Pest Fruit Flies of the World – Larvae
Anastrepha nunezae Steyskal
Body length 8–12mm (range estimated, LEC scored as 10); 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 13–15. Elongate, finger-like lobes arising above mandibles absent (assumed). 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 (? "first & second segments behind anterior spiracle"; ventral spinules up to 40 microns long).
Caudal segment (a8) and anal lobes. 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.
Anterior spiracles. Anterior spiracle elevated, margin concave medially, appearing bilobed (recurved at each end). Anterior spiracular tubules 20–22; in a single uniform row, or in a single irregular row (?).
Posterior spiracles. Posterior spiracular area not distinctly set off from caudal segment. Posterior spiracles: average length of dorsal and ventral rimae 88–100µm; slits 3–3.5x longer than wide (from fig.). 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 (long processes). Number of dorsal spiracular processes 7–11 (range estimated, LEC coded 9). Number of ventral spiracular processes 7–9 (range estimated, LEC coded 8). Number of lateral spiracular processes 6–8. Basal width of spiracular processes 12–20µm (range estimated, LEC coded 16, measured from fig.). Dorsal and ventral spiracular processes: ratio of number of tips to number of trunks 1–1.7 (range estimated, LEC coded 1.35). Area between posterior spiracles smooth (?).
Host plants. Bombacaceae (Matisia cordata H&B).
Part of plant attacked: fruit.
Biogeographic region. Neotropical.
Specimens examined. Based on description by Steyskal (1977; Colombia: Departamento de Cundimarca, Cachipay, 10 December 1973, L. Nunez, reared from fruit of Matisia cordata HB).
Sources of data and SEM numbers: Steyskal.
Illustrations. • Posterior spiracle.
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’.