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Anastrepha and Toxotrypana:
descriptions, illustrations, and interactive keys

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Allen L. Norrbom, Cheslavo A. Korytkowski, Roberto A. Zucchi, Keiko Uramoto, George L. Venable, Jerrett McCormick and Michael J. Dallwitz

Anastrepha atrigona Hendel

Morphology

Body. Setae dark red brown, or dark brown to black.

Head. Frons without brown markings except ocellar tubercle. Occiput without brown marks. Frontal setae 4–5. Orbital setae 2. Ocellar seta weak, small or absent. Gena without brown spot. Facial carina in profile concave or flat on dorsal 2/3. Face with ventral part gradually tapered laterally; without brown markings. Antenna not extended to ventral margin of face.

Thorax. Mesonotum length 3.3–4.08 mm. Postpronotal lobe and notopleuron entirely microtrichose. Scutum mostly or entirely microtrichose. Postpronotal, presutural supra-alar, dorsocentral, intra-alar and scutellar setae well developed, subequal to or longer than scutellum length; postpronotal seta on posterior half of postpronotal lobe. Acrostichal seta well developed. Basal scutellar seta strong, longer than scutellum. Katepisternal seta weak, no larger than postocellar seta, or absent. Mesonotum orange, or dark orange, or orange brown. Scutum presutural dorsocentral pale vitta absent; with 3 (both medial and sublateral) pale postsutural vittae; pale medial vitta narrow posteriorly, not expanded, or with posterior end ovoid (not extended laterally beyond acrostichal seta); pale sublateral postsutural vitta extended posteriorly to intra-alar seta. Scutum posteriorly without brown or orange brown markings. Scutum without brown vittae, or with dark brown dorsocentral vitta (rarely, poorly differentiated if present); dark brown scutal setulae between brown dorsocentral vitta and yellow sublateral vitta continuous, evenly distributed, without large non-setulose areas. Scutellum entirely yellow or with dark markings only on extreme base of disk. Subscutellum yellow to red brown medially, dark brown laterally. Mediotergite yellow to red brown medially, dark brown laterally.

Wings. Wing length 7.5–9.22 mm. Wing pattern typical Anastrepha pattern (S-band complete or at most interrupted at crossvein r-m, C-band and at least proximal arm of V-band present). C-band broadly extending to vein M in cell br along cell bm; covering base of cell r2+3. C-band and S-band broadly connected along costal margin (connection extending to vein R4+5). Basal hyaline area between C-band and S-band extended into cell br but not reaching vein R4+5, or not extended into cell br. S-band extended anteriorly to vein R4+5 and covering all of crossvein r-m. Cell bm entirely hyaline or infuscated only along subapical fold (infuscated, but fainly yellowish), or entirely infuscated. S-band base without extension in middle of cell cu1 to posterior wing margin; without extension in cell a1 to or almost to posterior margin. Subapical hyaline area in radial cells distal to r-m extending anteriorly to vein R2+3. S-band distal section without marginal hyaline band or spots in cell r2+3 or near apices of R2+3 or R4+5. S-band distally not extended to apex of vein M. V-band proximal arm as dark as apical half of S-band; connected anteriorly to S-band along vein R4+5 or in cell r2+3; not connected to S-band in cell dm, or connected to S-band in cell dm. V-band distal arm absent. Vein R2+3 not sinuous; without accessory vein. Vein R4+5 distal to crossvein r-m more or less evenly curved or not strongly bowed medially. Vein M ratio (distance from bm-cu to r-m/distance from bm-cu to dm-cu) 0.72–0.8 (0.74–0.79). Crossvein dm-cu orientation with anterior end more distal than posterior end.

Abdomen. Abdominal tergite without brown markings. Epandrium posterodorsal margin evenly rounded. Lateral surstylus in posterior view without basolateral lobe. Phallus length 5.1–5.76 mm; ratio (phallus length/mesonotum length) 1.38–1.49. Glans present; without spinules. Oviscape straight; length 3.7–4.45 mm; length ratio (oviscape length/mesonotum length) 1.08–1.18. Eversible membrane with dorsobasal denticles all sclerotized, in continuous triangular to semicircular or suboval pattern. Aculeus length 3.55–4.4 mm. Aculeus in ventral view more or less parallel-sided except extreme base. Aculeus tip length 0.35–0.44 mm (0.37–0.42); width 0.13–0.14 mm; lateral margins not curved dorsally; not flared outward at or proximal to base; without ridges or lobes; without elongate dorsolateral depressions apically; not serrate; serrated part 0 times length of tip. Spermathecae sclerotized.

Miscellaneous

Sex of recorded specimens: male and female. Species group: grandis group.

Biology and economic significance

This species is not considered economically important. Refer to the Fruit Fly Databases for host plant information.

Illustrations

• Habitus, female (dorsal). • Wing. • Terminalia, male & female.

Links

Fruit Fly Databases for host plant, distribution, and nomenclatural information. Google search.