Cephennomicrus perthi (Franz)

Jałoszyński, Paweł, 2018, Revision of Cephennomicrus of Australia (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 4422 (2), pp. 151-183 : 154-156

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.

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.

Figures

FIGURE 123. Distribution of Cephennomicrus in Australia; white circles denote nominal species, solid black circles denote undescribed species known from females only (distribution of undescribed species known from the same localities as nominal ones is omitted).

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.

FIGURES 118–122. Historical labels of type specimens. Cephennomicrus inconspicuus (King), lectotype (118) and paralectotype (119); C. perthi (Franz), holotype (120); C. lordhowei (Franz), holotype (121) and paratype (122).