Trichogramma piracicabense Querino & Zucchi

Querino, Ranyse B., Mendes, Jaci V., Costa, Valmir A. & Zucchi, Roberto A., 2017, New species, notes and new records of Trichogramma (Hymenoptera: Trichogrammatidae) in Brazil, Zootaxa 4232 (1), pp. 137-143 : 138-139

Trichogramma piracicabense Querino & Zucchi sp. nov.

Figs 1–4

Diagnosis. Trichogramma piracicabense is easily distinguished by the funnel-shaped dorsal lamina with narrower posterior extension. Genital capsule with sides typically gradually convergent posteriorly, not constricted at level of IVP. Intervolsellar process short. Ventral process positioned anterior to base of intervolsellar process and ventral process relatively distant from each other. Apical distance relatively long.

Description. Male. Based on field-collected specimens from the host. Quantitative data taken from three males (HTL = 110.8 ± 2.2 µm). Color of mounted specimens brown.

Antenna. Flagellum relatively short (121.8 ± 2.4), twice as long as scape (60.6 ± 4.1), FL/FW = 5.64 ± 0.15, FL/HTL = 1.10 ± 0.0; flagelliform setae long (75.4 ± 3.3), evenly tapering to apex, ca 3.5x FW, FSL/FW = 3.48 ± 0.09; basiconic sensilla ovaliform, formula 2-2-2-0-1-1; three placoid sensilla, terminal PLS = 29.0 ± 1.9 with apical sensillum extending beyond apex of flagellum 6.0 ± 1.2.

Wings. Forewing slightly infuscate; FWW/FWL = 0.51 ± 0.01; fringe setae =32.3 ± 1.3, 0.22 FWW, ca. 0.29 x HTL; 7–10 setae between 4th and 5th setal tracks. Hind wing with anterior track absent, posterior track with 3 to 4 setae, not reaching midpoint of middle track.

Scutum/Scutellum. Smooth, microsculpturing indistinct. Scutellum with anterior pair of setae 4.6 length of posterior pair.

Genital capsule. 0.39 ± 0.0 as wide as long, usually widest slightly anterior to middle; sides typically gradually convergent posteriorly, not constricted at level of IVP; PM slightly convergent; AD elongate, AD/GL = 0.27 ± 0.01; AW/GW = 0.65 ± 0.01; DA elongate, DA/GL = 0.27 ± 0.01; DLA originating near middle of capsule, funnelshaped, divided into two parts, a wider basal section and a narrower long (31.7 ± 0.5) posterior extension with rounded apex exceeding apex of VS. DLA notched laterally at base, shoulders present and not approaching GC, sides gradually tapering apically, forming sublinguiform posterior extension whose width at level of IVP is less than that of aedeagus; DLA 1.26 ± 0.01 as long as wide, DLA/GL = 0.46 ± 0.01; VS relatively straight, symmetrical; IVP short, pointed apically, occupying 0.2 AD; VR short (25.2 ± 0.01), occupying 0.33 BD (anterior limits difficult to discern in mounted specimen); VP positioned anterior to base of IVP and far from VR and each other; AL ca. 0.57 length of apodemes, AL/HTL = 0.39 ± 0.02; apodemes 1.75 AL.

Type material. Holotype: male, BRAZIL. SÃO PAULO: Piracicaba (22°42'30"S, 047°38'00"W, 546 m a.s.l.), x/2002, ex eggs Heraclides astyalus on Citrus sp., J. A. Cerignoni collr. ( ESALQ) . Paratypes: 2 males, same data as holotype ( ESALQ) .

Distribution. Known only from the type locality.

Host. Heraclides astyalus (Papilionidae) on Citrus sp.

Etymology. The species epithet is an adjective derived from the type locality.

Remarks. In the key of Querino & Zucchi (2005), Trichogramma piracicabense runs to T. pratissolii Querino & Zucchi or T. zucchii Querino , from which it differs in having shorter flagelliform setae, a funnel-shaped dorsal lamina, and a shorter ventral ridge. This new species also somewhat resembles T. bruni , but differs in having the posterior extension of the dorsal lamina narrower and the ventral processes widely separated and near the base of the intervolsellar process, and shorter flagelliform setae.

Figures

FIGURES 1 – 4. Trichogramma piracicabense Querino & Zucchi sp. nov. Male. 1: Antenna; 2: Wings; 3: Genital capsule, ventral view; 4: Genital capsule, dorsal view.