Bylesia brachyscleromamorpha, Reshchikov, 2025

Reshchikov, Alexey, 2025, Bylesia gen. nov., a new genus of Darwin wasp (Hymenoptera: Ichneumonidae) from the Eastern Himalaya, Acta Entomologica Musei Nationalis Pragae 65 (1), pp. 71-79 : 74-75

publication ID	https://doi.org/10.37520/aemnp.2025.006
persistent identifier	https://treatment.plazi.org/id/03A63B1F-A01E-4C58-C893-E845FA37E72F
treatment provided by	Felipe
scientific name	Bylesia brachyscleromamorpha
status	sp. nov.

Treatment

Bylesia brachyscleromamorpha sp. nov.

( Figs 1–3 View Fig View Fig View Fig )

Type material examined. HOLOTYPE: ♀ ( XTBG586 ), ‘ CHINA: Yunnan, Lijiang, Jade Dragon Snow Mountain , 27.167°N 100.227°E, 3365 m a.s.l.; 12-22.viii.2012, QCAS 3400m site4, Malaise trap, Sample 1842,Akihiro Nakamura et al. leg. ( ISAS). GoogleMaps

Description. Female ( Figs 1–3 View Fig View Fig View Fig ) main features indicated in description of genus. Body length approximately 15.0 mm, forewing length 11.7 mm. Main background colour black and reddish-yellow ( Fig. 1A View Fig ).

Head short, its width 3.6× its length, temples about 0.5× transverse width of eye, sparsely setose, abruptly narrowed behind eyes ( Fig. 2B View Fig ). Antenna short, 0.7× length of fore wing, with flagellum finely setose, with 34 flagellomeres, basal flagellomere transverse, oblique apically, median flagellomeres almost as long as broad, subapical transverse ( Fig. 1A View Fig ). Face 2.2× times as wide as high, coarsely reticulated, sparsely setose, with distinctly raised curved carina on edge of epistoma, edge of antennal socket raised and produced as carina between antennal socket and inner margin of eye that curves downwards ( Fig. 2A View Fig ). Clypeus almond-shaped, sparsely punctate with rough punctures dorsally, and impunctate ventrally. Mandible distinctly punctate, upper tooth slightly shorter than lower tooth ( Fig. 2A View Fig ). Malar space 0.8× times basal width of mandible. POL = 1.6 times of Od, OOL = 2.8 times of Od.

Mesosoma coarsely and sparsely punctate with rough punctures, setose ( Figs 2C, D View Fig ). Pronotum striate and sparsely punctate with rough punctures ( Fig. 2C View Fig ). Scutum roughly punctate, flat ( Fig. 2D View Fig ). Scutellum roughly punctate, flat, heavily setose ( Fig. 2D View Fig ). Speculum large, impunctate, shiny, slightly striate anterodorsally ( Fig. 2C View Fig ). Metapleuron with finer punctures. Legs stout, compressed, hind femur 4.3× as long as wide in its middle. Tarsal claws pectinate with high teeth slightly inclined medially ( Fig. 3E View Fig ). Propodeum short, heavily setose, area superomedia transverse, area petiolaris elongate ( Fig. 2H View Fig ). Propodeal spiracle elongate, 2× as long as wide, slightly closer to pleural carina than to lateral carina, connected to latter by ridge. Lateral longitudinal and posterior transverse carina forming small tooth where they meet. Area petiolaris longer than area superomedia, latter pentagonal, area basalis absent. Fore wing with pterostigma elongate, 3.6× as long as broad ( Fig. 3A View Fig ). Distal abscissa of M complete to wing margin, between rs-m and 2m-cu longer than rs-m. Hind wing with distal abscissae of Rs, M, Cu1 and 1A distinct, Cu&cu-a is sharply broken ( Fig. 3A View Fig ). Wing membrane with dense short setae ( Fig. 3A View Fig ). Fore wing with cu-a postfurcal. Vein 2m-cu with single bulla.

Metasoma setose ( Fig. 1A View Fig ). T1–2 finely and sparsely punctate, T3–6 without punctures. T1 2.4× as long as apically broad ( Fig. 2F View Fig ). T1 with lateromedian carina defined, reaching spiracle, ventral carina distinct, with slight striation behind glymma ( Fig. 2F View Fig ). Ovipositor 1.8× as long as hind tibia ( Fig. 1A View Fig ).

Coloration ( Figs 1A View Fig , 2 View Fig , 3 View Fig ). Body black, following structures yellow: face, scape and pedicel, basal part of clypeus, malar space, pronotum dorsally, inner part of fore femur, fore tibia and tarsus, distal part of middle femur, middle tibia, proximal parts of middle tarsomeres 1–3, distal tip of hind femur, hind tibia except for its distal tip, tegula, auxillar sclerite, proximal part of T1, most of membranous part of S1, distal part of S2–3; following structures yellow-white: distal part of fore coxa and fore trochanter completely, middle coxa and trochanter; following structures reddish-yellow: hind femur except for its distal part, most of T1 except for its proximal part, T2–3 and T4 basally. Wing membrane infumate except proximally ( Figs 1A View Fig , 3A View Fig ).

Male. Unknown.

Etymology. The specific name is feminine adjective, derived from Darwin wasp genus name Brachyscleroma

Cushman, 1940 of the subfamily Sisyrostolinae Seyrig, 1932 , whose habitus resembles the described species, and the Greek morpha (μορφή, appearance).

Biology. Unknown.

Ecological note. Adult wasp was sampled at 3,365 m elevation on the Jade Dragon Snow Mountain (īffiNJƜ), in conifer forest with dominant tree species Abies georgei , understory with Quercus pannosa , and Rhododendron siderophyllum .

Distribution. CurrentlyknownonlyfromNWYunnan ( China).