Cephennodes (Cephennodes) yinziweii, 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 : 422-423

Cephennodes (Cephennodes) yinziweii sp. n.

( Figs 8 , 20–21 )

Type material. Holotype: CHINA (ZHEJIANG Prov.): ♂, two labels: " China: S Zhejiang, Lishui City / Longguan, Fengyang Shan N.R. / mixed forest nr. Luao Vil., 27º / 55' 00''N, 119º11'53''E, moss, / fern, bamboo, bush, sifted, 11 / 30 m, 4.x.2013, Z.-W. Yin leg." [white, printed]; " CEPHENNODES (s. str.) / yinziweii m. / det. P. Jałoszyński, 2015 / HOLOTYPUS " [red, printed] ( SNUC).

Diagnosis. Antennae distinctly shorter than elytra, all antennomeres except I elongate; elytral apices unmodified, each elytron with several long erect setae but lacking penicilli; median lobe of aedeagus with deep and narrow emargination in ventral apical margin.

Description. Body of male ( Fig. 8 ) strongly convex, oval, with very shallow constriction between pronotum and elytra, brown with slightly lighter legs and palps, covered with light brown vestiture. BL 1.45 mm.

Head broadest at moderately large but strongly convex and coarsely faceted eyes, HL 0.18 mm, HW 0.33 mm; vertex weakly and evenly convex and anteriorly confluent with frons; frons flattened. Punctures on vertex and frons very small but sharply marked and very dense, nearly evenly distributed on entire dorsal surface, punctures separated by spaces equal to or shorter than their diameters; setae sparse, short, suberect. Antennae moderately long, AnL 0.78 mm, antennomeres except I elongate (X weakly so; VII the longest), XI slightly shorter than IX–X together.

Pronotum semi-oval, strongly convex at middle and weakly flattened near hind corners, broadest slightly anterior to middle but barely discernibly narrowing posteriorly; PL 0.45 mm, PW 0.60 mm. Anterior margin in strictly dorsal view slightly arcuate; lateral margins strongly rounded in anterior half and nearly straight in posterior third; posterior pronotal corners nearly right-angled; posterior margin shallowly bisinuate; lateral marginal carinae very narrow and demarcated from disc almost on entire length; lateral antebasal pits shallow but distinct, each located distinctly closer to lateral than to posterior pronotal margin. Punctures on median part of pronotal disc distinctly larger than those on head, moderately deep and with sharp margins, those in median area separated by spaces equal to or slightly shorter than diameters of punctures; punctures toward anterior and posterior pronotal margins reduced in size and depth, anterolateral punctures becoming gradually larger, denser and deeper, so that a large area adjacent to each anterior corner is covered with distinctly denser, larger and coarse punctures separated by narrow wrinkles. Setae on pronotal disc moderately long and dense, suberect, additionally pronotum with four pairs of longer and more erect setae: one submedially near anterior pronotal margin, one near middle of lateral margin, one near posterior corner and one submedially near posterior margin. These longer setae are strikingly long and easily noticeable, except the pair near anterior pronotal margin.

Elytra about as convex as pronotum and slightly narrower, oval, broadest between middle and anterior third; EL 0.83 mm, EW 0.70 mm, EI 1.18; subhumeral lines carinate but moderately distinct, as long as 0.40× EL and distinctly divergent caudad; basal elytral fovea on each elytron located closer to lateral margin of mesoscutellum than to subhumeral line; elytral apices unmodified. Punctures on elytra superficial, unremarkable; setae similar to those on pronotum but slightly longer and more suberect, additionally each elytron with very long, sparse and strongly erect setae, especially on sides and in posterior third. Hind wings well-developed.

Metaventrite lacking lateral impressions, convex.

Legs long and slender; all tibiae nearly straight.

Aedeagus ( Figs 20–21 ) latus form, AeL 0.38 mm; median lobe in ventral view elongate, broadest near base and gradually narrowing distally; capsular part of median lobe with deep and narrow emargination of ventral apical margin; apical projections long, in lateral view dorsal apical projection strongly hook-like curved dorsally; parameres moderately broad, each with two robust apical setae.

Female. Unknown.

Distribution. SE China: Zhejiang Province.

Etymology. The species is dedicated to the Chinese specialist on Pselaphinae , Zi-Wei Yin, who collected this and many other interesting specimens of Cephennodes .

Remarks. Cephennodes yinziweii is one of only two species in the Cephennodes longipes group with unmodified elytral apices, the other one being C. guizhouanus . These two species differ clearly in different body shape and proportions of body parts; the capsular part of median lobe in C. yinziweii has a very deep and narrow emargination in its ventral apical margin, such a structure is missing in C. guizhouanus .

Figures

FIGURES 5 – 8. Dorsal habitus of males (5, 7, 8) and elytral apex of male in posterodorsal view (6). Cephennodes (s. str.) hystrix sp. n. (5 – 6); Cephennodes (s. str.) setifer sp. n. (7); Cephennodes (s. str.) yinziweii sp. n. (8).

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).