Clistopyga subtenella Bordera & Palacio, 2025

Bordera, Santiago, Palacio, Edgard & Herrera-Flórez, Andrés Fabián, 2025, The Neotropical species of Clistopyga (Hymenoptera, Ichneumonidae, Pimplinae). Part VI: the C. calixtoi species group, with the description of twenty-four new species, Zootaxa 5662 (1), pp. 1-115 : 94-96

33. Clistopyga subtenella Bordera & Palacio , sp. nov.

( Figs 47 , 53 , Appendix I)

Diagnosis. Clistopyga subtenella may be distinguished from all other species of the C. calixtoi species group by the following combination of characters: genal orbit interrupted by dark brown or black ( Figs 47A, 47D ); mesosoma extensively orange ( Figs 47A, 47D–E ); pronotum mostly blackish brown and white cream ( Figs 47C–D ); propodeum laterally broadly yellow cream ( Fig. 47G ); hind femur white cream with subbasal and subdistal lateral brown marks ( Fig. 47A ); metasoma mostly dark brown, with posterior well defined white cream wide bands on tergites I–V ( Fig. 47A, 47F ); tergite I usually with lateral and posterior white cream marks ( Figs 47A, 47F ); head strongly narrowed behind eyes ( Fig. 47E ); epomia as a short oblique carina or tubercle at the bottom of the submarginal depression of pronotum ( Fig. 47C , arrow); metapleuron 2.85–2.95× as long as high ( Fig. 47G ); submetapleural carina weak, present at anterior 0.2–0.3 of metapleuron ( Figs 47D, 47G ); fore wing with vein 2 rs-m 0.5–0.55× as long as abscissa of M between 2 rs-m and 2 m-cu ( Fig. 47H ); hind wing with distal abscissa of Cu 1 slightly insinuated or absent ( Fig. 47I ); tergite II 1.25–1.43× as long as posteriorly broad, with very shallow setiferous punctures.

Description. Female: Body length 8.1–9.8 mm. Fore wing length 5.3–6.2 mm.

Head ( Figs 47A–B, 47D–E ). In dorsal view, strongly narrowed behind eyes. Gena shiny with very sparse setiferous punctures, in dorsal view slightly rounded, 0.25–0.28× as long as eye; in frontal view moderately constricted ventrally to eyes, slightly concave. Frons and vertex smooth and shiny, with very isolated setiferous punctures. Posterior ocellus separated from eye about 1.0-1.1× its maximum diameter. Distance between hind ocelli 0.83–0.88× maximum diameter of posterior ocellus. Hypostomal carina not lamelliform behind mandible. Face with shallow, fine and moderately sparse punctures, distance between them much more than its diameter. Clypeal suture moderately curved medially. Clypeus 1.85–2.0× as broad as medially long, weakly convex with very few punctures dorsally, flat and smooth ventrally, ventral margin straight centrally. Malar space about 0.8× as long as basal mandibular width, with a smooth and narrow subocular sulcus. Antenna with 27–31 flagellomeres, first flagellomere 6.0–6.6× as long as medially wide.

Mesosoma ( Figs 47A, 47C–E, 47G, 47H–I ). Pronotum smooth and shiny with very few setiferous punctures on posterior corner. Epomia as a short oblique carina or tubercle at the bottom of the submarginal depression of pronotum. Mesoscutum smooth and shiny, with sparse shallow and fine setiferous punctures, much denser on anterior part of median lobe; anterior half of median lobe not conspicuously prominent, confluent with posterior half. Notaulus weak, reaching about 0.5 the length of mesoscutum. Mesopleuron smooth and shiny, with very shallow and sparse small setiferous punctures on anterior and ventral part. Epicnemial carina weak, its dorsal end straight, ending at level of ventral third of pronotum. Metapleuron smooth and shiny, glabrous, 2.85–2.95× as long as high. Submetapleural carina weak, present at anterior 0.2–0.3 of metapleuron. Propodeum smooth and shiny with very sparse and isolated fine setiferous punctures, in dorsal view about 1.4× as long as medially wide. Propodeal spiracle 0.15–0.18 the length to anterior end of pleural carina. Hind leg with femur 3.35–3.5× as long as high, about 1.0–1.1× as long as tibia. Fore wing with vein cu-a opposite to Rs & M; vein 2 rs-m 0.5–0.55× as long as abscissa of M between 2 rs-m and 2 m-cu: abscissa of Cu 1 between 1 m-cu and Cu 1 a 1.57–1.75× as long as Cu 1 b. Hind wing with vein cu-a 0.40–0.41 × as long as abscissa of Cu 1 between M and cu-a; vein cu-a reclivous, first abscissa of Cu 1 vertical; distal abscissa of Cu 1 slightly insinuated to absent.

