Pest Fruit Flies of the World – Larvae

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L.E. Carroll, A.L. Norrbom, M.J. Dallwitz, and F.C. Thompson

Anastrepha interrupta Stone

Schoepfia fruit fly. Body length 5.8–9.3mm; stout, elongate, tapering anteriorly (truncate caudal end, tapered thorax). Integument unsclerotized, entirely whitish to yellowish. Caudal ridge absent. Mature larvae unable to jump.

Head. Head of normal shape; cephalic lobes ?. Antenna 2-segmented. Stomal organ: primary lobe large, elongate-rounded (?); other peg-sensilla-like structures ?. Stomal region: secondary lobes absent (?); sclerotized stomal guards absent. Oral ridges present; number of oral ridges 13–20 (occ.13–14usu. 15–20). Elongate, finger-like lobes arising above mandibles absent (?). Median oral lobe absent or not protruding (?). Labium broad (?).

Cephalopharyngeal skeleton. Mandibles: subapical teeth absent; base stout, nearly perpendicular to a line from ventral part of base to apex of mandible. Parastomal bars elongate, free from hypopharyngeal sclerite. Dental sclerites apparently absent, not visible in lateral view.

Spinules and creeping welts. Dorsal spinules on segments T1-T3, or T1-A1.

Caudal segment (a8) and anal lobes. Sensilla on caudal segment 10 pairs, with at least 7 pairs visible under dissecting microscope. Dorsal caudal sensilla absent or visible only with great difficulty, or obvious, sessile or on separate papillae or tubercles (?). Intermediate caudal sensillum I3 absent or visible only with great difficulty. Lateral caudal sensillum absent or visible only with great difficulty. Intermediate caudal sensilla I1a&b obvious, but not on a papilla or tubercle, or obvious, on a single papilla or tubercle, bifid apically. Intermediate caudal sensillum I2 obvious (?). Intermediate caudal sensilla I1a&b and I2 on separate papillae or tubercles. Ventral caudal sensilla absent or visible only with great difficulty, or obvious, but not on a papilla or tubercle (?). Anal lobes plainly visible, but not strongly protuberant; simple, or grooved, or bifid (usu.occ.).

Anterior spiracles. Anterior spiracle elevated, margin convex to straight, or elevated, margin concave medially, appearing bilobed. Anterior spiracular tubules 10–13; in a single uniform row (?).

Posterior spiracles. Posterior spiracular area not distinctly set off from caudal segment. Posterior spiracles: average length of dorsal and ventral rimae 67–89µm; slits 2.6–3.9x longer than wide (as published; 2.7–3.5 on data sheet). Dorsal spiracular processes with a few trunks radiating from a short or semicircular base (short to medium processes). Number of dorsal spiracular processes 4–8 (trunks; 5–11 tips). Number of ventral spiracular processes 4–7 (trunks, 4–10 tips). Number of lateral spiracular processes 3–6 (trunks; 3–8 tips). Basal width of spiracular processes 5–12µm (SPI:7–12;SPIV:5–10). Dorsal and ventral spiracular processes: average number of tips 4–11. Dorsal and ventral spiracular processes: ratio of number of tips to number of trunks 1–2. Area between posterior spiracles smooth.

Host plants. Olacaceae.

Part of plant attacked: fruit.

Biogeographic region. Neotropical.

Specimens examined. Based on description by Steck & Wharton (1988; Florida: Homestead, 3.i.1951 Schoepfia chrysophylloides berries, 51–997 SPBFLA 109425 (n=23, NMNH, with associated adults) (n=18 spreadsheet: check what from this spreadsheet was "13–20").

Sources of data and SEM numbers: (Steck & Wharton data).

Illustrations. • Cephalopharyngeal skeleton, caudal segment (posterior). • Spiracles.


Cite this publication as: ‘L.E. Carroll, A.L. Norrbom, M.J. Dallwitz, and F.C. Thompson. 2004 onwards. Pest fruit flies of the world – larvae. Version: 8th December 2006. http://delta-intkey.com’.

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