Pterostichus ( Cryobius ) badzhaliensis Sundukov, 2025

Pterostichus ( Cryobius) badzhaliensis Sundukov , sp. nov.

( Figs 11–15 View FIGURES 11–15 )

Type locality. RUSSIA, Khabarovsky Krai , Badzhal Ridge, source of the Omot-Makit River, 50.505559 N, 134.273428 E GoogleMaps .

Type material. Holotype, ♂ with labels: “ Khabarovsky Krai , Badzhal Ridge, source of the Omot-Makit River, 1800–2100 m, 7–19.VII.1997, leg. Yu. Sundukov (in Russian); “ HOLOTYPUS Pterostichus ( Cryobius) badzhaliensis sp. n. det. Yu. Sundukov 2025” [FEB]. Paratypes, 5♀, “ Khabarovsky Krai , Badzhal Ridge, source of the Omot-Makit River, 1800–2100 m, 7–19.VII.1997, leg. Yu. Sundukov (in Russian); “ PARATYPUS Pterostichus ( Cryobius) badzhaliensis sp. n. det. Yu. Sundukov 2025” [FEB] .

Description. Body slightly convex. Length 8.80–9.15 mm, width 2.90–3.10 mm.

Body black; antennae, palps, major of mandibles and labrum (entirely or on sides) brownish-red; legs entirely brownish-red or reddish-black.

Dorsal microsculpture of head very unclear isodiametric or indistinct; pronotum almost smooth, with areas of very weak transverse meshes over the entire surface; elytra with microsculpture from very narrow and long meshes.

Measurements: HW 1.40–1.55 (M 1.49); HL 1.10–1.13 (M 1.11); PA 1.38–1.50 (M 1.43); PW 2.13–2.28 (M 2.18); PB 1.40–1.58 (M 1.48); PLt 1.88–2.08 (M 1.98); PLm 1.58–1.98 (M 1.80); EW 2.90–3.10 (M 3.03); EL 4.63–4.90 (M 4.76); Ls 7.63–8.08 (M 7.85); L 8.80–9.15 (M 9.00).

Head small, convex, short (HW/HL 1.27–1.41; M 1.34). Eyes small, moderately convex or flattened. Temples rather long, slightly shorter or equal longitudinal diameter of eye. Frontal grooves short, deep, rather wide, parallel, starting from anterior supraorbital seta, indistinct on clypeus in holotype, distinct in paratypes. Frontoclypeal suture thin, distinct. Clypeus trapezoidal, with slightly concave or straight anterior margin; with one seta on each side. Labrum transverse, with 6 setae along anterior margin (inner four proximate). Mandibles rather large and wide, about as long as head from frontoclypeal suture to posterior margin of temple. Tooth of mentum short, about a third as long lateral lobes, concave at apex. Antennae rather thin, long, extended by 4.5–5 or 4 apical segments beyond the base of pronotum in male and female, respectively.

Pronotum elongate-cordate, rather large (PW/HW 1.37–1.55; M 1.46; EW/PW 1.36–1.42; M 1.39), slightly wider than long (PW/PLt 1.09–1.13; M 1.10), with maximum width before middle. Anterior margin very slightly concave, anterior angles slightly protruding, rounded at apex. Sides rather strongly or moderately convex, before posterior angles widely concave or long-rectilinear. Base narrow (PW/PB 1.38–1.54; M 1.48; PB/PA 1.00–1.11; M 1.04), almost rectilinear. Posterior angles acute, pointed at apex, drawn back and to the side. Disc moderately convex to narrow lateral margin, slightly flattened middle. Median line thin, distinct. Anterior transverse impression weak. Two basal foveae on each side, inner deep, slightly arcuate, striate at bottom, running on about basal 2/5, outer indistinct, completely fused to inner ones. Puncturation present only in basal foveae. Two setae on each side: anterior seta significantly in front of maximum width (1/5 distance from anterior to posterior angle) and posterior in posterior angle.

Elytra moderately convex, oblong-oval or weakly ovate, moderate long ( EL / EW 1.50 – 1.61 ; M 1.57; EL/PLt 2.34–2.48; M 2.41), with maximum width of 3/5 from base. Disc uniformly convex. Humeri strongly rounded, not protruding, with distinct tooth; basal ridge rectilinear. Striae complete, straight, moderately deep, impunctate. Intervals 1–6 weakly convex, outer ones flattened. Parascutellar striole absent. Parascutellar setigerous pores absent. Third interval with 3 small setigerous discal pores: anterior at 3rd stria, 2nd at 2nd stria, posterior at either 2nd or 3rd, but 4 setae present on left elytron in holotype and on right in one paratype. Umbilical seta series consisting of 10–13 setae: 6–7 in humeral group and 4–6 at apex. Preapical notches very weak. Apterous .

Legs long and slender. Middle and hind femora with 2 setae along posterior margin. Hind coxae with 3 setae. Trochanters with 1 seta. Metepisternum short: 1.2–1.3 times as long at outer margin than wide at anterior margin. Tarsomere 5 with thin ventral setae in apical half.

Pro-, meso-, metepisternum and mesoventrite/mesosternum rather densely punctate. Intercoxal process of prosternum not bordered, rounded at apex. Anal sternite of male with 2 setae at apex, in female—with 4 setae.

Aedeagus ( Figs 12–15 View FIGURES 11–15 ). Median lobe thick, short, slightly curved ventrally. Apical lamella very short, slightly curved to the right, broadly rounded at apex; its length about 4 times less than diameter of aedeagus in basal part.

Etymology. Toponymic, refers to the Badzhal Range, as the type locality of the new species.

Distribution. Known only from the type locality.

Habitat. The beetles live syntopically with P. kirilli sp. nov. in the alpine zone: on rocky watersheds and northern slopes, as well as among stones at streamheads.

Differential diagnosis. In our opinion, P. badzhaliensis sp. nov. is close to P. negligens , P. homalonotus , P. kaninensis and P. sojot , which are widespread in the mountains of Europe, Mongolia and South Siberia. Morphologically, the new species is closest to P. sojot khulugaicus Shilenkov, 2000 , described from the Tunkinskie Goltsy Mountains (Eastern Sayan), but the latter is characterized by the absence of humeral teeth, shorter antennae, and different median lobe structure. The closest geographically P. sojot suvorovi Shilenkov, 2000 (mountains of South Transbaikalia) differs from the new species in its completely reddish-brown legs, shorter antennae, and different median lobe structure. Of the Far Eastern species, P. badzhaliensis sp. nov. is most closely related to the arctic-boreal P. kaninensis kurnakovi Ball, 1966 . The latter differs from the new species by a smaller body (Ls = 6.1–6.4 vs. 7.6–8.1), shorter antennae (extending beyond the base of the pronotum by four apical segments in males and by three in females), mandibles (shorter than the head), the elytra with parascutellar setigerous pores, a longer and slender penis. From all other Far Eastern petrophilous Cryobius species, P. badzhaliensis sp. nov. differs by its long mandibles, short and robust median lobe, and by larger body.