Cephennodes (s. str.) transversicarinatus, Jałoszyński, 2025

Cephennodes (s. str.) transversicarinatus sp. nov.

( Figs 81–84 View FIGURES 81–88 )

Type material. Holotype: CHINA (YUNNAN Prov.): ♂, two labels: “CHINA [21] - Yunnan, / Pingbian , broad- / leaved for., 23º00’39’’N, / 103º42’10’’E, 1500 m / 26.VIII.2014, V. Assing” [white, printed]; “ CEPHENNODES (s. str.) / transversicarinatus m. / P. Jałoszyński, 2025 / HOLOTYPUS ” [red, printed] ( MNHW) GoogleMaps . Paratypes (22 exx.): 5 ♂♂, 3 ♀♀, same data as for holotype; 7 ♂♂, 7 ♀♀, “CHINA: Yunnan, NNE Pingbian, / 23º00’39’’N, 103º42’10’’E, 1500 / m, subtropical broad-leaved forest, / litter sifted, 26.VIII.2014, / leg. M. Schülke [ CH14-21 ]” [white, printed]. Each paratype with yellow “ PARATYPUS ” label ( MNB, MNHW, cPJ) GoogleMaps .

Diagnosis. Body moderately large, BL around 1.5 mm; antennae gradually thickened; punctures on head, pronotum and elytra small but distinct and dense, those on clypeus and frontovertexal region denser than those on remaining body parts; pronotal lateral carinae single; subhumeral lines short, as long as 0.3 × EL. Male: head modified ( Fig. 82 View FIGURES 81–88 ), clypeus demarcated from frontal region by weakly arcuate (anteriorly convex) transverse carina; scape with dorsal longitudinal ridge demarcating mesal flat surface expanding mesad; aedeagus ( Figs 83– 84 View FIGURES 81–88 ) conspicuously elongate, in ventral view with distal margin of capsular region nearly symmetrical and broadly rounded, distal plate elongate and strongly curved dorsad; aedeagus with elongate endophallic structure bearing lateral denticles on its distal head-like portion.

Description. Body of male ( Fig. 81 View FIGURES 81–88 ) strongly convex, oval, with shallow constriction between pronotum and elytra, dark brown with slightly lighter tarsi, covered with light brown setae. BL 1.45–1.53 mm.

Head ( Fig. 82 View FIGURES 81–88 ) broadest across moderately large and moderately strongly convex, coarsely faceted eyes, HL 0.20–0.21 mm, HW 0.35–0.38 mm; clypeus strongly convex, so that in posterodorsal view appears as short subtrapezoidal convexity ( Fig. 81 View FIGURES 81–88 ); frontovertexal region weakly convex, demarcated from clypeus by arcuate transverse carina; supraantennal tubercles weakly elevated. Punctures on clypeus and frontovertexal region small but sharply marked and dense, separated by spaces subequal to their diameters; setae sparse, long and suberect. Antennae long and slender, gradually thickened, AnL 0.73–0.80 mm, antennomere 1 modified, wider than long, with dorsal longitudinal ridge demarcating subrectangular mesal flat surface expanding mesad over lateral margins of clypeus and mandibular base, 2 weakly elongate, 3–6 each about as long as broad, 7 weakly to distinctly elongate, 8 weakly transverse, 9 and 10 each about as long as broad, 11 nearly as long as 9 and 10 combined, about twice as long as broad.

Pronotum semi-oval, moderately strongly convex at middle and flattened near hind corners, broadest near middle and barely discernibly narrowing posterad or equally broad between base and middle; PL 0.45–0.50 mm, PW 0.68–0.73 mm. Anterior margin in strictly dorsal view nearly straight; lateral margins strongly rounded in anterior half and nearly straight or weakly rounded posteriorly, finely microserrate, posterior corners nearly right-angled; posterior margin shallowly bisinuate; lateral marginal carinae simple (i.e., not doubled); lateral antebasal pits shallow but distinct, each located distinctly closer to posterior than to lateral pronotal margin. Punctures on median region of pronotal disc small but sharply marked, separated by spaces subequal to their diameters; punctures near anterior angles denser and somewhat coarse. Setae on pronotal disc long and moderately dense, suberect.

Elytra about as wide as pronotum, together oval, broadest near anterior third; EL 0.78–0.88 mm, EW 0.70–0.75 mm, EI 1.07–1.21; subhumeral lines developed as sharp borders between elevated humerus and lower mesal region, as long as about 0.3 × EL and distinctly divergent posterad; basal elytral fovea on each elytron located slightly closer to lateral margin of mesoscutellum than to subhumeral line; elytral apices separately rounded. Punctures on elytra distinctly shallower than those on pronotum but distinct and similarly dense; setae distinctly longer than those on pronotum, dense and erect.

Hind wings functional.

Metaventrite with diffuse lateral impressions about as long as half of its length.

Legs long and slender, unmodified.

Aedeagus ( Figs 83–84 View FIGURES 81–88 ) of strongly modified simonis form, AeL 0.60 mm; capsular region of median lobe in ventral view extremely elongate, with distal margin nearly symmetrical and weakly rounded; dorsal apical projection (= distal plate) in ventral view slender, elongate and tapering distad, in lateral view hook-shaped, curved dorsad at nearly right angle; endophallus with elongate structure bearing lateral denticles on its distal head-like portion; parameres long and slender, not reaching apex of aedeagus, each with one long apical and two similarly long subapical setae.

Female. Externally similar to male, except for unmodified head; wingless; BL 1.43–1.53 mm; HL 0.20–0.23 mm, HW 0.34–0.38 mm, AnL 0.70–0.73 mm; PL 0.45–0.50 mm, PW 0.68–0.70 mm; EL 0.75–0.85 mm, EW 0.70–0.75 mm, EI 1.03–1.14.

Distribution. S China: Yunnan.

Etymology. The adjective transversicarinatus refers to the transverse frontal carina on the head in males.

Remarks. The unique head and scape modifications in male, and the endophallic structure with a denticulate head-like distal portion are unique features and allow for unambiguous identification of C. transversicarinatus .