Blepharoneura isolata Norrbom & Condon, 2010

Norrbom, Allen L. & Condon, Marty, 2010, Revision of the femoralis group of Blepharoneura Loew (Diptera: Tephritidae) 2374, Zootaxa 2374 (1), pp. 1-139 : 76-77

Blepharoneura isolata Norrbom & Condon , new species

Fig. 41

Diagnosis. This species is among the Blepharoneura species with the apical part of the wing obliquely banded, without marginal hyaline marks in cell r2+3. It differs from the other obliquely banded species by the following combination of characters: thoracic pleuron, scutellum and hind femur without brown markings; scutum with pair of broad brown marks on posterior margin and 2 pairs of brown vittae; and pterostigma with subapical hyaline spot. Another useful diagnostic character is that the proximal posterior hyaline spot in cell m is isolated from the posterior margin of the cell. The female is unknown.

Description. Head: Dark brown area on ocellar tubercle extended less than half distance to postocellar seta. Occipital suture narrowly orange brown.

Thorax: Scutum entirely microtrichose, with 2 pairs of red brown to dark brown vittae; submedial vitta narrowed slightly posterior to transverse suture but extended to level of dorsocentral seta, not connected to marks on posterior margin; sublateral vitta interrupted at transverse suture, postsutural part complete but separated from marks on posterior margin; posterior margin with 2 large triangular dark brown marks. Notopleuron without brown markings. Small brown spot anterior to postsutural supra-alar seta, another anterior to postalar seta, and brown spot lateral to dorsolateral corner of scutellum present. Scutellum entirely yellow. Subscutellum and mediotergite with pair of moderately broad brown vittae. Pleuron entirely yellow. Dorsocentral seta aligned slightly anterior to postalar seta.

Legs: Entirely yellow.

Wing ( Fig. 41 ): Length 7.13 mm, width 3.56 mm, ratio 2.00. Crossvein r-m at 0.47 distance from bm-cu to dm-cu. Cell c with 2 rectangular hyaline spots, both reaching costa and subcosta; medial brown area distinctly paler than area of cell r1 posterior to pterostigma, as broad as basal hyaline spot, narrower than distal spot. Pterostigma with large subapical pale brown spot [#3] reaching R1. Cells r1 and r2+3 basally (proximal to apex of R1) each with 2 hyaline spots, 1 posterior to apex of vein Sc and 1 more distally. Radial cells medially with relatively narrow quadrate basal marginal hyaline mark [#5] in cell r1 and nearly aligned spots in r2+3 [#8] and r4+5 [#14], that in r2+3 broad and slightly proximally offset, extended to R4+5; spot in cell r4+5 [#14] aligned with r1 mark, small, extended less than halfway across cell, barely touching R4+5; cell r2+3 with second, more distal, broad hyaline spot [#9], touching R2+3 but not reaching R4+5; cell r4+5 with medial hyaline spot [#15] near anterior end of dm-cu moderate sized. Distally cell r1 without marginal hyaline spot [#6] but with 1 elongate pale brown posterior spot. Cell r2+3 without marginal hyaline marks. Cell r4+5 with slightly irregular hyaline band from posteroapical margin, extending parallel to costa almost to vein R2+3, slightly tapering anteriorly and broader than marginal brown area. Cell m with 1 elongate [fused #26, #26A] or 2 smaller anteromedial hyaline spots, and with distal marginal hyaline mark [#29] extending to vein M and aligned with hyaline mark in cell r4+5 forming irregular band extending anteriorly beyond middle of cell r4+5; also extended very narrowly along posterior margin of cell m. Cell br with subbasal hyaline spot [#12]. Cell bm with circular subbasal and subapical hyaline spots [#19, #20]. Posteromedial part of wing with large irregular hyaline marks; cell br with subapical hyaline spot [#13]; cell dm with large L-shaped hyaline mark [fused #21, #22, #23, #24], proximal part extending anteriorly to vein M and aligned and connected with subapical spot in cell br [#13], distal part narrower but more elongate, aligned with distal branches of mark in cell cu1 [#32, #33]; cell cu1 with large anteriorly trilobed and posteriorly bilobed mark [fused #31, #32, #33, #34, #36, #36A?, #39] in medial half isolating 2 large anterior and 1 posterior brown spots, its proximal part [#31, #34, #39] aligned proximal to hyaline mark in cell dm and extending across apex of vein A1+Cu2, narrowly connected to medial part; subapical marginal hyaline spot [#37] moderate sized, not extending to vein Cu1. Cell dm with anteromedial subapical hyaline spot [#25], small and faint on 1 wing.

Abdomen: All tergites with 2 pairs of evenly spaced isolated dark brown spots, on tergites 3 and 4 irregular and extended to anterolateral corner (probably fused sublateral and anterolateral spots). All tergites also with pair of posterolateral dark brown bands, on tergites 3–5 extending slightly anteriorly on lateral margin.

Distribution. Guatemala. The area of the likely type locality is at 350–450 m elevation.

Type data. Holotype ♂ ( MCZ USNMENT00213933 ), GUATEMALA: La Providencia, Obispo, [no date], C.M. Rouillard. The type locality may be the farm Finca La Providencia [14°19'N 90°58'W] near the Río Obispo and the Obispo train station [14°15’N 90°58’W] near Siquinalá in Escuintla Department. The abdomen of the holotype was dissected prior to our study of it and unfortunately its terminalia are missing.

Etymology. The name of this species is an adjective referring to the isolated proximal hyaline spot in cell m.

Figures

FIGURES 36–45. Wing: 36–37, B. hirsuta Guyana: Moraballi Creek, USNMENT00213793; Brazil: Rio de Janeiro, USNMENT00213794); 38–39, B. hyalinella (Bolivia: Apa Apa, USNMENT00055933, USNMENT00055940); 40, B. io (holotype); 41, B. isolata (holotype); 42, B. lutea (Costa Rica: SW Rincon, USNMENT00213791); 43–44, B. macwilliamsae (Zurqui, USNMENT00048601, USNMENT00048483); 45, B. marshalli (Argentina: Yuto, USNMENT00213860).