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 grandis (Macquart)

Tephritis grandis Macquart, Anastrepha latifasciata Hering, Anastrepha schineri Hendel

South American cucurbit fruit fly, Mosca da cucurbitáceas Sul Americana. Body length 8.8–17mm (~datasheets; 6.6–17.0 as published); stout, elongate, tapering anteriorly (?). Integument unsclerotized, entirely whitish to yellowish. Caudal ridge absent. Mature larvae unable to jump.

Head. Head of normal shape. 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 8–13 (usu. 9–11). 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-A3, or T1-A4, or T1-A5.

Caudal segment (a8) and anal lobes. Sensilla on caudal segment 10 pairs, with at least 7 pairs visible under dissecting microscope. Dorsal caudal sensilla obvious, sessile or on separate papillae or tubercles. Intermediate caudal sensillum I3 obvious, but not on a papilla or tubercle. Lateral caudal sensillum obvious, but not on a papilla or tubercle. Intermediate caudal sensilla I1a&b obvious, on a single papilla or tubercle, not bifid apically, 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; bifid.

Anterior spiracles. Anterior spiracle elevated, margin concave medially, appearing bilobed (may be additional smaller lobes). Anterior spiracular tubules 28–37 (usu. 31–37); in a single irregular row, or in two rows.

Posterior spiracles. Posterior spiracular area not distinctly set off from caudal segment. Posterior spiracles: average length of dorsal and ventral rimae 120–163µm; slits 3–5.3x longer than wide (3.1–5.1~datasheets). Dorsal spiracular processes with numerous trunks arising from a short or semicircular base, or with a few trunks radiating from a short or semicircular base (medium processes). Number of dorsal spiracular processes 11–22. Number of ventral spiracular processes 11–20. Number of lateral spiracular processes 6–15 (usu. 6–13). Basal width of spiracular processes 14–46µm (SPI:22–46; SPIV:14–36). Dorsal and ventral spiracular processes: average number of tips 16–36 (?;20–34~datasheets). Dorsal and ventral spiracular processes: ratio of number of tips to number of trunks 1.2–2.9 (?;0.9–2.5~datasheets). Area between posterior spiracles smooth (?).

Host plants. Cucurbitaceae, Myrtaceae.

Part of plant attacked: fruit.

Biogeographic region. Neotropical.

Specimens examined. Based on description by Steck & Wharton (1988; Brazil: Sao Paulo, ex melon culture (n=5), ex pumpkin culture (n=18); Argentina: pumpkin (intercepted 1–4–37 Houston Tex. -2003 Lot 37–521) (n=11, no associated adults; NMNH).

Sources of data and SEM numbers: 136.

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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