Cephennococcus penangensis, Jałoszyński, 2019

Jałoszyński, Paweł, 2019, Four new Oriental species of the ‘ Cephennomicrus group’ (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 4679 (3), pp. 553-562 : 554-555

Cephennococcus penangensis sp. n.

( Figs 1 , 7–10 )

Type material. Holotype: W MALAYSIA (Penang): ♂, two labels: „ WEST MALAYSIA / Penang Island: above / Botanical Garden / 250m 12.xi.1999 #4a / Cuccodoro & Löbl / sifting leaf litter“ [white, printed], „ CEPHENNO- COCCUS / penangensisi m. / P. Jałoszyński, 2019 / HOLOTYPUS “ [red, printed] ( MHNG).

Diagnosis. BL 0.83 mm; aedeagus stout, with subtriangular apical region, endophallic structures nearly symmetrical in distal half, composed of median tubular structure flanked in its distal portion by elongate, irregular in shape sclerites and in its proximal portion by a pair of large oval structures.

Description. Body of male ( Fig. 1 ) stout and strongly convex, uniformly reddish brown, except for appendages, which are slightly lighter; setae silverish; BL 0.83 mm.

Head broadest at large, strongly convex eyes, 0.13 mm, HW 0.20 mm; vertex and frons confluent, together weakly convex; supraantennal tubercles small and weakly elevated but well defined; frons with a pair of tiny frontal glands each at mesal margin of eye. Punctures on frons and vertex small and shallow but distinct, densely and evenly distributed, nearly touching each other; setae extremely short, barely discernible under magnification 80 ×. Antennae slender, with distinct, dimerous club, AnL 0.30 mm, antennomeres I and II each elongate, III–IX each about as long as broad or indistinctly transverse, IX transverse, asymmetrical, distinctly projecting laterally; X about as long as broad, also asymmetrical and projecting in a similar way as X.

Pronotum strongly convex, semicircular, broadest shortly in front of base; PL 0.25 mm, PW 0.38 mm; anterior and lateral margins broadly rounded; posterior corners weakly obtuse-angled; posterior margin shallowly bisinuate. Punctures on pronotal disc small but sharply marked and conspicuously dense, nearly touching each other; setae very short and nearly recumbent, dense, discernible under magnification 40 ×.

Elytra together oval, broadest distinctly in front of middle; EL 0.45 mm, EW 0.41 mm, EI 1.09; humeral calli indistinct; subhumeral lines fine but sharply marked, about as long as 1/3 of EL; elytral apices separately rounded. Punctures on elytra smaller and shallower than those on pronotum, dense; setae similar to those on pronotum

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 7–10 ) stout; AeL 0.15 mm; median lobe with subtriangular apical region and nearly sym- metrical endophallic structures in distal half, composed of median tubular structure flanked by elongate, irregular in shape sclerites distally and a pair of large oval structures proximally; parameres slender, each with one long and one very short apical setae.

Female. Unknown.

Distribution. West Malaysia, Penang Island at the western coast of the Malay Peninsula.

Etymology. Locotypical, after the Penang state and island.

Remarks. The aedeagus of C. penangensis resembles most that of C. minutissimus Jałoszyński, 2011 (Pahang) , but the shape of apical region of median lobe and the endophallic structures in the subapical area are clearly different. Moreover, C. penangensis has large adults (BL 0.83 mm), whereas C. minutissimus , as its name indicates, is the smallest Cephennococcus species, with BL merely 0.58 mm.

Figures

FIGURES 1–6. Dorsal habitus of holotypes (1–4), head in dorsofrontal view (5), head and pronotum in dorsal view (6). Ce- phennococcus penangensis sp. n. (1); Cephennomicrus matangensis sp. n. (2, 5–6); Cephennomicrus selangorensis sp. n. (3); Trurlia nova sp. n. (4). Abbreviations: abg, antebasal groove; abp, antebasal pit.

FIGURES 7–14. Aedeagus in ventral (7, 9, 11, 13) and lateral (8, 10, 12, 14) views. Cephenococcus penangensis sp. n. (7–10); Cephennomicrus matangensis sp. n. (11–14).