Polysphincta cosnipata Padua & Saeaeksjaervi, 2021

Padua, Diego G., Saeaeksjaervi, Ilari E., Spasojevic, Tamara, Kaunisto, Kari M., Monteiro, Ricardo F. & Oliveira, Marcio L., 2021, A review of the spider-attacking Polysphincta dizardi species-group (Hymenoptera, Ichneumonidae, Pimplinae), with descriptions of seven new species from South America, ZooKeys 1041, pp. 137-165 : 137

Polysphincta cosnipata Padua & Saeaeksjaervi sp. nov. Fig. 2A-F

Diagnosis.

Polysphincta cosnipata sp. nov. can be distinguished from other species of the P. dizardi species-group by the combination of the following characters: (1) epomia absent (Fig. 2B ); (2) malar space 0.4 times as long as proximal mandibular width (Fig. 2B ); (3) fore wing vein 1 cu-a more or less interstitial relative to M&RS (Fig. 2A ); (4) mesosoma orange with metapleuron and propodeum brown (Fig. 2A ); (5) wings hyaline (Fig. 2A ); (6) hind leg whitish with inner part of coxa, trochanter proximally, trochantellus distally, femur proximally and distally, tibia proximally and distally, first tarsal segment distally, and remaining tarsal segments entirely blackish brown (Fig. 2A ); (7) metasoma brownish with anterior and anterolateral margins of tergites III-V whitish (Fig. 2A, C ); (8) ovipositor slightly slender, 1.2 times as long as hind tibia.

Description.

Female. Body [8.0] mm. Head. Clypeus weakly convex, posterior margin thin and flat centrally; malar space [0.4] times as long as proximal mandibular width; lower face [0.9] times as broad as high, weakly convex centrally, polished, with fine sparse setiferous punctures; head in dorsal view with margin of the gena weakly convex behind eyes and its margin about [0.5] times length of eye; ocelli moderately large, lateral ones separated from compound eyes by about [0.8] times their own maximum diameter. Mesosoma. Pronotum without epomia; shelf-like projection, in dorsal view, bilobed, subquadrangular, and in lateral view, slender, with anterolateral corners weakly decurved; mesoscutum more or less robust, in dorsal view, smooth and polished, with notauli weakly impressed anteriorly; scutellum convex, not laterally carinate; mesopleuron highly polished, virtually impunctate; epicnemial carina reaching almost to level of lower corner of pronotum; epicnemium with vestigial vertical carina near lower corner of pronotum; metapleuron convex, smooth and polished, with sparse, fine bristles evenly spaced, without discernible submetapleural carina. Propodeum mediodorsally smooth and polished, with longitudinal carinae present only posteriorly and with scattered fine bristles. Fore wing length about [7.0] mm; 1 cu-a more or less interstitial relative to M&RS; base of 1 m-cu&M separated from CU by about length of 2 cu-a; hind wing with distal abscissa of CU present and complete but weakly pigmented; first abscissa of RS subequal to rs-m. Tarsal claw with proximal lobe quadrangular, with claw apex slightly overtaking distal margin of lobe. Metasoma. Tergite I about [1.5] times as long as posteriorly broad, dorsally with lateromedian longitudinal carinae only discernible at extreme anterior part; sternite I with weak swelling near hind rim, and with weak median longitudinal ridge anteriorly; tergite II about [1.5] times as long as posteriorly broad, highly polished, at most with only fine setiferous punctures laterally; tergite III about [1.3] times as long as posteriorly broad, highly polished, at most with only fine setiferous punctures; subgenital plate subquadrate. Ovipositor slightly slender, [1.2] times as long as hind tibia, posteriorly evenly tapered to sharp point.

Color.

Head black except 0.8 of clypeus yellowish; antennae brownish with scape and pedicel ventrally whitish; mouthparts whitish, except apex of mandible brownish. Mesosoma orange with metapleuron and propodeum brown. Metasoma brownish with anterior and anterolateral margins of tergites III-V whitish. Fore leg orange, mid leg orange with coxa, trochanter and trochantellus whitish and tarsus distally brownish, hind leg whitish with coxa inner region, trochanter proximal, trochantellus distally, femur proximally and distally, tibia proximally and distally, first tarsal segment distally, and remaining tarsal segments entirely blackish brown. Wings hyaline, pterostigma brown. Ovipositor brown, with posterior and anterior parts whitish.

Male. Unknown.

Type material.

Holotype ♀. Peru, CU [= Cusco], Cosñipata valley, San Pedro, 13°03'23"S, 71°32'55"W, 1520 m, 12.XII.2007, Malaise trap (C. Castillo leg.), MUSM.

Distribution.

Peru (Fig. 11 ).

Biological note.

Host unknown.

Etymology.

The specific name (in apposition) refers to type locality of this species, Cosñipata valley, Cusco, Peru.

Remarks.

Polysphincta cosnipata sp. nov. closely resembles P. dizardi Gauld, 1991 and P. macroepomia sp. nov. mainly by coloration, with mesosoma orange and propodeum blackish or brownish. However, it differs from P. dizardi by having pronotum orange and metasomal tergites II-VI with anterior and anterolateral margins whitish (anterior part of pronotum brownish and metasomal tergites entirely darkish brown in P. dizardi ), and from P. macroepomia sp. nov. by having epomia absent (present in P. macroepomia sp. nov.).

Figures

Figure 2. Polysphincta cosnipata sp. nov., ♀, holotype A habitus, lateral view B head and pronotum, lateral view C habitus, dorsal view D face, anterior view E head, dorsal view F shelf-like projection, dorsal view.

Figure 11. Distribution of Polysphincta dizardi group in the Neotropical Region.