Cephennomicrus andreasi, Jałoszyński, 2019

Jałoszyński, Paweł, 2019, The Cephenniini of China. IX. Cephennomicrus Reitter of Yunnan (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 4629 (2), pp. 280-286 : 283-285

Cephennomicrus andreasi sp. n.

(Figs 3, 7–9, 14–17)

Type material. Holotype: ♂, two labels: " CHINA: Yunnan [CH07-11], / Baoshan Prf., Gaoligong Shan, / nr. Xiao- heishan N.R., 35 km SE / Tengchong , 2100 m, / 24°50'16''N, 98°45'43''E, decid. / forest, litter, sifted, 30.V.2007, / leg. A. Pütz " [white, printed], " CEPHENNOMICRUS / andreasi m. / det. P. Jałoszyński, 2019 / HOLOTYPUS " [red, printed] (cAP).

Diagnosis. BL ~ 0.90 mm; head in males unmodified; body with very short and recumbent pubescence, barely noticeable on elytra; punctures on pronotum inconspicuous, only slightly larger, deeper and denser than those on head and elytra, moderately densely distributed; antenna with transverse and weakly broadened antennomere IX and strongly enlarged antennomeres X and XI; pronotal base with two pairs of pits, lacking transverse groove; aedeagus drop-shaped, with subtriangular apical portion, subtriangular ventral apical plate, nearly symmetrical endophallus with two bunches of needle-like sclerites, and slender parameres.

Description. Body of male (Fig. 3) moderately stout, strongly convex, umber brown; setae silverish; BL 0.89 mm.

Head (Fig. 7) broadest at large, strongly convex and coarsely faceted eyes; HL 0.11 mm, HW 0.23 mm; frons and vertex confluent, evenly and weakly convex, unmodified; supraantennal tubercles feebly elevated; clypeus unmodified. Punctures on frons and vertex inconspicuous, very fine; setae very short and recumbent, sparse, barely noticeable. Antennae (Fig. 9) slender, with distinctly delimited dimerous club; AnL 0.39 mm, antennomeres I–II strongly elongate, III–IV each about as long as broad, V–VIII each indistinctly elongate, IX slightly broader but not longer than VII, slightly transverse, X much broader and longer than IX, distinctly transverse, XI slightly broader and distinctly longer than X, slightly shorter than IX–X combined, about as long as broad, with slightly asymmetri- cal, rounded apex.

Pronotum (Fig. 8) rectangular and transverse, broadest near anterior fourth; PL 0.25 mm, PW 0.33 mm; ante- rior margin weakly arcuate; lateral margins microserrate, strongly rounded in anterior third and nearly straight in posterior half, where they are indistinctly converging posterad; posterior margin shallowly bisinuate at sides, with distinct shallow emargination in front of scutellum; base with two lateral pairs of distinct, deep circular pits, lack- ing transverse groove. Punctures on pronotal disc inconspicuus, fine and shallow; setae longer than those on head, sparse, recumbent; additionally pronotum with one lateral pair of macrosetae, near posterior corners.

Elytra (Fig. 3) oval, broadest near anterior fourth; EL 0.53 mm, EW 0.41 mm, EI 1.27; humeral calli distinct; apices separately rounded. Punctures on elytra inconspicuous, very fine and superficial; setae very short, recumbent and sparse, barely noticeable; macrosetae not found.

Hind wings present, long.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 14–17 ) relatively stout; AeL 0.15 mm; median lobe in ventral view drop-shaped, with two distinct apical plates (dorsal and ventral), both subtriangular in shape and rounded at apices; ventral diaphragm con- spicuously large, circular, sub-basal; endophallus with a subapical pair of moderately darkly sclerotized bunches of needle-like sclerites; parameres long and slender, each with one tiny apical and one similarly short subapical setae.

Female. Unknown.

Distribution. China: Yunnan.

Etymology. This species is dedicated to the collector of the holotype, a renowned specialist on Byrrhidae , An- dreas Pütz.

Remarks. Cephennomicrus andreasi differs from C. fujianus in the aedeagus, which is stouter and has a clearly different shape. It is, however, very similar to C. japonigenus of Fujian, which also has the median lobe dropshaped, and the endophallus with two symmetrical bunches of needle-like sclerites. The shape of the median lobe, especially its apical portion (both in ventral and lateral views) is clearly different in these species; the ventral dia- phragm in C. andreasi is conspicuously large, whereas that of C. japonigenus is exceptionally small. Moreover, the antennomere IX in C. andreasi is transverse, and in C. japonigenus distinctly elongate. The aedeagus of C. andreasi is also somewhat similar to that of C. pseudojaponigenus Jałoszyński, 2009a (Ishigaki-jima) and C. taitungensis Jałoszyński, 2009a ( Taiwan) , but shapes of the median lobes, especially their apical regions, are clearly different.

Figures

FIGURES 10–17. Cephennomicrus yunnanicus sp. n. (10–13) and C. andreasi sp. n. (14–17). Aedeagus in ventral (10, 12, 14, 16) and lateral (11, 13, 15, 17) views.