Neoacanthoneura brachioptera Kameneva

Kameneva, Elena P., 2012, Revision of Aciuroides Hendel and Neoacanthoneura Hendel (Diptera: Ulidiidae: Pterocallini), Zootaxa 3227, pp. 1-33 : 15-18

Neoacanthoneura brachioptera Kameneva , new species

( Figs. 33–34 , 51 )

Type material. Holotype ♂, ECUADOR, Napo: Res. Ethnica Waorani, 1 km S Onkone Gare Camp, Trans. Ent. , 5.II.1994, 00º39'10"S 076º26'W, 220 m, insecticidal fogging of mostly bare green leaves, some with covering of licheneous or bryophytic plants in terre firme forest, at Trans. 4, Sta 1 Project MAXUS lot 1431, T. L. Erwin et al. collectors ( USNM ENT 00054661 ), deposited in trust at USNM for eventual deposit in EPNE. Paratypes:; ECUA- DOR : ♂, same but Trans. 2, Sta 4 Project MAXUS lot 1144 ( USNM ENT 00054526 ); paratype ♂, same but 10.II.1996, at Trans. 2, Sta 2 Project MAXUS lot 1484 ( USNM ENT 00054684 ) ( USNM) ; COSTA RICA: ♀, Rancho Quemado, 200 m, Peninsula de Osa, Prov. Puntarenas, VII.1992, L-S 292500, 511000, M. Segura ( INBIO CRI 000723691 ) ( INBio) ; 2♀, Estrella Valley, Pandora , 28.III.1984, Malaise trap, G. V . Manley ( DEBU); GUATE- MALA: ♂, Matias de Galvez , 14–15.VIII.1965, P.J.Spangler ( USNM) (antennae missing, base of abdomen partly destroyed by dermestids) ; MEXICO: 2♂, Veracruz, Los Tuxtlas Estac. Biol. , 16–19.IX.1989, E.Barrera, T . J. Henry & I.M.Kerzhner collectors ( USNM) (antennae missing, base of abdomen one male partly destroyed by dermestids) ; PANAMA: 2♂, Barro Colorado Is. C [anal] Z[one], No 4656, lot 40-14769, 23–24. V .1940, J. Zetek ( USNM, SIZK) ; ♂, Mojinga Swamp , Ft. Sherman, C [anal] Z[one], I.1952, F.S.Blanton ( USNM) ; ♂, 3♀, same but 14. VI .1952, F.S. Blanton ( USNM, SIZK) (antennae missing) ; 2♂, same but 1.VII.1952, F.S. Blanton ( USNM, SIZK) .

Diagnosis. Neoacanthoneura brachioptera is similar to N. apicalis in the wing pattern as described for the apicalis group, differing from it in having an apical band joined to discal crossband in pterostigma and cell r1, and from almost all the species of the genus by the subbasal crossband entirely brown, cuneiform, without hyaline spots in it. Neoacanthoneura brachioptera can be distinguished from other species of the genus by the pterostigma in at least apical 0.8 or entirely brown, so that the discal crossband is T-shaped (in male and female), and by the costal margin of the wing angulated (sharply bowed anteriorly) immediately distally of the level of crossvein dm-cu (in male).

