Trichogramma

Vieira, Jaci M., Querino, Ranyse B. & Zucchi, Roberto A., 2014, On the identity of Trichogramma demoraesi Nagaraja (Hymenoptera: Trichogrammatidae), with a checklist and a key to Trichogramma species associated with Erinnyis ello (L.) (Lepidoptera, Sphingidae) in Brazil, Zootaxa 3869 (1), pp. 83-89 : 88

A key to the species of Trichogramma

that parasitize Erinnyis ello in Brazil

1. Setae on flagellum of antenna short; length of longest setae less than 2.0x flagellar width............................ 2

1’. Setae on flagellum of antenna longer; length of longest setae more than 3.0x flagellar width.......................... 3

2. Genital capsule dorsal lamina with distinct lateral lobes, extending beyond genital capsule margins; intervolsellar process distinct and short, generally with apical constriction ( Figs 2A, B ); flagellum setae short, tapering abruptly at apex, length of longest flagelliform seta <1.5x width of flagellum ( Fig. 4A )........................................... T. manicobai

2'. Genital capsule, dorsal lamina with no lateral lobes; intervolsellar process long and stout, with apex truncated or acute ( Fig. 2C, D ); flagellum setae short, tapering abruptly at apex, length of longest flagelliform seta <1.7x width of flagellum ( Fig. 4B )........................................................................................ T. marandobai

3. Genital capsule broad, with broad dorsal lamina, not tapering distinctly from base to apex; posterior extension of dorsal lamina short, obsolescent; dorsal carina present; ventral carina distinct; parameres broad and arcuate laterally; volsella curved, with distinct lateral constriction, lateral surface broadly bulged; intervolsellar process short and triangular; ventral processes distinctly tubular on intervolsellar process ( Figs 3A, B ); flagellum setae elongate, length of longest flagelliform seta> 3.0x width of flagellum ( Fig. 4C )....................................................................... T. atopovirilia

3’. Genital capsule not broad, dorsal lamina gradually narrowing from base to apex; posterior extension of dorsal lamina weakly sclerotized with apex of posterior extension difficult to distinguish under light microscopy; dorsal carina absent; ventral carina short, indistinct, not reaching midlength of genital capsule; parameres relatively straight; volsella slightly bowed; intervolsellar process long and slender with acute apex; ventral processes positioned near base of intervolsellar process ( Figs 3C, D ); flagellum setae elongate, gradually tapering to apex, length of longest flagelliform seta> 3.0x width of flagellum ( Fig. 4D )................................................................................................ T. pretiosum

Figures

FIGURE 2. Genital capsule (male). A, B. Trichogramma manicobai; C, D. Trichogramma marandobai (A, C ventral view; B, D dorsal view, 40x).

FIGURE 3. Genital capsule (male). A, B. Trichogramma atopovirilia; C, D. Trichogramma pretiosum (A,C ventral view; B,D, dorsal view, 40x)

FIGURE 4. Antenna (male). A. Trichogramma manicobai; B. Trichogramma marandobai; C. Trichogramma atopovirilia; D. Trichogramma pretiosum (10x).