Aptesis jinbensis, Watanabe, 2025

Aptesis jinbensis sp. nov.

[New SJN: Jinba-togari-himebachi]

( Figs. 12A–G, 78I)

Aptesis sp. B : Watanabe & Taniwaki, 2018: 75.

Type series. Holotype: JAPAN, KPM-NK 81207 , F, Honshu, Kanagawa Pref., Fujino Town, Mt. Jinba-yama , 7. VI. 2008, K. Watanabe leg.

Description. Female (n =1). Body punctate and polished; covered with setae; body length 6.8 mm.

Head 0.65 × as long as wide in dorsal view. Clypeus 2.4 × as wide as long; slightly convex in lateral view; sparsely punctate and coriaceous dorsally, smooth ventrally; lower margin subtruncate in frontal view, sharp and narrowly reflected in lateral view. Face 0.3 × as long as minimum width; weakly convex medially; punctate; ISP matt except for median part. Frons densely punctate with coriaceous ISP; with pair of weak, smooth concavities above antennal sockets. POL 1.5 × as OD. OOL 1.4 × as OD. Dorsal profile of gena rounded in dorsal view; width gradually narrowing posteriorly ( Fig. 12D). Occipital carina complete. Malar space 1.2 × as long as basal width of mandible. Mandible flat at base; lower tooth equal in length of upper tooth. Antenna with 23 flagellomeres; not flattened and tapped. FL I 1.7 × as long as maximum depth in lateral view, 1.0 × as long as FL II.

Mesosoma. Pronotum rugulose ventrally ( Fig. 12E). Epomia absent. Mesoscutum with short and weak notaulus; densely punctate. Scutellum slightly convex in lateral view. Mesopleuron without conspicuous smooth area around speculum; punctures partly united into foveola ( Fig. 12E). Epicnemial carina present laterally and ventrally. Sternaulus deep in anterior 0.6 of mesopleuron. Metapleuron rugose ventrally, with partly indistinct juxtacoxal carina. Propodeum rugose laterally and posteriorly; anterior transverse carina absent laterally, present medially; posterior transverse carina complete; lateromedian longitudinal carina present anteriorly, both carinae not parallel each other ( Fig. 12G); lateral longitudinal carina present and weak; pleural carina complete; area superomedia partly defined, ca. 1.2 × as long as maximum width; apophysis weak and obtuse ( Fig. 12G); spiracle oval. Fore wing length 5.1 mm. Areolet as long as maximum width; width steeply narrowing anteriorly; received vein 2m-cu at slightly beyond to middle ( Fig. 12F). Fore wing vein 1cu-a interstitial to vein M&RS ( Fig. 12F). Nervellus inclivous; intercepted near posterior end of vein ( Fig. 12F). Hind femur reticulate coriaceous; 4.1 × as long as maximum depth in lateral view. Tarsal claws simple.

Metasoma finely and sparsely punctate except for largely smooth in T I and T II; ISP smooth. T I 2.0 × as long as maximum width; latero-median carina weak basally absent apically; dorso-lateral carina complete. T II 0.7 × as long as maximum width. Thyridium present; close to anterior margin of T II; slightly depressed; ca. 2.0 × as wide as length. Ovipositor sheath 0.8 × as long as hind tibia, 1.2 × as long as T I. Ovipositor straight; apex sharp; apex of lower valve with teeth ( Fig. 78I).

Colouration ( Figs. 12A–G). Body (excluding wings) black to blackish-brown. Setae silver. Subapical part of mandible reddish-yellow. Basal segments of flagellum, fore and mid legs except for mid femur, hind coxa, hind trochanter, hind trochantellus, and membranous part of metasomal sternites yellow to yellowish-brown. FL V to FL X with white markings. Scape, pedicel, palpi, tegula, mid femur, hind leg except for coxa, trochanter, and trochantellus, T IV to T VIII brown. Apical part of flagellum more or less tinged with brown to reddish-brown (especially ventral surface). Apical part of T I, T II, and T III reddish-yellow. Posterior margins of T VII and T VIII narrowly whitish medially. Ovipositor reddish-brown. Wings hyaline. Veins and pterostigma blackish-brown except for yellowish-brown to yellow wing base.

Male. Unknown.

Distribution. Japan (Honshu).

Etymology. The specific name is from the type locality, Mt. Jinba-yama, Kanagawa Prefecture.

Bionomics. Unknown.

Remarks. This species resembles Ap. ezoensis sp. nov. and Ap. femoralis (Thomson, 1883) in body colouration but can be distinguished by the well-developed propodeal carinae (less developed in Ap. ezoensis ; see above key) and the hind femur and tibia darkened (not darkened in Ap. ezoensis and Ap. femoralis ), and the apical part of metasoma black to blackish-brown (red in Ap. femoralis ).