Orthostigma (Whartonstigma) tropicale 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 : 420-423

Orthostigma (Whartonstigma) tropicale Wharton, 2002

( Figs 10 , 11 )

Orthostigma tropicale Wharton, 2002: 95 ; Yu et al., 2016.

Material examined. Australia: 2 females (holotype and paratype), Queensland, ‘Iron Range, Cape York Pen., N. Qld 1–9.vi.1971, S. R. Monteith’ ( ANIC) ; 1 male (paratype), 9 km ENE of Mt.Tozer , 5–10.vii.1986, coll. Cardale ( ANIC) .

Re-description. Female.

Length. Body 1.5–1.6 mm, fore wing 1.7–1.8 mm, hind wing 1.1–1.2 mm.

Head. In dorsal view, 2.0 × as wide as long, 1.4 × as wide as mesoscutum, smooth, with temple rounded behind eyes. Eye in lateral view 1.7 × as high as wide and 1.3 × as wide as temple medially. POL 0.7 × OD; OOL 2.7 × OD. Face 1.6 × as wide as high, almost entirely smooth; inner margins of eyes subparallel. Clypeus 2.7 × 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, about as long as its maximum width; its middle tooth wide and rather short, partly directed below, lower tooth evenly curved on outside margin. Antenna with 20 antennomeres, 1.2 × as long as body. Scape 2.0 × as long as pedicel. First flagellomere 3.6 × as long as its maximum width, 0.9 × as long as second flagellomere. Second flagellomere 3.7 ×, third and fourth flagellomeres 3.0 ×, fifth to 16th flagellomeres 2.5–2.6 ×, 17th flagellomere 2.2 ×, and 18th flagellomere 3.0 × as long as their maximum width.

Mesosoma . In lateral view 1.2 × as long as high. Mesoscutum (dorsal view) 0.8 × as long as its maximum width, smooth. Notauli present only on vertical anterior surface of mesoscutum. Prescutellar depression (scutellar sulcus) smooth, only with median carina, 1.2 × as long as its maximum width. Precoxal sulcus wide, oblique, curved below, crenulate, reaching posterior margins of mesopleuron. Posterior mesopleural furrow crenulate below. Propodeum smooth, with complete median longitudinal carina. Propodeal spiracles very small, its diameter 0.2 × distance from spiracle to anterior margin of propodeum.

Wings. Length of fore wing 2.1 × its maximum width. Marginal cell ending on apex of wing, 3.8 × as long as its maximum width. Vein SR1 2.5 × as long as vein 3-SR. Vein r longer than pterostigma width. First subdiscal cell 2.1 × as long as its maximum width. Hind wing 6.0 × as long as maximum width.

Legs. Hind femur 3.8 × as long as its maximum width. Hind tibia distinctly widened to apex, 7.5 × as long as its maximum subapical width, 1.1 × as long as hind tarsus. First tarsomere of hind tarsus 2.0 × as long as second tarsomere.

Metasoma. First tergite weakly evenly widened towards apex, 2.1 × as long as its apical width, weakly striate. Ovipositor 1.2 × as long as first tergite, 0.5 × as long as metasoma, as long as hind femur.

Colour. Body, head, antennal segments, mandible and pterostigma brown to dark brown. Legs light brown. First metasomal tergite similar colour to second and third tergites. Wings almost hyaline.

Male. Body length 1.5 mm, fore wing 1.6 mm, hind wing 1.1 mm. Antenna with 21 antennomeres. First flagellomere 0.8 × as long as second flagellomere. Second flagellomere 4.3 × as long as width. Otherwise similar to female.

Comparative diagnosis. This species is similar to Orthostigma (Whartonstigma) longipede , sp. nov.; and differences between both species are described under the latter species and in the key below. On other hand, this species differs from Orthostigma (Whartonstigma) gallowagi ( Wharton, 2002) and Orthostigma (Whartonstigma) papuae , sp. nov. having the clypeus 2.7 × as wide as high (2.0 × in O. papuae ), eye in lateral view 1.3 × as wide as temple medially (3.0 × in O. gallowagi and 2.0 × in O. papuae ), first flagellomere 3.6 × as long as its maximum width (2.8 × in O. gallowagi and 3.0–3.2 × in O. papuae ), second flagellomere 3.7 × as long as its maximum width (2.4 × in O. gallowagi and O. papuae ), first metasomal tergite 2.1 × as long as its apical width (2.5–2.8 × in O. gallowagi ), hind femur 3.8 × as long as its maximum width (4.5 × in O. gallowagi ), and precoxal sulcus crenulated and reaching posterior margins of mesopleuron (not reaching in O. gallowagi and O. papuae ).

Distribution. Australia.

Figures

FIGURE 10. Orthostigma (Whartonstigma) tropicale Wharton, 2002 (A, C–F, holotype, female; B, paratype, male). A–B. Habitus, lateral view. C. Head and mesosoma, lateral view. D. Mandible. E. Antenna. F. Head, front view.

FIGURE 11. Orthostigma (Whartonstigma) tropicale Wharton, 2002 (holotype, female). A. Head and mesonotum, dorsal view. B. Propodeum. C. Legs, metasoma and ovipositor, lateral view. D. First metasomal tergite. E. Fore and hind wings.