Gasteruption tenue Kieffer, 1922

Macedo, Antonio Carlos Cruz, 2011, A revision of Gasteruption Latreille (Hymenoptera: Gasteruptiidae) in the Neotropical Region 3030, Zootaxa 3030 (1), pp. 1-62 : 50-52

Gasteruption tenue Kieffer, 1922 ( Fig. 23 )

Gasteruption tenue Kieffer, 1922: 208 (description); Hedicke, 1939: 36 (catalog); De Santis, 1967: 95 (catalog).

Diagnosis. Differs from G. loiaconoae by the propleuron longer than or as long as the pronotum ( Fig. 23e ); the head longer than wide ( Fig. 23a ); and the fore wing discal cell subtriangular or petiolate (as in Figs. 1i–j ). Differs from other Neotropical species by the mesepisternum rugulose ventrally, usually without defined areoles ( Fig. 23d ); the mesoscutum rugulose, without punctation ( Fig. 23c ); the hind tibia entirely dark brown; the ovipositor sheath longer than the metasoma, and dark brown, with apex yellow brown ( Fig. 23e ); and the fore wing discal cell present.

Redescription. Female ( Fig. 23e ). Length: 10.4 mm (7.2–13.9 mm) (n=27); ovipositor sheath length 0.83 (0.71–1.06) × body length.

Head. Subtrapezoidal in dorsal view, longer than wide ( Fig. 23a ), imbricate; mandible pre-apical tooth distinct; malar space short, almost separated from gena; posterior ocellus inserted behind or at the level of upper eye margin; occipital carina relatively wide dorsally and laterally ( Fig. 23b ). Head length 1.42 (1.29–1.53) × eye length; eye length 22.37 (15.25–30.00) × malar space; distance from posterior ocellus to occipital margin 1.90 (1.55–2.67) × distance between posterior ocelli; 1 st flagellomere 1.04 (0.91–1.25) × as long as scape, 1.30 (1.11– 1.71) × as long as pedicel, 0.46 (0.33–0.67) × as long as 2 nd flagellomere. Color: black, clypeus with anterior portion lighter than remaining, antenna dark brown.

Mesosoma. Propleuron imbricate; pronotal process distinct to short; pronotum imbricate, area between lobes rugulose; mesonotum rounded in lateral view ( Fig. 23d ); mesoscutum and mesoscutelum rugulose ( Fig. 23c ); mesepisternum rugulose dorsally and rugulose (rarely areolate) ventrally; mesepimeron scrobiculate; metapleuron rugulose to areolate, ventral region with a reduced smooth or rugulose portion; propodeum areolate, longitudinal carina distinct to ill-defined; metacoxa without transversal striae. Mesosoma (excluding propleuron) 2.12 (1.88– 2.66) × as long as high; propleuron 1.97 (1.61–2.42) × longer than its largest wide, 1.11 (1.00–1.28) × pronotum length; metacoxa 2.48 (2.00–2.92) × as long as wide; metatibia 4.13 (3.65–4.59) × as long as wide, 1.47 (1.42– 1.54) × as long as femur, 3.35 (2.94–3.66) × as long as 1 st tarsomere. Fore wing discal cell subtriangular or petiolate; hind wing with 3 hamuli, not or equidistant. Color: propleuron and mesonotum black; pronotum yellow brown to red brown; mesepisternum black, mesepimeron and metapleuron yellow brown to black; propodeum black dorsally to yellow brown ventrally (or entirely black); fore and middle legs with coxa, trochanter, femur and tibia red brown, tibia with a yellow longitudinal stripe, 1 st tarsomere yellow brown, remaining tarsomeres yellow brown to dark brown; hind leg with coxa, trochanter, femur and tibia dark brown, subbasal portion of tibia yellow, tarsus dark brown.

Metasoma. Imbricate, 2.72 (2.43–2.90) × as long as mesosoma; subgenital sternun notched, Y-shaped; ovipositor sheath 1.36 (1.23–1.54) × as long as metasoma. Color: dark brown; ovipositor sheath dark brown, with apex yellow brown.

Male. Similar to female.

Geographic distribution: Argentina (Buenos Aires, Córdoba, Entre Ríos, La Rioja, Mendoza, Salta, Santiago del Estero , Tucumán) .

