Cephennodes (Cephennodes) datianpingensis, 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 : 424-425

Cephennodes (Cephennodes) datianpingensis sp. n.

( Figs 9 , 22–23 )

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.) / datianpingensis m. / det. P. Jałoszyński, 2015 / HOLOTYPUS " [red, printed] ( SNUC).

Diagnosis. Body small, 1.25 mm in length, slender, EI around 1.2; elytral patches of very short setae impressed and located so close to lateral elytral margins that they are not visible in dorsal view; in dorsal view elytra rapidly narrowing posteriorly from broadest place located just in front of lateral impressions; aedeagus in lateral view with dorsal apical projection evenly curved dorsally, forming rounded hook.

Description. Body of male ( Fig. 9 ) moderately strongly convex, oval, with shallow constriction between pronotum and elytra, brown with slightly lighter legs and palps, covered with light brown vestiture. BL 1.25 mm.

Head broadest at moderately large but strongly convex and coarsely faceted eyes, HL 0.15 mm, HW 0.29 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, proximal flagellomeres particularly narrow, AnL 1.65 mm, antennomere I slightly elongate, II–VIII distinctly elongate (VII the longest), IX about as long as broad, X transverse, XI about as long as IX–X together, broader than IX, about twice as long as broad.

Pronotum semi-oval, moderately strongly convex at middle and very indistinctly flattened near hind corners, broadest slightly behind middle but barely discernibly narrowing posteriorly; PL 0.38 mm, PW 0.53 mm. Anterior margin in strictly dorsal view nearly straight; lateral margins strongly rounded in anterior half and very weakly so in posterior third; posterior pronotal corners nearly right-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 nearly equally distant from lateral and posterior pronotal margin. Punctures on pronotal disc fine and unremarkable (also near anterior corners); setae short, sparse, suberect.

Elytra about as convex as pronotum and distinctly broader, drop-shaped, broadest near anterior third and strongly narrowing posteriorly; EL 0.73 mm, EW 0.60 mm, EI 1.21; subhumeral lines carinate but moderately distinct, as long as 0.30× EL and distinctly divergent caudad; basal elytral fovea on each elytron located closer to lateral margin of mesoscutellum than to subhumeral line; patch of modified setae on each elytron distinctly impressed, located just behind broadest site and adjacent to lateral elytral margin, not visible in dorsal view, small, oval and covered with very short setae and very fine, dense punctures. Punctures on elytra, except impressed areas, very fine and superficial, unremarkable; setae distinctly longer than those on pronotum, moderately dense and suberect, those on sides on and in front of widest site more suberect than on remaining surface. Hind wings welldeveloped.

Metaventrite lacking lateral impressions, convex.

Legs long and slender; all tibiae nearly straight.

Aedeagus ( Figs 22–23 ) latus form, AeL 0.33 mm; median lobe in ventral view elongate, broadest near base and gradually narrowing distally; capsular part of median lobe in ventral view with straight apical margin; apical projections short, in lateral view dorsal apical projection slightly curved dorsally forming short hook; parameres moderately broad, each with two apical setae.

Female. Unknown.

Distribution. SE China: Zhejiang Province.

Etymology. Locotypical, after the locality name Datianping.

Remarks. This is the smallest (BL 1.25 mm vs. 1.30 in C. bicribratus sp. n. and 1.41–1.46 mm in C. elytratus ) and most slender (EI 1.21 vs. 1.12 in C. bicribratus and 1.11–1.13 in C. elytratus ) member of the Cephennodes elytratus group. The aedeagus of C. datianpingensis is distinctly stouter than those of the remaining two species, and its dorsal apical projection is evenly curved dorsally and hook-shaped, whereas in the aedeagus of C. bicribratus the projection is weakly recurved and slightly bent dorsally, but not hook-shaped, and that of C. elytratus is only slightly curved and nearly parallel in relation to the long axis of aedeagus.

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).