Cephennodes (Cephennodes) monofoveatus, Jałoszyński, Paweł, 2015

Jałoszyński, Paweł, 2015, The Cephenniini of China. VII. New species and new records of Cephennodes Reitter of Shaanxi, Gansu and Sichuan (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 4033 (3), pp. 393-410 : 398-399

Cephennodes (Cephennodes) monofoveatus sp. n.

( Figs 4–5 , 15–16 )

Type material. Holotype: CHINA (Shaanxi Province): ♂, two labels: " CHINA: S-Shaanxi [ CH 12-32] / Micang Shan, 42 km S Hanzhong, / 32º40'43''N, 106º48'33''E, 1090 m, / stream valley, shady S-slope, sec. / mixed forest, litter, grass & herbs nr. / path sifted, 17.VIII.2012, M. Schülke" [white, printed]; " CEPHENNODES (s. str.) / monofoveatus m. / det. P. Jałoszyński, '15 / HOLOTYPUS " [red, printed] (cMS). Paratype: 1 ♂, same data as holotype except "[ CH 12-29]", " 30 km S Hangzhong, 32º45'56''N, 106º53'57''E, 1070 m, stream valley, litter and soil sifted, 15.VIII.2012 " (cPJ).

Diagnosis. This is the only member of the taurus group with a small round, shallow and indistinctly demarcated impression on the frons in males.

Description. Body of male ( Fig. 4 ) strongly convex, oval with feebly marked constriction between pronotum and elytra, dark brown with slightly lighter legs and palps, covered with yellowish vestiture; BL 1.63–1.68 mm.

Head ( Fig. 5 ) broadest at moderately large, strongly convex and coarsely faceted eyes, HL 0.23 mm, HW 0.40– 0.43 mm; vertex and frons confluent and flattened, frons with large but shallow and diffused median impression about as long as broad and larger than eye. Punctures on vertex and frons very fine but dense; setae sparse and moderately long, suberect to erect, also median impression with similar setae. Rod-like modified setae much longer than eye. Antennae moderately long, five terminal antennomeres distinctly and gradually broadening, AnL 0.85 mm, antennomere I shorter than broad, II distinctly but weakly elongate, III indistinctly transverse, IV–VI each about as long as broad, VII distinctly elongate, VIII–X each slightly transverse, XI about as long as IX–X together, 2.2× as long as broad, pointed at apex.

Pronotum in strictly dorsal view subtrapezoidal, strongly convex at middle and distinctly flattened near hind corners, broadest near middle; PL 0.53 mm, PW 0.73–0.75 mm. Anterior margin nearly straight; lateral margins strongly rounded in anterior half and weakly in posterior fourth, only slightly convergent toward nearly rightangled hind pronotal corners; posterior margin distinctly bisinuate; lateral marginal carinae indistinctly thickened and near posterior pronotal corners indistinctly demarcated from disc; lateral antebasal 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, moderately deep and with sharp margins, separated by spaces equal to or slightly wider than diameters of punctures; punctures toward anterior and posterior pronotal margins reducing in size and depth, those near lateral margins becoming denser but not larger or deeper, area adjacent to each anterior corner covered with fine and dense but not coarse punctures. Setae on pronotal disc long and sparse, suberect.

Elytra as convex as pronotum, oval, broadest near anterior third; EL 0.88–0.93 mm, EW 0.80 mm, EI 1.09– 1.16; subhumeral lines carinate, sharply marked, as long as 0.54 EL and distinctly divergent caudad; basal fovea on each elytron located closer to lateral margin of mesoscutellum than to subhumeral line; elytral apices unmodified, separately rounded. Punctures on elytra much less distinct than those on pronotal disc, superficial, small but dense; setae similar to those on pronotum. Hind wings well developed, about twice as long as elytra.

Metaventrite without lateral impressions, convex.

Legs moderately long and slender; all tibiae nearly straight.

Aedeagus ( Figs 15–16 ) simonis form, AeL 0.35 mm; median lobe in ventral view drop-shaped with narrow subtriangular and strongly protruding apex; apical projections short, with short apical hook weakly and evenly curved dorsally; dorsal wall with only very short and sparse, barely discernible subapical setae; parameres slender, each with one apical and two subapical setae.

Female. Unknown.

Distribution. Central China: Shaanxi Province.

Etymology. The specific epithet monofoveatus refers to the single frontal pit.

Remarks. Within the taurus species group, only three species have single (and not paired or absent) impression on the frons: C. taurus , C. qiongdaoanus and C. clypeicornis . However, each of these species has a broad, transverse impression across frons, and not circular shallow pit at middle of frons, as C. monofoveatus .

Figures

FIGURES 1 – 10. Dorsal habitus of holotype males (1, 4, 6, 9, 10), elytral apices in dorsal (2) and posterodorsal (3) views; head of male in dorsolateral view (5); abdomen of male in ventral (7) and lateral (8) views. Cephennodes (s. str.) intricatus sp. n. (1 – 3); Cephennodes (s. str.) monofoveatus sp. n. (4 – 5); Cephennodes (s. str.) pinnapes sp. n. (6 – 8); Cephennodes (s. str.) elegantissimus sp. n. (9); Cephennodes (s. str.) palpalis sp. n. (10). Abbreviations: ai, apical impression; csf, circumsutural flattening; csr, C-shaped ridge; sb, setal brush; s 3 – 8, abdominal sternite III – VIII.

FIGURES 11 – 18. Aedeagus in ventral (11, 13, 15, 17) and lateral (12, 14, 16, 18) views. Cephennodes (s. str.) intricatus sp. n. (11 – 12); Cephennodes (s. str.) cryptointricatus sp. n. (13 – 14); Cephennodes (s. str.) monofoveatus sp. n. (15 – 16); Cephennodes (s. str.) pinnapes sp. n. (17 – 18).