Material examined. Two female syntypes examined by digital images ( MACN): ARGENTINA: Córdoba : Alta Gracia, La Granja, I.1922, C. Bruch .

Other material. ARGENTINA: Buenos Aires: La Plata, 27.I.1966, 29.I.1966, 30.I.1966, H. & M. Townes, 3♀, 1♂ ( AEIC) ; Andalhuallas , 20.II.1967, A. Willink, 1♀ ( IMLA) ; Andalhuallas , 2000 m, 19.I.1968, R. Golbach, A. Terán & A. Willink, 1 unknown gender ( IMLA) ; Ata. Maria , 19.I.1968, R. Golbach, A. Terán & A. Willink, 1♂ ( IMLA) ; La Ciénaga , 21–22.XI.1967, A. Terán & L.A. Stange, 1♂ ( IMLA) ; Los Nacimíentos de Abajo , 16– 20.XI.1966, 16–31.X.1968, 1–15.XI.1968, 16–30.XI.1968, 16–31.XII.1968, 1–15.I.1969, 16–31.I.1969, 16– 28.II.1969, A. Willink, A. Terán & L.A. Stange, 8♀, 11♂ ( IMLA) ; Punta Balasto , 30 km Sta Maria, 24.XI.1966, 24.XI.1966, 24.XII.1966, 4.XII.1966, A. Willink, 3♂, 1 unknown gender ( IMLA) ; Entre Ríos: Pronunciamiento , XI.1963, XII.1963, II.1965, 1♀, 2♂ ( CNCI) ; La Rioja: La Rioja, E. Giacomelli, 2♀, 1♂ ( USNM) ; Mendoza: Chacras de Coria , 29.I.1973, A. Willink, 1♀ ( IMLA) ; Potrerillos , 16–20.III.1920, Cornell Univ. Exp., 1♀ ( USNM) ; Salta: Famatina , 13.XI.1969, L.A. Stange, A. Willink & A. Terán, 1♀ ( IMLA) ; Tacuil , 2400 m, 16–31.XII.1968, A. Willink, A. Terán & L.A. Stange, 2♀ ( IMLA) ; Tartagal , I.1972, M. Fritz, 1♂ ( AEIC) ; Yacechuya cerca de Cafayate , X.1971, 8.X.1971, 9.X.1971, C. Porter & L.A. Stange, 6♂ ( IMLA) ; Yacochuya, Cafayete , 1950 m, 1– 15.XI.1968, 16–31.XII.1968, 1–15.I.1969, 16–31.III.1969, A. Willink, A. Terán & L.A. Stange, 1♀, 3♂ ( IMLA) ; Santiago del Estero : Los Tigres , 10.IX.1973, R. Golbach, 1♀, 3♂ ( IMLA) ; Tucumán: Amaicha , 19.XI.1966, 20.XI.1966, L.A. Stange, 5♀, 4♂ ( IMLA) ; Amaicha del Valle , 8.XI.1959, H. Rossi, 1♀ ( IMLA) ; Amaicha del Valle , 29.XII.1965, H. & M. Townes, 1♂ ( AEIC) ; San Pedro de Calalao , I.1952, J.M. Arnau, 1 unknown gender ( IMLA) ; San Pedro de Colalao , 22.X.1966, L.A. Stange & A. Terán, 1♂ ( IMLA) ; San Pedro de Colalao , 8.XI– 8.XII.1967, L.A. Stange, 1♀, 2♂ ( AEIC) ; Trancas , I.1949, J.M. Arnau, 1♀ ( IMLA) ; Trancas, Tacanas , 1– 30.XI.1968, L.A. Stange, 1♂ ( IMLA) .

Comments. Gasteruption tenue Pasteels, 1957a is a junior homonym of G. tenue Kieffer (see “New replacement name for G. tenue Pasteels ”).

Figures

FIGURE 1. a: Gasteruption bispinosum, habitus (scale bar: 1.0 mm); b: G. rafaeli, left fore wing (scale bar: 1.0 mm); c–m: Discal cell of left fore wing (without scale); c–e: G. bispinosum; f: G. hansoni; g–h: G. huberi (female and male); i–m: G. parvum.

FIGURE 23. Gasteruption tenue. a: head in dorsal view; b: head in lateral view; c: mesonotum in dorsal view; d: mesosoma in lateral view; e: habitus. Scale bar: 1.0 mm.