Trichogramma acuminatum Querino & Zucchi 2003, new species
Creators: name: Querino, R. B.
name: Zucchi, R. A.
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Trichogrammatidae
Trichogramma
Trichogramma acuminatum

description: Trichogramma acuminatum Querino & Zucchi, new species (Figures 1a, 2a)
Antenna: flagellum long (0.15­0.17); ratio of the length to width of flagellum (6.73­8.30); flagellum length to hind tibial length (1.06­1.14); flagelliform setae long (0.08), evenly tapering to apex; longest flagelliform setae length to flagellum width (3.82­4.00); basiconic sensilla ovaliform, with formula 2­2­2­0­1­1; three placoid sensilla, the basal one 0.04. Forewing: width to length ratio of forewing (0.51­0.52); fringe setae length (0.04); fringe setae length to hind tibial length (0.25­0.29); fringe setae length to forewing width (0.15); 8­10 setae between the 4 th and 5 th setal tracks. Hind wings: anterior track absent; posterior track with 4­6 setae, reaching the mid­point of the middle track. Scutellum: anterior setae short and fine; ratio of anterior to posterior pair (0.11­0.14). Male genitalia: genital capsule longer (0.12) than wide (0.04); ratio of the width to length of genital capsule (0.32­0.34); apical distance to genital capsule length (0.24­0.25); apical width to genital capsule width (0.70­0.79); dorsal lamina originating anterior to middle of genital capsule without basal notching; dorsal lamina gradually tapers from base to apex; posterior extension of the dorsal lamina length (0.03­0.04); dorsal lamina length to dorsal lamina width (1.35­1.59); dorsal lamina length to genital capsule length (0.39­0.47); dorsal aperture length to dorsal lamina length (1.15­1.43); posterior extension of the dorsal lamina length to dorsal lamina length (0.67­0.74); dorsal ridge absent; ventral ridge indistinct, reaching the middle of the genital capsule (0.03­0.04); ventral ridge length to basal distance (0.34­0.43); basal distance to genital capsule length (0.75­0.76); ventral processes near base of intervolsellar process; intervolsellar process elongate, reaching half of the length of volsellae (0.008). Quantitative data were obtained from two males.
TYPE MATERIAL ­ Holotype male. BRASIL. SÃO PAULO. Piracicaba, Tupi (forest reserve), suction trap, R.B. Querino collr. (ESALQ). One paratype (male) with same data as holotype (UCR).
DIAGNOSIS ­ The triangular aspect of the dorsal lamina, without basal notching, posterior extension with a pointed apex and intervolsellar processes elongate reaching the half of the length of volsellae allow recognition of Trichogramma acuminatum. These characters separate T. acuminatum from other South American species, but it can be confused with T. tupiense. However, T. acuminatum differs from T. tupiense by having more elongate intervolsellar process and placement of the ventral processes close to the base of the intervolsellar process. In T. tupiense, the intervolsellar is relatively short and placement of the distinct ventral processes at or very near the base of the intervolsellar process.
ETYMOLOGY ­ The scientific name is a Latin adjective acuminatum for sharp, in reference to the pointed apex of the dorsal lamina of the male genitalia.
description: Published as part of Querino, R. B. & Zucchi, R. A., 2003, Six new species of Trichogramma Westwood (Hymenoptera: Trichogrammatidae) from a Brazilian forest reserve, pp. 1-11 in Zootaxa 134 (1) on pages 2-5, DOI: 10.11646/zootaxa.134.1.1, http://zenodo.org/record/5014197