Neoacanthoneura subapicalis Kameneva

Kameneva, Elena P., 2012, Revision of Aciuroides Hendel and Neoacanthoneura Hendel (Diptera: Ulidiidae: Pterocallini), Zootaxa 3227, pp. 1-33 : 25-26

Neoacanthoneura subapicalis Kameneva , new species

( Figs. 39–40 )

Type material. Holotype ♂: COSTA RICA, Est. San Ramón Oeste, Prov. Alaju.[ela], 620 m, 3–19.IV.1994, L_N 318100_381900, #2817, F. Quesada collector ( INBio CRI001777694 ) ( INBio) . Paratypes: COSTA RICA: 2♀, Buen Amigo San Luis Monteverde , Prov. Punta. [renas], 100–1350 m, VIII.1994, L_N 250850_449250, #3168, Z. Fuentes collector ( INBio CRI001 991556) ; ♀, Buen Amigo San Luis Monteverde , Prov. Punta. [renas], 100–1350 m, Malaise trap, I.1997, L_N 250850_449250, #45269, Z. Fuentes collector ( INBio CRI0021 534682) ( INBio) ; COLOMBIA: 10 ♀, Anolaima , trapping McPhail, 1151, I.1978, J. R. Cure ( USNM, SIZK) ; BRASIL: ♂, Nova Teutonia , Sta. Catarina, F. Plaumann, 28.II.1954 ( ZMHB) .

Diagnosis. Neoacanthoneura subapicalis is very similar to N. apicalis in having the wing pattern with a triangular hyaline spot within the subbasal band and by the anterobasal margin of the apical spot perpendicular to the longitudinal veins rather than oblique and reaching at least R2+3 either as a dark streak or as the proximal margin of the whole spot, differing by the shape of the apical spot in the male, which is a C-shaped band, as in females of both species, whereas in N. apicalis it covers the entire apex of the wing. Both ♂ and females of N. subapicalis have wing pattern almost identical to that in females of N. apicalis , differing from females of that species by the anterior margin of the discal crossband covering the apical 0.55–0.7 of the pterostigma length and forming a short perpendicular shoulder at the anterobasal margin of the Γ-shaped discal crossband, whereas in N. apicalis it is conspicuously narrower, with the dark spot covering only apical 0.3–0.5 of cell sc.

Description. Male. Head yellow length: height: width ratio 1: 1.3: 1.5, with compound eye 1.4 times as high as long and frons 1.45 times as long as wide. Head setae and appendages as in N. apicalis . Thorax brown with partly yellow pleura, otherwise as in N. apicalis . Legs yellow with black setae and setulae, hind leg mostly brown.

Wing ( Fig. 39 ) with pattern as described for N. apicalis female. Costal vein evenly arcuate, with ventral row of setulae not thicker than setulae of dorsal row. Pterostigma narrow, as long as costal cell. Vein R1 dorsally setulose along mostly whole its length, mostly subparallel to costa. Vein R2+3 slightly undulate. Vein M ratio m3: m2: m4 = 1: 8: 7.2; vein R4+5 bare. Wing length 2.3–3.2 mm.

Male abdomen and epandrium not dissected, externally as in N. apicalis .

Female similar to male, mid and hind legs mainly brown; wing ( Fig. 40 ) as in female of N. apicalis , except pterostigma as long as costal cell, dark brown in apical 0.55–0.7 of length, with dark spot conspicuously wider than crossband posterior of it and forming Г-like shoulder; vein M ratio m3: m2: m4 = 1: 7–8: 5–6.5; vein R4+5 bare. Wing length 3.2–4.0 mm. Female terminalia not dissected.

Etymology. The name is from the Latin prefix sub - (below, near, almost) and apicalis , reflecting its similarity to N. apicalis new species.

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.