Orthostigma (Whartonstigma) gallowagi Wharton, 2002

Peris-Felipo, Francisco Javier & Belokobylskij, Sergey A., 2020, Whartonstigma subgen. nov., a new subgenus of the genus Orthostigma Ratzeburg 1844 from Australasia (Hymenoptera: Braconidae: Alysiinae), Zootaxa 4845 (3), pp. 410-424 : 413-414

Orthostigma (Whartonstigma) gallowagi Wharton, 2002

( Figs 4 , 5 )

Orthostigma gallowagi Wharton, 2002: 94 ; Yu et al., 2016.

Material examined. Australia: 1 female (holotype), Queensland, Wongabel S. F., 6 km S of Atherton , 12.xi– 1.xii.1983, Storey and Brown. M.T. ( QMBA) ; 1 female, 1 male (paratypes), same data as holotype [No.111581] ( ANIC) .

Re-description. Female (holotype).

Length. Body 1.6 mm, fore wing 1.6 mm, hind wing 1.1 mm.

Head. In dorsal view, 1.7 × as wide as long, 1.4 × as wide as mesoscutum, smooth, with temple rounded behind eyes. Eye in lateral view 1.3 × as high as wide and 1.8 × as wide as temple medially. POL equal to OD; OOL 2.5 × OD. Face 1.6 × as wide as high, with sparse setae, almost entirely smooth; inner margins of eyes subparallel. Clypeus 3.0 × as wide as high, slightly concave ventrally. Paraclypeal fovea small, not reaching half distance between clypeus and inner border of eye. Mandible almost parallel-sided, 1.5 × as long as its maximum width; its middle tooth narrow and rather long, directed forwards, lower tooth evenly curved on outside margin. Antenna with 16 antennomeres, 0.7 × as long as body. Scape 1.5 × as long as pedicel. First flagellomere 2.8 × as long as its maximum width, about as long as second flagellomere. Second flagellomere 2.4 ×, third to 12th flagellomeres 2.2–2.3 ×, 13th flagellomere 1.9 ×, and 14th (apical) flagellomere 3.0 × as long as their maximum width.

Mesosoma . In lateral view 1.2 × as long as high. Mesoscutum (dorsal view) 0.9 × as long as its maximum width, smooth. Notauli present only on vertical anterior surface of mesoscutum. Prescutellar depression (scutellar sulcus) smooth, with median carinae, about as long as its maximum width. Precoxal sulcus wide, oblique, almost smooth, not reaching anterior and posterior margins of mesopleuron. Posterior mesopleural furrow smooth. Propodeum smooth, with complete wide median longitudinal carina. Propodeal spiracles very small, its diameter 0.2 × distance from spiracle to anterior margin of propodeum.

Wings. Length of fore wing 3.1 × its maximum width. Marginal cell ending on apex of wing, 4.6 × as long as its maximum width. Vein SR1 3.2 × as long as vein 3-SR. First subdiscal cell 4.0 × as long as its maximum width. Hind wing 6.9 × as long as its maximum width.

Legs. Hind femur 4.5 × as long as its maximum width. Hind tibia weakly widened to apex, 7.7 × as long as its maximum subapical width, about as long as hind tarsus. First tarsomere of hind tarsus 2.0 × as long as second tarsomere.

Metasoma. First tergite almost parallel-sided, 2.8 × as long as its apical width, weakly striate. Ovipositor 1.5 × as long as first tergite, 0.4 × as long as metasoma, 1.1 × as long as hind femur.

Colour. Body dark brown. Metasoma, mandible, flagellomeres, pterostigma, and legs light brown. First metasomal tergite darker than second and third tergites. Wings almost hyaline.

Variation. Body length 1.3–1.5 mm, fore wing 1.4–1.6 mm, hind wing 1.0– 1.1 mm. Antenna 15–16 antennomeres. Mandible 1.5–1.6 × as long as its maximum width. First tergite 2.5–2.8 × as long as its apical width. Mesosoma 1.2–1.3 × as long as high. Otherwise similar to holotype.

Male. Body length 1.5 mm, fore wing 1.6 mm, hind wing 1.1 mm. Antenna 17–18 antennomeres. Otherwise similar to female.

Comparative diagnosis. The species is similar to Orthostigma (Whartonstigma) papuae sp. nov. ( Papua New Guinea), but differs from it in having the clypeus 3.0 × as wide as high (2.0 × in O. papuae ), mandible 1.5 × as long as its maximum width (1.1–1.2 × in O. papuae ), marginal cell of fore wing 4.6 × as long as its maximum width (4.0 × in O. papuae ), propodeum with complete wide median longitudinal carina, without emerging carinae (with short emerging carinae and not reaching propodeal edges in O. papuae ), and first tergite 2.8 × as long as its apical width (2.0 × in O. papuae ) almost parallel-sided (widened towards apex in O. papuae ).

Distribution. Australia.

Figures

FIGURE 4. Orthostigma (Whartonstigma) gallowagi Wharton, 2002 (holotype, female). A. Habitus, lateral view. B. Head and mesosoma, lateral view. C. Mandible. D. Antenna. E. Head, front view. F. Head and mesonotum, dorsal view.

FIGURE 5. Orthostigma (Whartonstigma) gallowagi Wharton, 2002 (holotype, female). A. Propodeum. B. Legs, metasoma and ovipositor, lateral view. C. First metasomal tergite. D. Fore and hind wings.