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

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

( Figs 45–47 View FIGURES 45–47 )

Type material. Holotype: CHINA (YUNNAN Prov.): ♂, two labels: “CHINA: Yunnan, Lincang Pref., Xue / Shan , 11 km ENE Lincang, 2510 m, / 23º55’01’’N, / 100º11’17.5’’E, second. / pine forest with Rhodod., small cleft with / water, litter & mushrooms sifted, / 10.IX.2009, / leg. M. Schülke [ CH09-39 ]” [white, printed]; “ CEPHENNODES (s. str.) / xueshanus m. / P. Jałoszyński, 2025 / HOLOTYPUS ” [red, printed] ( MNB). GoogleMaps

Diagnosis. Body moderately large, slightly over 1.5 mm in length; antennae gradually thickened; punctures on head small but dense, slightly more distinct than those on pronotum, punctures on pronotum small but sharply marked and more distinct than those on elytra; pronotal lateral carinae single; subhumeral lines short, as long as 0.25 × EL. Male: antennomere 7 not enlarged; aedeagus ( Figs 46–47 View FIGURES 45–47 ) with capsular region of median lobe in ventral view distally deeply divided by a long notch into lateral subtriangular elongate halves; parameral apices unmodified.

Description. Body of male ( Fig. 45 View FIGURES 45–47 ) strongly convex, oval, with shallow but distinct constriction between pronotum and elytra, moderately dark brown with slightly lighter tarsi, covered with light brown setae. BL 1.53 mm.

Head broadest across moderately large and moderately strongly convex, coarsely faceted eyes, HL 0.23 mm, HW 0.36 mm; frontovertexal region weakly convex at middle, unmodified; supraantennal tubercles weakly elevated. Punctures on frontovertexal area small and shallow but distinct and dense, separated by spaces subequal to their diameters; setae sparse, short and suberect. Antennae moderately long and slender, gradually thickened, AnL 0.78 mm, antennomere 1 about as long as broad, 2 distinctly elongate, 3–6 each about as long as broad, 7 weakly elongate and about as broad as 8, 8 weakly transverse, 9 and 10 each about as long as broad, 11 as long as 9 and 10 combined, slightly more twice as long as broad.

Pronotum semi-oval, strongly convex at middle and weakly flattened near hind corners, broadest slightly anterior to middle but weakly narrowing posterad; PL 0.48 mm, PW 0.68 mm. Anterior margin in strictly dorsal view nearly straight; lateral margins strongly rounded in anterior half and nearly straight posteriorly, microserration extremely fine and barely discernible; posterior corners nearly right-angled; posterior margin shallowly bisinuate; lateral marginal carinae simple (i.e., not doubled); lateral antebasal pits shallow but distinct, each similarly distant from posterior and lateral pronotal margin. Punctures on pronotal disc similar to those on head but slightly less distinct; setae short and moderately dense, weakly suberect.

Elytra slightly broader than pronotum, together oval, broadest near anterior third; EL 0.83 mm, EW 0.73 mm, EI 1.14; subhumeral lines carinate but blunt, as long as 0.25 × 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 unmodified, separately rounded. Punctures on elytra fine, unremarkable; setae similar to those on pronotum.

Hind wings functional.

Metaventrite with short and shallow lateral impressions occupying only its anterior 1/4.

Legs long and slender, unmodified.

Aedeagus ( Figs 46–47 View FIGURES 45–47 ) of modified latus form, AeL 0.45 mm; capsular region in ventral view oval, lacking distolateral lobes, but distally deeply divided by a long notch into lateral subtriangular halves; apical projections forming two asymmetrical groups, in ventral view distal (dorsal) plate with narrow and nearly straight subtriangular apical region, in lateral view distal plate weakly curved; parameres long and moderately thick, with unmodified apices, each paramere with two similarly long apical setae.

Female. Unknown.

Distribution. S China: Yunnan.

Etymology. The adjective xueshanus refers to Lincang Daxueshan (= Hunhua) Mountains.

Remarks. Cephennodes xueshanus is externally unremarkable and, because males do not have any secondary sexual characters, only its genital features classify this species as a member of the C. excavatus group. The aedeagus is unique and allows for unambiguous identification. No other species has the capsular region of the median lobe deeply cleaved distally, in ventral view divided by a long notch into lateral subtriangular lobes.