Cephennodes (Cephennodes) pseudobos, Jałoszyński, Paweł, 2015

Jałoszyński, Paweł, 2015, The Cephenniini of China. VI. New species and new records of Cephennodes Reitter from Hainan, Guangxi and Guangdong (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 3990 (2), pp. 221-234 : 227-229

Cephennodes (Cephennodes) pseudobos sp. n.

( Figs 2 , 7 , 12–13)

Type material. Holotype: CHINA (Guangxi Prov.): ♂, two labels: "Guangxi Prov. / Lin'gui County / Huaping N.R. / Anjiangping / 17-VII-2011, alt. 1400–1700 m, HE W.-J. & TANG L. leg." [white, printed]; " CEPHENNODES (s. str.) / pseudobos m. / det. P. Jałoszyński, '15 / HOLOTYPUS' [red, printed] ( SNUC). Paratypes (4 exx.): 1 ♀, same data as holotype; 1 ♂, 1 ♀, same data as holotype except 1200 and 1500 m, 13-VII- 2011 and 18-VII-2011; 1 ♂, Jinxiu County, Mt. Shengtangshan, alt. 1200–1400 m, 25-VII-2011, Hu & Yin leg. ( SNUC, cPJ).

Diagnosis. Frons with median longitudinal line composed of loosely distributed punctures; projection of antennomere III long and slender; median lobe of aedeagus in ventral view oval and with rounded apex.

Description. Body of male ( Fig. 2 ) strongly convex, oval with feebly marked constriction between pronotum and elytra, dark brown with slightly lighter legs and distinctly lighter palps, covered with light brown vestiture. BL 2.08–2.18 mm.

Head ( Fig. 7 ) broadest at moderately large but strongly convex and coarsely faceted eyes, HL 0.33 mm, HW 0.53 mm; vertex weakly and evenly convex and anteriorly confluent with frons; frons weakly convex; supraantennal tubercles distinct, area anteromesal to each tubercle slightly impressed; clypeus distinctly thickened, slightly elevated. Punctures on vertex and frons distinct and sharply marked, unevenly distributed and of various diameters, frons with median longitudinal line composed of loosely distributed small punctures, narrow area at each side of line nearly impunctate, vertex and sides of frons with slightly larger and denser punctures, largest punctures are located in impressed area anteromesal to supraantennal tubercles; setae sparse, long and suberect. Antennae moderately long, three terminal antennomeres distinctly and gradually broadening, AnL 1.13–1.15 mm, antennomere I only slightly longer than broad, II slightly transverse, III distinctly elongate, with subtriangular dorsal projection much longer than length of antennomere, with slightly curved and pointed apex, antennomeres IV–VII each slightly elongate, VIII–X each about as long as broad or slightly transverse, XI 2.2× as long as broad, distinctly broader than X, minimally longer than antennomeres IX–X together, with pointed apex.

Pronotum semi-oval, strongly convex at middle and distinctly flattened near hind corners, broadest near middle; PL 0.68–0.73 mm, PW 0.95–0.98 mm. Anterior margin in strictly dorsal view nearly straight; lateral margins strongly rounded in anterior half and nearly straight in posterior third, sides posteriorly slightly but distinctly convergent toward nearly right-angled and acute posterior pronotal corners; posterior margin deeply bisinuate; lateral marginal carinae near posterior corners sharply demarcated from disc, narrowing anteriorly; lateral ante-basal pits shallow but distinct, each located much closer to posterior than to lateral pronotal margin. Punctures on median part of pronotal disc small but distinct, deep and with sharp margins, separated by spaces as wide as 1–1.5 diameters of punctures; punctures toward anterior and posterior pronotal margins reducing in size and depth, those near posterior margin are also sparser, laterally punctures becoming gradually larger, denser and deeper, so that a large area adjacent to each anterior corner is covered with coarse punctures separated by narrow wrinkles. Setae on pronotal disc long and moderately dense, suberect to erect.

