Cephennula penrissenana, Jałoszyński, Paweł, 2011

Jałoszyński, Paweł, 2011, Ten new species of Cephennula Jałoszyński (Coleoptera, Staphylinidae, Scydmaeninae) from Malaysia, Zootaxa 3113, pp. 36-52 : 42-43

Cephennula penrissenana sp. n.

( Figs. 6 , 19, 20)

Holotype: E MALAYSIA: 3, two labels: "E MALAYSIA: Sarawak \ Gn. Penrissen, 1000m \ 23.V.1994, edge prim. \ montane for., # 9a \ Löbl & Burckhardt" [white, printed]; " CEPHENNULA \ penrissenana m. \ det. P. Jałoszyński, 2011 \ HOLOTYPUS " [red, printed] ( MHNG).

Diagnosis. Body between 0.7 and 0.8 mm in length; antennal club strongly flattened and compact; head covered with moderately large and unevenly distributed punctures, those on vertex and sides of frons dense, punctures on median part of frons distinctly sparser; median part of pronotum with small and dense punctures; sublateral pronotal carinae obliterated in anterior 1/5 of pronotum; subhumeral carinae distinct, as long as 1/ 3x EL and much longer than rudimentary humeral carinae; aedeagus in ventral view drop-shaped, with broad, nearly subrectangular apex and nearly straight apical margin; endophallus with three pairs of strongly curved elongate sclerites.

Description. Body of male ( Fig. 6 ) strongly convex, elongate, with shallow but distinct constriction between pronotum and elytra, moderately glossy, light brown, covered with yellowish vestiture, legs and antennae slightly lighter. BL 0.74 mm.

Head broadest at large, coarsely faceted and strongly convex eyes, HL 0.08 mm, HW 0.18 mm; vertex and frontoclypeal region convex; supraantennal tubercles barely marked. Punctures on dorsum of head unevenly distributed, moderately large and deep, on vertex and sides of frons dense, median part of frons with sparser punctures, separated by spaces 1.5– 2 x wider than puncture diameter, punctures on clypeus separated by spaces as wide as puncture diameter; setae very short and sparse, nearly recumbent. Antennae with strongly enlarged, strongly flattened and compactly assembled antennomeres X–XI and moderately enlarged antennomere IX, so that club appears two-segmented, AnL 0.25 mm; antennomere I about 1.3x as long as broad; II 2x as long as broad; III as long as broad; IV–VII subequal in length and width, each about 1.2x as long as broad; VII as broad as VII but distinctly shorter, minimally broader than long; IX only slightly longer and much broader than VIII, strongly transverse; X much longer and broader than IX, distinctly transverse; XI slightly narrower than X, 1.5x as long as broad.

Pronotum approximately semielliptical, broadest between middle and anterior 1/3; PL 0.24 mm, PW 0.33 mm, anterior margin weakly rounded; lateral margins distinctly microserrate, strongly rounded in anterior 1/3, nearly straight in posterior 1/3 and distinctly convergent towards sharp and acute hind angles; posterior margin very weakly bisinuate; sublateral carinae fine but distinct, obliterated in anterior 1/5 of PL. Transverse ante-basal groove very shallow and indistinct, slightly biarcuate; sublateral ante-basal foveae small and shallow; lateral ante-basal foveae slightly larger but also shallow. Punctures on median part of pronotal disc slightly smaller than those on head but deep and dense, punctures between sublateral pronotal carinae and lateral margins of pronotum distinctly larger and denser than those in middle, nearly adjacent to each other but not coarse; setae sparse, very short, nearly recumbent.

Elytra strongly convex, oval, broadest between middle and anterior 1/3; EL 0.43 mm, EW 0.34 mm, EI 1.26; base of each elytron with rudimentary basal fovea located much closer to scutellum than to base of humeral carina; subhumeral carinae distinct, about as long as 1/ 3x EL; humeral carinae rudimentary, shorter than 1/ 7x EL. Punctures on elytra much smaller than those on head and pronotum, fine and shallow but distinct and dense; setae similar as those on pronotum.

Legs moderately long and slender; pro- and mesotibiae nearly straight, metatibiae slightly curved.

Aedeagus (Figs. 19, 20) in ventral view drop-shaped with relatively broad, subrectangular apex and nearly straight apical margin; AeL 0.18 mm. Endophallus darkly sclerotized, with three pairs of elongate sclerites—very short median pair curved ventrally, very long sublateral pair strongly curved laterally and very short lateral pair strongly curved laterally; parameres slender, nearly reaching apex of median lobe, each bearing single apical seta.

Female. Unknown.

Distribution. East Malaysia (Borneo: Sarawak).

Etymology. Locotypical, after Mount Penrissen in Borneo.

Figures

FIGURES 3 – 7. Habitus of males. 3 ― Cephennula densepunctata sp. n.; 4 ― Cephennula gemina sp. n.; 5 ― Cephennula minutissima sp. n.; 6 ― Cephennula penrissenana sp. n.; 7 ― Cephennula poringana sp. n. Scale bars: 0.2 mm.