Helictes absulcus, Scanavachi & Penteado-Dias, 2025

Scanavachi, Júlia & Penteado-Dias, Angélica Maria, 2025, New species of Helictes Haliday 1837 (Hymenoptera, Ichneumonidae, Orthocentrinae) from Chile, Zootaxa 5665 (1), pp. 121-129 : 127-128

Helictes absulcus, Scanavachi & Penteado-Dias sp. nov.

Holotype ( Fig. 21–25 ): CHILE ( MNNC) ♀ ‘’ Osorno , Chile, Parque Nacional Puyehue’ ’ ‘’ S40°55 ’’ W 72° 1239’’ alt 987m; 16-30.III.2020; D. S. Amorim; Malaise trap; ( MNNC) . Paratypes: CHILE, 1 ♂; S 40°46’55 ’ W 72°12’39’’, 09-23.XII.2019; alt 987m, Malaise trap; S40°46’28’’ W 72°12’41’’ alt 1054m; 14.I-03.II.2017, Malaise trap ; 2 ♂; DCBU 387416 S 40°46’28’’ W 72°12’41’’ alt 1054m; 14.I-03.II.2017, D. Yeates; Malaise trap; DCBU 386782 S 40°46’28’’ W 72°12’41’’ alt 1054m; 14.I- 03.II 2017, D. Yeates; Malaise trap .

Diagnosis. This species can be identified by the absence of subocular sulcus and the short antenna.

Description of holotype. ♀ body length 3.8 mm; fore wing length 3.5mm hind wing length 2.6 mm

Head. Head coriaceous, face width 1.3 × height, malar space 1.5 × basal width of mandible, e with subocular sulcus absent or very weak, mandible twisted with two teeth visible, with lower tooth shorter than upper tooth. Inner eye orbits subparallel. Clypeus convex, apex width 0.6 × height, apical edge of clypeus truncate. Eye–ocellar distance 1.9 × diameter of lateral ocellus ( Fig. 22 ). Scape elongated 2.15 × longer than wide, 17 flagellomeres. Length of first flagellomere 3. × width, length of second flagellomere 0.17 × width.

Mesosoma. Pronotum coriaceous with epomia present. Mesopleuron polished and punctate, epicnemial carina and mesopleural fovea present, sternaulus distinct, short and shallow present only on anterior 0.3 of mesopleuron. Mesoscutum and scutellum coriaceous and densely pilose, notaulus deep, prescutellar groove with transversal carina. Scutellum with lateral carinae up to its apex ( Fig. 23 ). Propodeum coriaceous and pilose, with pleural carina, median longitudinal carinae and posterior transverse carina present, without costula. Propodeal apophyses absent ( Fig. 24 ).

Legs. Hind femur 3.5 × as long as wide. Hind tibia 7.3 × as long as wide, first segment of hind tarsus 0.3 × as long as second segment; dense hair fringe on apex of the hind tibia. Large claws and arolium.

Wings. Fore wing areolet absent. Two bullae on vein 2m-cu; Rs straight and extended to the end of the wing; nervous interstitial and broken. Hind wing intercepted by Cu1 below the middle.

Metasoma. Tergite 1 length 2.5 × apical width. The first and second tergites coriaceous, rest polished; glymma absent; ovipositor very short, 0.1 × the hind tibia. ( Fig. 25 ).

Color. Head black; clypeus brown, mandibles and palpi dark brown; pronotum, mesoscutum, scutellum and mesopleuron black, propodeum dark brown. Tegula brown. Legs mostly light brown, hind legs black, dorsal tibia and all tarsomeres light brown. Metasomal tergite 1 dark brown, tergites 2 and 3 brown with apex pale yellow, remaining brown. Sternites whitish with light brown spots, ovipositor sheaths pale yellow.

Male. Similar to females.

Etymology. The name refers to the absence of subocular sulcus.

Distribution. Osorno, Chile.

Figures

FIGURES 21–25. Helictes absulcus sp. nov. (21–25 holotype ♀). 21, habitus, lateral view. 22, head, anterior view. 23, mesossoma, lateral view. 24, propodeum, dorsal view. 25, metasoma, lateral view.