Description. Male. Head brownish yellow, with creamy white, finely white microtrichose face and frons orbits, length: height: width ratio 1: 1.35–1.4: 1.5–1.6, with compound eye 1.45 times as high as long and frons 1.3–1.6 times as long as wide, concave. Head setae as described for N. apicalis ; 2–4 frontal setulae, of them middle seta as long as anterior orbital seta and 0.5–0.7 times as long as medial vertical seta, inclinate, one posterior reclinate, ca. 0.3 times as long as anterior orbital seta. Flagellomere 1 yellow, densely microtrichose, twice as long as wide. Gena with 5–7 peristomal setae. Thorax brown, sometimes with yellow prothorax and katepisternum, otherwise like in N. apicalis . Legs colouration variable, brown to yellowish-brown or mostly yellow, with black setae and setulae; one tibial spur 2.3–2.4 times as long as tibia wide. Wing ( Fig. 33 ) hyaline with brown pattern, as described for N. apicalis , except basicostal and costal cells dark brown, subbasal band long cuneiform, solid brown without hyaline spot in cell r2+3, reaching apical 1/4 of dm cell; discal crossband T-shaped, fused with proximally produced dark transverse band at least in apical 0.8 of pterostigma and fused with apical C-shaped spot; costal vein sharply bowed anteriorly at apical 0.7–0.8 of wing length, with both ventral and dorsal rows of dense setulae slightly thickened, short spur-like. Pterostigma almost twice as long as costal cell. Vein R1 ending distally of dm-cu level, setulose on dorsal surface only distally of Sc apex, mostly subparallel to costa. Vein R2+3 slightly undulate. Vein R 2+3 S-like undulate anteriorly of r-m and dm-cu crossveins, then gradually curved posteriorly. Vein M sections ratio m3: m2: m4 = 1: 8–10.2: 7. Wing length 3.7–4.5 mm.

Male abdomen as described for N. apicalis . Postebdomen superficially as described for N. chiroptera , not dissected.

Female similar to male, except wing venation less modified, costal margin evenly arcuate, without thickened setulae, R1 setulose only along pterostigma, bare in proximal part; pterostigma 1.1–1.2 times as long as costal cell, dark brown at least in apical 0.7, often entirely dark spot making discal crossband T-like; apical crossband crescentshaped, joined to discal crossband in cell r1 ( Fig. 34 ); wing length 3.3–3.8 mm; thorax, abdomen and legs as described for N. apicalis ; postabdomen superficially as described for N. chiroptera , not dissected.

Etymology. The name is from the Latin brachium, shoulder, and Greek pteron, wing, reflecting the wing shape of the male.

Figures

FIGURES 27 – 40. Neoacanthoneura, wing: 27 – 28, N. apicalis new species: 27, holotype 3 (Ecuador, Napo (USNM ENT 00053921 )); 28, paratype Ƥ (Mexico, Chiapas (USNM )); 29 – 30, N. dryas new species: 29, holotype 3 (Panama, Fort Gulick (USNM )); 30, paratype Ƥ (Panama, La Campana (USNM )); 31 – 32, N. chiroptera new species (Trinidad, Arima Valley (USNM )): 31, holotype 3; 32, paratype Ƥ; 33 – 34, N. brachioptera new species: 33, holotype 3 (Ecuador, Napo (USNM ENT 00054661 )); 34, paratype Ƥ (Costa Rica, Estrella Valley, Pandora (DEBU )); 35 – 36, N. goniata new species, 3 (Trinidad, Arima Valley (USNM )): 35, holotype; 36, paratype; 37 – 38, N. steyskali new species: 37, holotype 3 (Costa Rica, Sector Cocori (INBio CRI 001647247); 38, paratype Ƥ (Panama, Barro Colorado (USNM )); 39 – 40, N. subapicalis new species: 39, holotype 3 (Costa Rica, Est. San Ramón Oeste (INBio CRI 001777694 )); 40, paratype Ƥ (Costa Rica, Buen Amigo San Luis Monteverde, # 3168, INBio CRI 001 991556). Abbreviations: AB—apical band, ACB—accessory crossband, DB—discal crossband. SBB—subbasal crossband, ST—transverse streak.

FIGURES 49 – 54. Neoacanthoneura, habitus, laterally: 49 – 50, N. apicalis new species: 49, holotype 3 (Ecuador, Napo (USNM ENT 00053921 )); 50, paratype Ƥ (Mexico, Chiapas (USNM )); 51, N. brachioptera new species, holotype 3 (Ecuador, Napo (USNM ENT 00054661 )); 52, N. chiroptera new species, holotype 3 (Trinidad, Arima Valley (USNM )); 53 – 54, N. dryas new species: 53, holotype 3 (Panama, Fort Gulick (USNM )); 54, paratype Ƥ (Panama, La Campana (USNM )).