Pest Fruit Flies of the World – Larvae

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

Rhagoletis cerasi (Linnaeus)

Musca cerasi Linnaeus, Rhagoletis cerasi f. obsoleta Hering, Trypeta signata Meigen, Urophora cerasorum Dufour, Urophora liturata Robineau-Desvoidy

European cherry fruit fly. Body length 4.5–6.5mm (range estimated, LEC coded as 5–6); elongate-cylindrical (?). Integument unsclerotized, entirely whitish to yellowish. Caudal ridge absent. Mature larvae unable to jump.

Head. Head of normal shape; cephalic lobes slightly developed. Antenna 2-segmented. Stomal organ: primary lobe rounded, protuberant; number of peg sensilla one; peg sensilla unbranched; other peg-sensilla-like structures absent. Stomal region: secondary lobes absent; sclerotized stomal guards present; number of sclerotized stomal guards 4–6 (6~LEC; strong, sharply pointed~WEH;4–5 dark~Kandybina). Oral ridges present (very indistinct), or absent; number of oral ridges (when present) 3–4 (often not discernible); margins rounded, more like reticulation than ridges. Accessory plates absent (?). Elongate, finger-like lobes arising above mandibles absent. Median oral lobe absent or not protruding. Labium broad.

Cephalopharyngeal skeleton. Mandibles: subapical teeth present; tooth smaller than apical tooth, and very stout; with a single ventral tooth (?); 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 with an unusual distribution (T2-A8, none on T1).

Caudal segment (a8) and anal lobes. Sensilla on caudal segment 10 pairs, with at least 7 pairs visible under dissecting microscope (?). Intermediate caudal sensillum I2 obvious (?). Intermediate caudal sensilla I1a&b and I2 on a single tubercle (?). Ventral caudal sensilla obvious, on a papilla or tubercle (?). Anal lobes very protuberant; grooved, or bifid (?).

Anterior spiracles. Anterior spiracle elevated, margin convex to straight. Anterior spiracular tubules 12–16 (15–16~Phillips 1946, Kandybina 1961); 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: slits 4–5x longer than wide. Dorsal spiracular processes with a few trunks radiating from a short or semicircular base (medium processes). Number of dorsal spiracular processes 6–7. Number of ventral spiracular processes 6–7. Number of lateral spiracular processes 2–6. Area between posterior spiracles smooth.

Host plants. Caprifoliaceae (Lonicera spp.), Rosaceae (Prunus spp.).

Berberidaceae: Berberis vulgaris, Hendel 1927 (prob. misid., White & Elson Harris 1992). Vaccinium myrtillus (Ericaceae) record (from Phillips 1946) derived from 19th century data, prob. not based on rearing; not attacked ~Thiem 1934. Lycium barbarum (Solanaceae) record derived from 19th century data, prob. not based on rearing; not attacked ~Thiem 1934.

Part of plant attacked: fruit.

Biogeographic region. Palearctic.

Specimens examined. Based on specimens from Italy: vic. Portici, vi.1986, P. Fimiani (n=10) and on descriptions by White and Elson-Harris (1992; France (from canned mixed fruit) (n=2), Phillips (1946), and Kandybina (1961).

Sources of data and SEM numbers: 355SEM.

Illustrations. • Cephalopharyngeal skeleton, spiracles, caudal segment. • Head (anteroventral), antenna. • Head (anteroventral) SEM. • Stomal organ SEM. • Head (lateral) SEM. • Anterior spiracle SEM. • Caudal segment (posterior) SEM. • Posterior spiracles SEM. • Caudal segment (posterior) SEM. • Anal lobes SEM.


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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