Cephennodes (Cephennodes) bicribratus, Jałoszyński, 2016

Jałoszyński, Paweł, 2016, The Cephenniini of China. VIII. New species and new records of Cephennodes Reitter of Hunan, Jiangxi, Zhejian and Fujian (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 4079 (4), pp. 415-428 : 426-427

Cephennodes (Cephennodes) bicribratus sp. n.

( Figs 10−11 , 24–25 )

Type material. Holotype: CHINA (ZHEJIANG Prov.): ♂, two labels: " China: S Zhejiang, Lishui City / Fengyang Shan N.R., forest nr. / Datianping, 27º54'33''-55'18'', / 119º10'20''-17''E, mixed litter, / moss, sifted, 1170- 1300 m, 6.x. / 2013, Feng, Peng, Yu, Yin leg." [white, printed]; " CEPHENNODES (s. str.) / bicribratus m. / det. P. Jałoszyński, 2015 / HOLOTYPUS " [red, printed] ( SNUC).

Diagnosis. Body small, 1.3 mm in length, relatively stout, EI clearly below 1.2; elytral patches of short setae not impressed and distant from lateral elytral margins, visible in dorsal view; in dorsal view elytra not rapidly narrowing posteriorly from broadest place; aedeagus in lateral view with dorsal apical projection weakly recurved, not hook-shaped.

Description. Body of male ( Fig. 10 ) strongly convex, oval, with shallow but distinct constriction between pronotum and elytra, brown with slightly lighter legs and palps, covered with light brown vestiture. BL 1.30 mm.

Head broadest at moderately large but strongly convex and coarsely faceted eyes, HL 0.18 mm, HW 0.31 mm; vertex weakly and evenly convex and anteriorly confluent with frons; frons weakly convex. Punctures on vertex, frons and clypeus fine and shallow, with moderately sharp margins, but very dense, separated by spaces shorter than diameters of punctures; setae short, sparse, suberect. Antennae short, AnL 1.68 mm, antennomere I about as long as broad, II–VII distinctly elongate (VII the longest), VIII about as long as broad, IX slightly (indistinctly) elongate, X slightly transverse, XI about as long as IX–X together, broader than IX, about twice as long as broad.

Pronotum semi-oval, strongly convex at middle and very indistinctly flattened near hind corners, broadest near middle and distinctly narrowing posteriorly; PL 0.43 mm, PW 0.60 mm. Anterior margin in strictly dorsal view nearly straight; lateral margins strongly rounded in anterior half and nearly straight in posterior third; posterior pronotal corners slightly obtuse-angled; posterior margin shallowly bisinuate; lateral marginal carinae very narrow and demarcated from disc in posterior 3/4; lateral antebasal pits shallow but distinct, each slightly closer to posterior than to lateral pronotal margin. Punctures on pronotal disc very fine, shallow but very dense, those in median area so fine that barely discernible as separate punctures, making the surface appear matte, punctures near each anterior pronotal corner distinct, small but sharply marked, relatively deep but not coarse, separated by spaces shorter than diameters of punctures; setae short, sparse, suberect.

Elytra about as convex as pronotum and distinctly broader, oval, broadest near anterior third; EL 0.70 mm, EW 0.63 mm, EI 1.12; subhumeral lines carinate but moderately distinct, as long as 0.32× EL and distinctly divergent caudad, additionally each elytron with narrow but distinct humeral carina shorter than subhumeral line; basal elytral fovea on each elytron located closer to lateral margin of mesoscutellum than to subhumeral line; patch of modified setae on each elytron ( Fig. 11 ) not impressed, located behind middle and distant from lateral elytral margin, partly visible in dorsal view, large, oval and covered with very short setae and very fine, dense punctures. Punctures on elytra, except impressed areas, very fine and superficial, unremarkable; setae as long and dense as those on pronotum but slightly more suberect. Hind wings well-developed.

Metaventrite lacking lateral impressions, convex.

Legs long and slender; all tibiae nearly straight.

Aedeagus ( Figs 24–25 ) latus form, AeL 0.33 mm; median lobe in ventral view elongate, broadest near base and gradually narrowing distally; capsular part of median lobe with shallow and rounded emargination of ventral apical margin; apical projections long, in lateral view dorsal apical projection slightly recurved and pointing dorsodistally but not hook-shaped; parameres moderately broad, each with two long apical setae.

Female. Unknown.

Distribution. SE China: Zhejiang Province.

Etymology. The name bicribratus (Latin cribrum, a sieve) refers to the elytral modifications that appear as oval finely microsculptured areas resembling sieves.

Remarks. This is the only member of the Cephennodes elytratus species group with unimpressed patches of modified setae on elytra. See also remarks for C. datianpingensis .

Figures

FIGURES 9 – 11. Dorsal habitus of males (9, 10) and left elytron of male in left lateral view (11). Cephennodes (s. str.) datianpingensis sp. n. (9); Cephennodes (s. str.) bicribratus sp. n. (10 – 11).

FIGURES 16 – 25. Aedeagus in ventral (16, 18, 20) and lateral (17, 19, 21) views. Cephennodes (s. str.) hystrix sp. n. (16 – 17); Cephennodes (s. str.) setifer sp. n. (18 – 19); Cephennodes (s. str.) yinziweii sp. n. (20 – 21); Cephennodes (s. str.) datianpingensis sp. n. (22 – 23); Cephennodes (s. str.) bicribratus sp. n. (24 – 25).