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

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

( Figs 119–123 View FIGURES 119–123 )

Type material. Holotype: CHINA (YUNNAN Prov.): ♂, two labels: “CHINA: Yunnan [ CH07-13 ], Baoshan / Pref., Gaoligong Shan, E pass, 36 km SE / Tengchong , 2200 m, 24º49’32’’N, / 98º46’06’’E, decid. forest, litter, wood, / fungi sifted, 31.V.2007, M. Schülke ” [white, printed]; “ CEPHENNODES (s. str.) / unus m. / P. Jałoszyński, 2025 / HOLOTYPUS ” [red, printed] ( MNB) GoogleMaps . Paratypes (2 exx.): 1 ♂, “CHINA: Yunnan, Baoshan Pref., Gao- / ligong Shan, 33 km SE / Tengchong, / 2150 m, 24º51’22’’N, 98º45’36’’E, / devast. primary deciduous forest, / litter, wood, mushrooms sifted, 28.VII. / 2009, leg. M. Schülke [ CH09-08 a]” [white, printed] (cPJ); 1 ♂, “CHINA: Yunnan [ CH07-11 ], / Baoshan Pref., Gaoligong Shan, / nr. Xiaoheishan N. R., 35 km SE / Tengchong, 2110 m, / 24º50’16’’N, 98º45’43’’E, decid. / forest, litter, sifted, 30.V.2007, / leg. A. Pütz ” [white, printed] (cAP). Each paratype with yellow “ PARATYPUS ” label GoogleMaps .

Diagnosis. Body small, BL around 1.2–1.3 mm; antennae gradually and strongly thickened; punctures on clypeus fine and inconspicuous, on frontovertexal region more distinct, small but sharply marked and dense, separated by spaces subequal to their diameters, punctures on pronotum and elytra fine and inconspicuous; subhumeral lines short, as long as 0.3 × EL. Male: lacking secondary sexual characters; aedeagus ( Figs 120–123 View FIGURES 119–123 ) in ventral view with strongly elongate and narrow apical region of capsular portion tapering distad, parameres not exceeding apex of median lobe.

Description. Body of male ( Fig. 119 View FIGURES 119–123 ) strongly convex, oval, with very shallow constriction between pronotum and elytra, light brown with slightly lighter tarsi, covered with yellowish brown setae. BL 1.21–1.28 mm.

Head broadest across moderately large and moderately strongly convex, coarsely faceted eyes, HL 0.15–0.16 mm, HW 0.29–0.30 mm; frontovertexal region weakly convex at middle; supraantennal tubercles weakly elevated. Punctures on clypeus fine and inconspicuous, those on frontovertexal region more distinct, small, sharply marked and dense, separated by spaces subequal to their diameters; setae short, sparse, suberect.Antennae long and slender, gradually and strongly thickened, AnL 0.58–0.60 mm, antennomere 1 about as long as broad, 2 weakly elongate, 3–7 each about as long as broad, 8–10 each transverse, 11 about as long as 9 and 10 combined, about 1.6 × as long as broad.

Pronotum semi-oval, moderately strongly convex at middle and flattened near hind corners, equally broad between base and middle; PL 0.35 mm, PW 0.53–0.58 mm. Anterior margin in strictly dorsal view nearly straight; lateral margins strongly rounded in anterior half and straight 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 much closer to posterior than to lateral pronotal margin. Punctures on pronotal disc fine and inconspicuous except for a few distinct small punctures near each hind corner. Setae on pronotal disc short and moderately dense, suberect.

Elytra slightly wider than pronotum, together oval, broadest near anterior third; EL 0.70–0.78 mm, EW 0.60– 0.63 mm, EI 1.17–1.24; 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 slightly closer to lateral margin of mesoscutellum than to subhumeral line; elytral apices separately rounded. Punctures on elytra fine and inconspicuous; setae similar to those on pronotum

In the three specimens studied, hind wings are functional in one, vestigial in the second, and completely obliterated in the third male.

Metaventrite with lateral impressions about as long as 3/4 of its length.

Legs long and slender, unmodified.

Aedeagus ( Figs 120–123 View FIGURES 119–123 ) of modified simonis form, AeL 0.20 mm; capsular region of median lobe in ventral view strongly elongate and subtriangular with strongly elongate and narrow distal portion tapering towards apex; dorsal apical projection (= distal plate) in ventral view with rounded left distolateral lobe and long, pointed right scythe-shaped process; parameres long and slender, not reaching apex of aedeagus, each with one long apical and two similarly long subapical setae.

Female. Unknown.

Distribution. S China: Yunnan.

Etymology. The Latin adjective unus means one, a single. Cephennodes unus is the only Chinese species that belongs in the C. oblongopunctatus group.

Remarks. Among the Nepalese species of this group, the main genital diagnostic character is the shape of the apical region of the capsular portion of the median lobe in ventral view. Within the Himalayan group, this apical region is commonly broadening distad, and in a few cases nearly parallel-sided with rounded or truncate distal margin. In contrast, C. unus has the apical region tapering distad. In C. falcipenis and C. oblongopunctatus ( Thailand), the apical region is either straight, parallel-sided and obliquely truncate, or curved mesad, respectively, none of the features occurring in C. unus . Unfortunately, the way the aedeagi of the Japanese species C. kotori and C. miharu have been illustrated makes it not possible to compare the newly described C. unus with these species. Cephennodes miharu was described with BL 1.35‒1.53 mm, and C. kotori 1.34‒1.50 mm, whereas C. unus is distinctly smaller, with BL 1.21‒1.28 mm.