Metasoma ( Figs 47A, 47F, 47J ). Tergite I about 1.67× as long as posteriorly broad, shiny, with very sparse shallow setiferous punctures laterally and posteriorly, spiracle near its anterior 0.35; lateromedian longitudinal carinae strong at anterior 0.2 of tergite; lateral longitudinal carinae absent. Sternite I extending posteriorly 0.5–0.55 the length of tergite. Tergite II 1.25–1.43× as long as posteriorly broad, with very shallow and moderately sparse setiferous punctures, distance between punctures more than its diameter; punctation of posterior tergites tending to be denser. Ovipositor stout, evenly up-curved at posterior 0.3, 2.25–2.3× as long as hind tibia. Ovipositor sheath 1.85–1.9× as long as hind tibia, ventral margin basally without denticles, length of setae on average 2.4–2.5× the sheath basal width.

Colouration ( Fig. 47 ). Head mostly white cream, with apex of mandibles, frons and vertex medially, middle part of genal orbit, middle and dorsal posterior part of gena and occipital region, dark brown to black; face with a light brown middle spot; antenna brown, scapus, pedicel, annellus and first to fourth flagellomeres, laterally white cream. Mesosoma mostly orange; propleuron dorsally, mid lateral part of pronotum, ventral part of metapleuron, metasternum and most part of propodeum dark brown to black; propleuron ventrally, ventral and dorsal lateral wide bands on pronotum, tegula, subalar prominence, some markings or shadings on the medial anterior part of mesopleuron, mesepisternum, scutellum dorsally and posteriorly, postscutellum, posterior part of metapleuron and widely lateral parts of propodeum, white cream. Metasoma mostly dark brown; tergites I–V antero laterally, and posteriorly widely banded, white cream, tergites II–III with lateral posterior black spots; ovipositor dark brown; ovipositor sheaths black. Legs predominantly white cream; front leg with dorsal stripe on femur, tibia and distal part of tarsi, brown; mid leg with base of trochanter, dorsal stripe on femur and tibia and distal part of tarsi brown; hind leg with lateral spots on coxa, base of trochanter, distal part of trochantelli, base and lateral subdistal marks on femur, basal and distal part of tibia, and distal part of tarsi, brown. Wings hyaline, pterostigma blackish brown.

Male: Unknown.

Etymology. The specific epithet, subtenella , derives from the Latin “ tenellus ” (delicate, subtle) to which the prefix “ sub -” (a little, almost, nearly) is added, and it refers to the rather delicate or slender habit of this new species.

Type material (5 ♀♀). Holotype. Brazil: 1 ♀, Caruaru , IV. 1972, 900m M. Alvarenga ( EMUS) . Paratypes. Brazil: 1 ♀, Encruzilhada , Bahia, XI. 1974, 980m, M. Alvarenga ( EMUS) ; 1 ♀, Caruaru , VII. 1972, 900m J. Lima ( EMUS) ; 1 ♀, Caruaru , V. 1972, 900 m, J. Lima ( NHMUK) ; 1 ♀, Fragment Pasto novo, Brésil, Brésil malaise 2, 10-1.X.2001 ( MNHN) .

Distribution. Brazil ( Fig. 53 , Appendix I).

Figures

FIGURE 47. Clistopyga subtenella sp. nov., female (holotype):(A) habitus (lateral view); (B) head (frontal view); (C) pronotum (lateral view; epomia, arrow); (D) head and mesosoma (lateral view); (E) head and mesosoma (dorsal view); (F) tergites I-IV (dorsal view); (G) metapleuron and propodeum (lateral view); (H) fore wing; (I) hind wing; (J) ovipositor (lateral view). Scale bar: 1 mm (A, F); 0.5 mm (D, E, J); 0.3 mm (G, H, I); 0.2 mm (B); 0.1 mm (C).

FIGURE 53. Geographic distribution of C. calixtoi species group: C. angustipleura sp. nov., C. jakobii Graf, C. kogabae sp. nov., C. laplatense sp. nov., C. magninsula Higa & Penteado-Dias, C. subtenella sp. nov.