Gasteruption wahli, Macedo, 2011

Macedo, Antonio Carlos Cruz, 2011, A revision of Gasteruption Latreille (Hymenoptera: Gasteruptiidae) in the Neotropical Region 3030, Zootaxa 3030 (1), pp. 1-62 : 56-58

Gasteruption wahli n. sp. ( Fig. 26 )

Etymology. The epithet for this species is in honor of Dr. David Wahl, curator of the American Entomological Institute.

Diagnosis. Differs from G. barnstoni by the mesoscutum punctate rugulose ( Fig. 26c ); and the head wider than long ( Fig. 26a ). Differs from G. helenae by the metacoxa finely striate; the head wider than long; the propleuron with irregular striae; and the pronotum with the area between lobes usually crenulate (well-defined sculpture) ( Fig. 26d ). Differs from other Neotropical species by the occipital carina narrow dorsally and laterally ( Fig. 26b ); the mesepisternum ( Fig. 26d ) and the propodeum areolate; the ovipositor sheath longer than the metasoma, and dark brown, with apex yellow brown ( Fig. 26e ); and the fore wing discal cell present.

Description. Female ( Fig. 26e ). Length: 15.7 mm (14.5–17.0 mm) (n=2); ovipositor sheath length 1.00 (0.90– 1.00) body length.

Head. Subtrapezoidal in dorsal view, wider than long ( Fig. 26a ), punctulate, with fine irregular striae in vertex; mandible pre-apical tooth distinct; malar space short, almost separated from gena; posterior ocellus inserted at the level of upper eye margin; occipital carina narrow dorsally and laterally ( Fig. 26b ). Head length 1.24 (1.21–1.27) eye length; eye length 17.00 (16.00–18.00) malar space; distance from posterior ocellus to occipital margin 1.72 (1.56–1.88) distance between posterior ocelli; 1 st flagellomere 1.29 (1.25–1.33) as long as scape, 1.59 (1.36–1.82) as long as pedicel, 0.65 (0.63–0.67) as long as 2 nd flagellomere. Color: black, antenna black to dark brown.

Mesosoma. Propleuron imbricate, with irregular striae; pronotal process distinct; pronotum imbricate rugulose, area between lobes crenulate; mesonotum rounded in lateral view ( Fig. 26d ); mesoscutum punctate rugulose (with fine irregular striae in some specimens) ( Fig. 26c ); mesoscutelum punctate rugulose; mesepisternum rugulose dorsally and areolate ventrally; mesepimeron scrobiculate; metapleuron areolate, ventral region rugulose; propodeum areolate, longitudinal carina indistinct; metacoxa finely striate. Mesosoma (excluding propleuron) 1.87 (1.78–1.96) as long as high; propleuron 1.50 (1.44–1.56) longer than its largest wide, 0.96 (0.92–1.00) pronotum length; metacoxa 3.14 (2.71–3.57) as long as wide; metatibia 5.38 (5.04–5.73) as long as wide, 1.42 (1.40–1.45) as long as femur, 2.74 (2.71–2.77) as long as 1 st tarsomere. Fore wing discal cell subtrapezoidal; hind wing with 3 hamuli, not equidistant. Color: propleuron and mesonotum black; pronotum, mesopleuron and metapleuron black (or with some red-brown parts); propodeum black; fore and middle legs with coxa, trochanter, femur and tibia dark brown, tibia with or without a yellow longitudinal stripe, tarsus dark brown (or partially yellow) in basal tarsomeres and dark brown in apical tarsomeres; hind leg with coxa black, trochanter, femur and tibia dark brown, subbasal portion of tibia yellow, 1 st tarsomere yellow, with base dark brown, 2 nd –3 rd yellow, 4 th –5 th dark brown.

Metasoma. Imbricate, 3.25 (3.13–3.38) as long as mesosoma; subgenital sternun notched, Y-shaped; ovipositor sheath 1.45 (1.41–1.48) as long as metasoma. Color: dark brown; ovipositor sheath dark brown, with apex yellow brown.

Male. Similar to female; hind tarsus entirely dark brown.

Geographic distribution: Argentina (Tucumán), Brazil (São Paulo).

Material examined. Holotype, female ( AEIC): BRAZIL: São Paulo: São José do Barreiro, Serra da Bocaina , 1650 m, XI.1969, M. Alvarenga & Seabra.

Paratypes: ARGENTINA: Tucumán: Villa Nougués , 13–17.I.1966, H. & M. Townes, 1♀ ( AEIC); BRA- ZIL : São Paulo: São José do Barreiro, Serra da Bocaina , 1650 m, XI.1968, M. Alvarenga & Seabra, 1♂ ( AEIC) .

Other material. ARGENTINA: Tucumán: Villa Nougués , 21.I.1931, unknown gender ( IMLA); Yerba

Buena, I.1931, unknown gender ( IMLA).

Figures

FIGURE 26. Gasteruption wahli. 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.