Elytra slightly more convex than pronotum, oval, broadest between middle and anterior third; EL 1.08–1.13 mm, EW 1.03–1.05 mm, EI 1.05–1.07; subhumeral lines carinate, sharply marked, as long as 0.47× EL and distinctly divergent caudad; basal elytral fovea on each elytron located at middle between lateral margin of mesoscutellum and subhumeral line; elytral apices unmodified, separately rounded. Punctures on elytra much less distinct than those on pronotal disc, shallow, small and unremarkable; setae distinctly longer than those on pronotum, dense and erect. Hind wings well-developed.

Metaventrite without lateral impressions, convex.

Legs moderately long and slender; all tibiae nearly straight.

Aedeagus (Figs 12–13) simonis form, AeL 0.35 mm; median lobe in ventral view oval and with broadly rounded apex; apical projections long and broad, in lateral view with long, slender and weakly curved apical hook; parameres slender, each with one apical and two subapical setae.

C. bos Jałoszyński C. bubalus Jałoszyński C. buceros Jałoszyński C. pseudobos & Nomura & Nomura & Nomura Jałoszyński Female. Differs from male in unmodified antennomere III and frons without longitudinal punctate line. BL 2.15–2.23 mm; HL 0.28–0.33 mm, HW 0.55–0.58 mm, AnL 1.13–1.15 mm; PL 0.75–0.78 mm, PW 0.98–1.03 mm; EL 1.13 mm, EW 1.05–1.08 mm, EI 1.05–1.07.

Distribution. SE China: Guangxi Province.

Etymology. The specific epithet pseudobos refers to the similarity of the new species to Cephennodes bos .

Remarks. Species of the Cephennodes bos group have very uniform appearance and their aedeagi differ only in minor but important details. Both external and genital characters of males must be examined to identify species, and females can be assigned to a species only if they were collected together with males on the same spot. Cephennodes pseudobos differs from C. bos and C. bubalus (both known from Vietnam) in the rounded and not subtriangular apex of the median lobe. The third Vietnamese species of this complex, C. buceros , has the aedeagus nearly identical as that of C. pseudobos . However, C. pseudobos is larger (BL 2.08–2.18 mm in C. pseudobos vs. 1.94–1.96 mm in C. buceros ), has distinctly larger and deeper punctures on the head and pronotum, and much more elongate projection of the antennomere III, more similar to that of C. bos . Major morphological differences between species of the Cephennodes bos group are compiled in Table 2 .

Figures

FIGURES 1 – 5. Dorsal habitus of holotype males. Cephennodes bicavatus sp. n. (1); Cephennodes pseudobos sp. n. (2); Cephennodes huapingensis sp. n. (3); Cephennodes elevatus sp. n. (4); Cephennodes gaozhaianus sp. n. (5).

FIGURES 6 – 9. Head of holotype males in anterodorsal view. Cephennodes bicavatus sp. n. (6); Cephennodes pseudobos sp. n. (7); Cephennodes huapingensis sp. n. (8); Cephennodes elevatus sp. n. (9).

Tables

TABLE 2. Major morphological differences between males of species within the Cephennodes bos species group.

Body length [mm]	2.09–2.22	2.02	1.94–1.96	2.08–2.18
Elytral index	1.11–1.12	1.15	1.11–1.13	1.05–1.07
Anterior margin of head in dorsal view	subtrapezoidal	rounded	rounded	subtrapezoidal
Anteromedian setal brush on frons	absent	present	absent	absent
Median punctate line on frons	broad, flanked by narrow impunctate areas	narrow, flanked by broad impunctate areas	broad, flanked by broad impunctate areas	broad, flanked by narrow impunctate areas
Antennomere VII	about twice as long as broad	1.5× as long as broad	1.5× as long as broad	1.2× as long as broad
Antennomere XI	much shorter than IX– X together	nearly as long as IX–X together	slightly shorter than IX–X together	indistinctly longer than IX–X together
Apex of median lobe of aedeagus	subtriangular	subtriangular	broadly rounded	broadly rounded