Revision of Cephennomicrus of Australia (Coleoptera, Staphylinidae, Scydmaeninae) Author Jałoszyński, Paweł text Zootaxa 2018 4422 2 151 183 journal article 29149 10.11646/zootaxa.4422.2.1 a10328ef-c215-4567-aa60-ff1ac514d175 1175-5326 1455555 70F972E5-D1B8-4A18-9BEB-8C7345C30AD0 Cephennomicrus perthi (Franz) ( Figs 7–12 , 120 , 123 ) Neseuthia perthi Franz, 1975 : 133 , fig. 113. Cephennomicrus perthi (Franz) ; Jałoszyński, 2008: 34. Type material. Holotype : AUSTRALIA ( WESTERN AUSTRALIA ): ♂ , six labels: "Umg. Perth / SW- Australien / lg.H.Franz" [white, printed], " Neseuthia / perthi m. / det.H.Franz" [white, handwritten and printed], " Typus " [red, handwritten], " CEPHENNOMICRUS / perthi / ( Franz, 1975 ) / det. P. Jałoszyński, '18" [white, printed] ( SAM ). Emended diagnosis. BL 0.95 mm ; body stout, EI 1.21; all antennomeres elongate; antennal club trimerous and indistinctly delimited; inner pair of pronotal antebasal pits connected by a distinct shallow groove; frons in males modified, with a narrow transverse asetose median area demarcated only laterally by a pair of subtriangular elevations; aedeagus stout, with distal portion of flagellum coiled. Redescription. Body of male ( Fig. 7 ) relatively stout and strongly convex, uniformly reddish brown; setae on head, pronotum and elytra very short and recumbent but discernible at magnification 40 ×. BL 0.95 mm . Head ( Fig. 8 ) broadest at large, strongly convex and coarsely faceted eyes, HL 0.08 mm , HW 0.24 mm ; vertex weakly convex; frons modified, with a narrow transverse median impression devoid of setae, delimited only laterally by a pair of subtriangular elevations; supraantennal tubercles weakly elevated. Punctures on head dorsum fine, inconspicuous. Antennae slender, with indistinctly delimited trimerous club, AnL 0.48 mm , all antennomeres elongate (IX and X indistinctly), antennomere XI about as long as IX and X combined, about twice as long as broad. FIGURES 1–12. Cephennomicrus inconspicuus (King) (1–6) and C. perthi (Franz) (7–12). Dorsal habitus (1, 7); head of male in dorsal view (2, 8); aedeagus in ventral (3, 5, 9, 11) and lateral (4, 6, 10, 12) views. Pronotum subtrapezoidal, broadest near anterior fourth; PL 0.30 mm , PW 0.38 mm ; anterior and posterior margins nearly straight, sides rounded in anterior third and nearly straight in posterior half; anterior corners broadly rounded, posterior corners strongly obtuse-angled and blunt; base with two lateral pairs of small but distinct pits, inner pair connected by a shallow transverse groove; lateral pronotal carinae not serrate. Punctures on pronotal disc dense but superficial, diffuse and inconspicuous. Elytra oval, broadest slightly anterior to middle; EL 0.58 mm , EW 0.48 mm , EI 1.21; humeral calli distinct; apices separately rounded. Punctures on elytra similar to those on pronotum. Legs moderately long and slender, unmodified. Aedeagus ( Figs 9–12 ) stout; AeL 0.15 mm ; median lobe in ventral view with stout proximal capsular part and much shorter, sharply delimited subtrapezoidal distal part, its apical margin slightly concave; diaphragm distinct, circular, sub-medially on ventral wall; flagellum with several coils in subapical region; each paramere with one long apical seta. Female. Unknown. Distribution ( Fig. 123 ). Western Australia . Remarks. Among species of the C. inconspicuus group, C. perthi can be easily distinguished on the basis of the frons modification in males, which is similar to that in C. inconspicuus , but the impressed median area is distinctly narrower; and the unique, remarkably stout aedeagus.