented, bare. Mouthparts brown to black, prementum black, sparsely microtrichose. Palp yellow to reddish brown, apically rounded, with 10–15 black setulae, of which 5–6 subapical setulae twice as long as other setulae.

Thorax ( Figs 24 E, F ) black, on pleura with silvery sheen and sparse grey and brown (posterior of transverse suture and in supraalar area) microtrichia not hiding underlying cuticle. Mesonotal scutum ( Fig. 24 F ) 1.6–1.7× longer than wide; black setulose, with 12–14 rows of setulae between rows of dorsocentral setulae; acrostichal prescutellar seta absent; prescutellar area with 2–4 rows of setulae between posterior dorsocentral setae. Scutellum dorsally slightly convex, black, subshining, very sparsely white microtrichose, apically shagreened, without setulae. Subscutellum and mediotergite shining black. All the setae and setulae black.

Wing ( Fig. 6 D ) 6.5–6.7 mm long, 3.8–4× longer than wide; basicostal cell hyaline; costal cell straight, 5–6× longer than wide, pale brownish or yellowish at base and apex; pterostigma entirely brown, triangular, 6–8× longer than wide, vein R 1 with 12–14 setulae dorsally, ending slightly distal to level of crossvein r-m level; costal vein between apices of R 1 and R 2+3 slightly arcuate; vein R 2+3 inconspicuously undulate. Crossvein r-m at proximal 2/5 of cell dm. Cell r 4+5 4.0–4.5× longer than wide, apically narrowed. Cell m 1 narrow triangular, with pointed apex; ultimate section of M 1 3.6× longer than crossvein dm-m and 1.2–1.4× longer than penultimate section. Vein CuA Z-shaped, forming moderately long posteroapical lobe of cell cua along vein CuP, 1.8× longer than its anterior shoulder. Wing pattern with short pale brown subbasal crossband from humeral vein through cell cua into alula, wide discal crossband from apex of costal cell and pterostigma into basal half of cell dm, with wide hyaline interspace covering the entire area of cell dm between crossveins r-m and dm-m separating entirely dark apex by hyaline; cell m 1 entirely pale brown ( Fig. 6 D ). Cell cup and anal lobe 0.7–0.8× broader than cell cua 1. Alula 2.4× longer than wide, grey. Calypters white, with long white cilia. Halter yellow.

Legs ( Figs 24 A, E ) long and narrow, mostly black, except tarsi brown; femora with metallic sheen, sparsely grey microtrichose. Fore femur with 2 rows of posterodorsal and posterior setae 0.6× longer than femur width, and 2–4 moderately strong posteroventral setulae in apical half. Mid femur anteriorly with short suberect setulae; mid tibia moderately thickened, ventrally with one spur-like setae 2× longer than tibia width.

Abdomen black, short black setulose, with rows of whitish microtrichia (as on Fig. 24 G ).

Genitalia missing in all specimens.

Etymology. The species is named after its collector, Otto Garlepp (1864–1959).

Remarks. The holotype and paratypes are damaged: abdominal segments 4–5 of the holotype were detached by Willi Hennig in 1938–1939, but no slides can be found either in SDEI, or in MNKB. The paratype specimens are partially eaten by psocids and the abdomens are partly postabdomens completely or completely missing. The generic position of the species is provisional, as it requires more detailed analysis of the male genitalia, morphology- and / or molecular-based phylogenetic analysis.

Figures

FIGURE 3. Lipsanini, head (A–B—dorsal, C–D—left lateral view). A, Ulivellia amnoni sp. nov.; B, Euxesta quaternaria Loew; C, Aspistomella garleppi sp. nov.; D, “Euxesta” insolita Hendel. Abbreviations: a orb s—anterior orbital seta; ar— arista; clyp—clypeus; epst—epistome; fr s—frontal seta; fr stl—frontal setulae; fr vit—frontal vitta; frorb plt—fronto-orbital plate; gn s—genal seta; i vt s—inner vertical seta; ifr s—interfrontal seta; o vt s—outer vertical seta; oc s—ocellar seta; p orb s—posterior orbital seta; pafc—parafacial; ped—pedicel; pfr stl—parafrontal setula; pgn s—postgenal seta; poc s—postocellar seta; pocl s—postocular setae; pped—postpedicel; pst s—perisomal setae; vt plt—vertical plate.

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 24. Aspistomella garleppi sp. nov. holotype ♂ (A–E, H) and paratype (sex unknown) (F–H). A, habitus, left; B, head and thorax, dorsal; C, head, antero-dorsal; D, head left; E, thorax and fore femur, left; F, thorax and base of abdomen, dorsal; G, abdominal syntergite 1+2, setae and microtrichia; H, labels.