Stethantyx rufispa Khalaim & Bordera

Khalaim, Andrey I., Sääksjärvi, Ilari E. & Bordera, Santiago, 2015, Tersilochinae of Western Amazonia (Hymenoptera: Ichneumonidae). Genus Stethantyx Townes, part 2, Zootaxa 3981 (1), pp. 95-106 : 101-102

Stethantyx rufispa Khalaim & Bordera , sp. nov.

( Figs 3, 5 , 16–18 )

Description. Female. Body length 4.3 mm. Fore wing length 3.1 mm.

Head strongly rounded behind eyes in dorsal view; temple almost 0.6× as long as eye width. Mandible with upper tooth very long, almost 2.5× longer than lower tooth. Clypeus 2.7× as broad as long, lenticular, separated from face by weak but distinct furrow, slightly convex in lateral view, with lower margin slightly truncated, smooth, sparsely punctate in upper part. Malar space as long as basal width of mandible. Antennal flagellum ( Fig. 16 ) narrowed towards apex, with 17–20 flagellomeres (20 flagellomeres in holotype); all flagellomeres (except basal and subapical ones) 1.3–1.5× as long as broad. Face and frons punctate, smooth between punctures; face with very weak prominence centrally. Vertex and temple smooth and shining, with very fine (mostly indistinct on temple) punctures. Occipital carina complete.

Notaulus as strong wrinkle, with depression posteriorly behind wrinkle. Mesoscutum and scutellum smooth and shining, with fine and moderately dense punctures. Scutellum with lateral longitudinal carinae developed in its anterior half. Foveate groove situated in anterior half of mesopleuron, very strongly oblique, deep and broad, with transverse wrinkles, not reaching prepectal carina anteriorly. Mesopleuron punctate on smooth and shining background, with impunctate area anteriorly (above foveate groove). Dorsolateral area of propodeum finely and sparsely punctate on smooth background; apical area coriaceous. All propodeal carinae complete and well developed, without adjacent wrinkles ( Fig. 17 ). Basal area of propodeum rectangular, almost twice as long as broad and about 0.4× as long as apical area ( Fig. 17 ). Propodeal spiracle separated from pleural carina by one diameter of spiracle. Apical area flat, rounded or slightly truncate anteriorly ( Fig. 17 ).

Fore wing ( Fig. 5 ) with first and second abscissae of radius meeting at right angle (second abscissa curved). Intercubitus slightly thickened, shorter than abscissa of cubitus between intercubitus and second recurrent vein. Metacarpus almost reaching apex of fore wing. Hind wing with nervellus vertical. Legs slender. Hind femur 4.5× as long as broad and 0.9× as long as tibia.

First tergite slender, 3.5× as long as posteriorly broad, smooth, petiole partly striate laterally before glymma. Glymma situated slightly behind middle of tergite, weak, joining by fine furrow to ventral part of postpetiole. Second tergite 1.0–1.1× as long as anteriorly broad ( Fig. 18 ). Thyridial depression about twice as long as broad. Ovipositor upcurved, with very weak dorsal subapical depression; sheath 2.4–2.8× (2.4× in holotype) as long as first tergite and about 2.7× as long as hind tibia.

Head, mesosoma and metasoma yellowish orange; palpi, mandible (teeth dark red), clypeus, lower part of face and petiole of first metasomal segment yellow. Antenna with scape yellow, pedicel brown and flagellum black. Pterostigma brown. Legs yellow, in holotype hind tarsus black.

Male. Unknown.

Etymology. Species name is based on combination of initial letters of Russia, Finland and Spain, home countries of the participants of this paper.

Material examined. Holotype female ( MEKRB, currently on loan in CEUA) Peru, Junín Reg., near La Merced, Fundo La Genova, 20.XII.2008 – 3.I.2009.

Paratypes. Ecuador, Orellana : 1 ♀ & 1 ♂ ( ZISP) Onkone Gare, 0º39′25.7′′ S, 76º27′10.8′′ W, 216.3 m, canopy fogging, 6–8.X.1995, coll. T.L. Erwin et al.

Distribution. Ecuador ( Orellana ), Peru (Junín).

Comparison. This species is very similar to S. radiata sp. nov. as both have right-angled radial cell, long malar space, strong notaulus, rectangular basal area of propodeum, extensively punctate on smooth background head and mesosoma, and predominantly yellowish orange body, but S. rufispa sp. nov. differs by the shorter flagellomeres of antenna ( Fig. 16 ), shorter second tergite ( Fig. 18 ) and longer ovipositor ( Fig. 3 ).

Figures

FIGURES 3 – 6. Stethantyx rufispa sp. nov., ♀, holotype: 3 — habitus, lateral; 5 — wings. Stethantyx undulata sp. nov., ♀, holotype (4) and paratype (6): 4 — habitus, lateral; 6 — wings.

FIGURES 16 – 18. Stethantyx rufispa sp. nov., ♀, holotype: 16 — antennae, lateral; 17 — propodeum, dorsal; 18 — metasomal tergites 1 and 2, dorsal.