Orthostigma (Whartonstigma) longipede Peris-Felipo, 2020

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 : 415-417

Orthostigma (Whartonstigma) longipede Peris-Felipo , sp. nov.

( Figs 6 , 7 )

Type material. Holotype: female, Papua New Guinea, Mt Wilhelm , UTM (-5.731961, 145.2522), 700 m, 19– 20.x.2013, understorey, Coll. by Sam et al., site: MW0700-03, P4739; vial: 20848, MAL-MW0700’C-07/16-d07 ( MNHM).

Paratypes: 1 female, same data as holotype, but MW0700-04, P4755; vial: 20855, MAL-MW0700’D-07/16- d07 ( MNHM) ; 1 female, same data as holotype, but 8–9.xi.2012, Plot 2, understorey, leg. Keltim, Uma, Novotny, Leponce; Malaise—MAL-MW0700’B-15/16-d15 ( PFEC) .

Description. Female (holotype).

Length. Body 1.9 mm, fore wing 1.9 mm, hind wing 1.3 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 1.5 × as high as wide and 2.0 × as wide as temple medially. POL 1.1 × OD; OOL 2.7 × OD. Face 1.4 × as wide as high, entirely smooth; inner margins of eyes subparallel. Clypeus 2.6 × as wide as high, slightly concave ventrally. Paraclypeal fovea small, reaching half distance between clypeus and inner border of eye. Mandible almost parallel-sided, 1.1 × as long as maximum width; its middle tooth narrow and rather short, directed forwards, lower tooth evenly curved on outside margin. Antenna with 20 antennomeres, 1.1 × as long as body. Scape 2.0 × as long as pedicel. First flagellomere 3.8 × as long as its maximum width, 0.9 × as long as second flagellomere. Second flagellomere 3.9 ×, third flagellomere 3.0 ×, fourth to 12th flagellomeres 2.5–2.7 ×, 13th to 17th flagellomeres 2.2–2.3 ×, and 18th (apical) flagellomere 2.8 × 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, with median carinae, 1.2 × 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 2.5 × its maximum width. Marginal cell ending on apex of wing, 4.3 × as long as its maximum width. Vein SR1 2.8 × as long as vein 3-SR. First subdiscal cell 3.0 × as long as its maximum width. Hind wing 6.8 × as long as its maximum width.

Legs. Hind femur 3.8 × as long as its maximum width. Hind tibia weakly widened to apex, 6.5 × as long as its maximum subapical width, about as long as hind tarsus. First tarsomere of hind tarsus 1.8 × as long as second tarsomere.

Metasoma. First tergite weakly evenly widened towards apex, 2.2 × as long as its apical width, weakly striate. Ovipositor 1.6 × as long as first tergite, 0.6 × as long as metasoma, 1.3 × as long as hind femur.

Colour. Body, mandible, flagellomeres of antenna, pterostigma, and legs dark brown to black. Fore and middle tarsus light brown. First metasomal tergite similar colour to second and third tergites. Wings almost hyaline.

Variation. Body length 1.9–2.0 mm Antenna 19–20 antennomeres. Otherwise similar to holotype.

Male. Unknown.

Etymology. The name is related to the long size of the legs.

Comparative diagnosis. The new species is similar to Australian Orthostigma (Whartonstigma) tropicale Wharton , but differs from it in having the eye in lateral view 2.0 × as wide as temple medially (1.3 × in O. tropicale ), precoxal sulcus almost smooth and not reaching posterior margin of mesopleuron (crenulate and reaching posterior margin of mesopleuron in O. tropicale ), first subdiscal cell of fore wing 3.0 × as long as its maximum width (2.1 × in O. tropicale ), hind tibia 6.5 × as long its maximum subapical width (7.5 × in O. tropicale ).

Distribution. Papua New Guinea.

Figures

FIGURE 6. Orthostigma (Whartonstigma) longipede Peris-Felipo, sp. nov. (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 7. Orthostigma (Whartonstigma) longipede Peris-Felipo, sp. nov. (holotype, female). A. Propodeum. B. Legs, metasoma and ovipositor, lateral view. C. First metasomal tergite. D. Fore and hind wings.