Cephennodes (Fusionodes) linguatus, Jałoszyński, 2025

Cephennodes (Fusionodes) linguatus sp. nov.

( Figs 214–217 View FIGURES214–221 )

Type material. Holotype: CHINA (YUNNAN Prov.): ♂, two labels: “CHINA: Yunnan [ CH07-19 ], Dehong Dai / Aut. Pref., mountain range 31 km E Luxi, / 2280 m, 24º29’31’’N, 98º52’58’’E, / second. pine forest with old decid. trees, / litter sifted, 3.VI.2007, M. Schülke ” [white, printed]; “ CEPHENNODES / ( FUSIONODES ) / linguatus m. / P. Jałoszyński, 2025 / HOLOTYPUS ” [red, printed] ( MNB) GoogleMaps . Paratypes (4 exx.): 2 ♂♂, 2 ♀♀, same data as for holotype, each with yellow GoogleMaps PARATYPUS label ( MNB, cPJ) .

Diagnosis. Body moderately large, BL around 1.5 mm; antennae gradually thickened; punctures on median region of clypeus virtually absent, few distinct punctures present on lateral regions of clypeus, punctures on median area of frontovertexal region small but distinct, sharply marked and separated by spaces subequal to their diameters, those on lateral areas of frontovertexal region distinctly denser, separated by spaces slightly shorter than their diameters, punctures on median region of pronotal disc slightly smaller than on head but distinct and separated by spaces subequal to their diameters, those on elytra fine and inconspicuous; subhumeral lines short, as long as 0.3 × EL. Male: aedeagus ( Figs 215–217 View FIGURES214–221 ) in ventral view with capsular region of median lobe with shallowly bisinuate distal margin, and its distal margin in lateral view rounded, lacking emargination or indentation; subapical dorsal projection in dorsal view gradually narrowing distad, in lateral view with weakly rounded dorsal margin.

Description. Body of male ( Fig. 214 View FIGURES214–221 ) strongly convex, oval, with shallow and indistinct constriction between pronotum and elytra, moderately dark brown with slightly lighter tarsi, covered with light brown setae. BL 1.43– 1.58 mm.

Head broadest across large and moderately strongly convex, coarsely faceted eyes, HL 0.20–0.23 mm, HW 0.35 mm; frontovertexal region weakly convex at middle; supraantennal tubercles weakly elevated. Punctures on median region of clypeus virtually absent, few distinct punctures present on lateral regions of clypeus, punctures on median area of frontovertexal region small but distinct, sharply marked and separated by spaces subequal to their diameters, those on lateral areas of frontovertexal region distinctly denser, separated by spaces slightly shorter than their diameters; setae short, sparse and suberect. Antennae long and slender, gradually thickened, AnL 0.68–0.75 mm, antennomere 1 and 2 each slightly elongate, 3–7 each about as long as broad, 8–10 each slightly transverse, 11 about as long as 9 and 10 combined, about 1.8 × as long as broad.

Pronotum semi-oval, strongly convex at middle and flattened near anterior and hind corners, broadest at base; PL 0.45–0.48 mm, PW 0.65–0.70 mm. Anterior margin in strictly dorsal view nearly straight; lateral margins strongly rounded in anterior third and nearly 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 nearly equidistant to posterior and lateral pronotal margin. Punctures on median region of pronotal disc slightly smaller than on head but distinct and separated by spaces subequal to their diameters, punctures near anterior and posterior corners much denser and coarse; setae short and moderately dense, suberect.

Elytra slightly wider than pronotum, together oval, broadest near anterior third; EL 0.75–0.88 mm, EW 0.65– 0.75 mm, EI 1.15–1.17; subhumeral lines developed as sharp borders between elevated humerus and lower mesal region, as long as 0.30 × EL and weakly divergent posterad; basal elytral fovea on each elytron nearly equidistant to lateral margin of mesoscutellum and subhumeral line; elytral apices separately rounded. Punctures on elytra fine and inconspicuous; setae similar to those on pronotum.

Of three studied males, two have functional wings and one is wingless.

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

Legs long and slender, unmodified.

Aedeagus ( Figs 215–217 View FIGURES214–221 ) AeL 0.43 mm; in ventral view with capsular region of median lobe with shallowly bisinuate distal margin, and its distal margin in lateral view rounded, lacking emargination or indentation; subapical dorsal projection in dorsal view gradually narrowing distad, in lateral view with weakly rounded dorsal margin; parameres indiscernible.

Female. Externally indistinguishable from male, wings not studied. BL 1.49–1.50; HL 0.21–0.23 mm, HW 0.35 mm, AnL 0.70–0.73 mm; PL 0.48–0.50 mm, PW 0.68–0.70 mm; EL 0.78–0.80 mm, EW 0.70 mm, EI 1.11–1.14.

Distribution. S China: Yunnan.

Etymology. As in all four members of the C. longilinguis group, the name is an adjective derived from the Latin lingua, a tongue, referring to the tongue-like subapical dorsal projection of the aedeagus.

Remarks. Within the C. longilinguis group, C. linguatus can be identified by the following combination of characters: in lateral view, distal margin of the capsular region of median lobe convex and rounded, and dorsal margin of the subapical dorsal projection weakly and evenly convex.