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Anastrepha shannoni Stone

Recognition
Anastrepha shannoni differs differs from all other Anastrepha species in having a pair of basal lobes on the dorsal side of the aculeus tip. It differs from most other species in having a complete S-band that is broadly fused to the C-band along the costa, so that there is no hyaline area in cell r1 distal to the apex of vein R1. It differs from the other species with this type of wing pattern in having the abdomen redbrown except for a yellow medial stripe, and from all of the species except A. grandis in having cell r2+3 entirely infuscated. It further differs from A. grandis in lacking a hyaline area in cell br, and in having shorter terminalia.

Description
Body mostly red-brown to dark red-brown. Setae dark red-brown to black.

Head: Concolorous except dark brown ocellar tubercle; 3-4 frontal setae; 2 orbital setae, posterior one usually weak. Antenna extending 0.70-0.80 distance to lower facial margin.

Thorax: Mesonotum 3.65-3.90 mm long. Scutum entirely microtrichose; mostly redbrown to dark redbrown; single distinct yellowish medial stripe from anterior margin to slightly posterior to acrostichal seta, moderately expanded posteriorly, extending laterally beyond acrostichal seta but not reaching dorsocentral seta; narrow, faint orange stripe extending from anterior margin, crossing dorsocentral seta; distinct yellowish sublateral stripe from transverse suture to posterior margin, crossing intra-alar seta; distinct yellowish mark extending posteriorly from postpronotal lobe to presutural supra-alar seta, almost joining sublateral stripe on transverse suture; scuto-scutellar suture often entirely dark brown, but without distinct medial spot. Subscutellum and mediotergite narrowly orange medially, broadly redbrown to dark brown laterally. Pleura with typical dark areas of anepisternum, katepisternum, anepimeron, meron, and laterotergite redbrown to dark brown, strongly contrasting with lighter areas. Katepisternal seta undifferentiated or weak, yellowish, no longer than postocellar seta.

Wing: Length 8.10-8.60 mm. Vein R₂₊₃ almost straight. Vein M strongly curved apically; section between bm-cu and r-m 2.45-2.90 times as long as section between r-m and dm-cu. Pattern light yellow brown to dark orange brown, its margins often diffuse. Cells br and r₂₊₃ entirely infuscated. Cell dm with large basal hyaline area. Cell bm hyaline. Proximal arm of V-band not extending anteriorly beyond M, not connected to S-band.

Abdomen: Tergites 1-5 with even-sided medial yellowish stripe, lateral third red brown.

Male terminalia: Lateral surstylus broad basally, gradually tapering to slightly acute apex; elongate, section apical to apex of medial surstylus 1.45-1.80 times as long as basal section; similar to grandis in lateral view. Proctiger with distinct lateral fold; sclerotized part narrowly divided into 3 sections. Phallus 4.90 mm long; 1.26 times as long as mesonotum. Glans 0.60-0.62 mm long, relatively stout; acrophallus relatively strong, stout and distinctly convoluted apically.

Female terminalia: Oviscape 3.30-3.95 mm long; 0.90-1.03 times as long as mesonotum. Eversible membrane with dorsobasal scales in triangular pattern; 6-7 large hooklike scales in broadest row; largest scales 0.12 mm long. Aculeus 3.00 mm long; shaft 0.13-0.14 mm wide at midpoint, sides parallel; tip 0.23 mm long, 0.09-0.10 mm wide, apical three-fifths serrate, sides slightly concave, dorsal surface with large basal lobe on each side. Spermathecae ovoid.

Egg (based on several dissected from abdomen of female from Venezuela: Caura Val.): Very similar to that of A. grandis (Steck & Wharton 1988). Length 1.90-2.02 mm. Broadest diameter 0.22-0.26 mm. Elongate, distinctly curved; slender, especially apical (non-micropyle) half, broadest at basal third.