Cephennomicrus wunundarranus, Jałoszyński, 2018

Jałoszyński, Paweł, 2018, Revision of Cephennomicrus of Australia (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 4422 (2), pp. 151-183 : 165-166

Cephennomicrus wunundarranus sp. n.

( Figs 48–53 , 123 )

Type material. Holotype: AUSTRALIA (WESTERN AUSTRALIA): ♂, three labels: " 15.04S 125.11E WA / CALM Site 12/1 / Boongaree Is. / Jan. 1989 / N.McKenzie" [white, printed], "Berlesate / ANIC 1282 / closed forest / litter" [white, printed], " CEPHENNOMICRUS / wunundarranus m. / P. Jałoszyński, '18 / HOLOTYPUS " [red, printed] ( ANIC). Paratype: 1 ♂, same data as for holotype ( ANIC).

Diagnosis. BL 0.75 mm; body stout, EI 1.13; antennomeres III–IX each as long as broad; antennal club dimerous, sharply delimited and strongly flattened; inner pair of pronotal antebasal pits not connected; frons in males modified, with a small round posteromedian tubercle; aedeagus stout, drop-shaped, with relatively simple endophallus containing median and lateral bunches of needle-like sclerites, subapical region of dorsal wall with paired setae.

Description. Body of male ( Fig. 42 ) stout, uniformly light brown; setae on head, pronotum and elytra very short, dense and recumbent, discernible at magnification 80 ×. BL 0.75 mm.

Head ( Fig. 49 ) broadest at large, strongly convex and coarsely faceted eyes, HL 0.08 mm, HW 0.18 mm; vertex weakly convex, frons modified, with a small posteromedian tubercle; supraantennal tubercles weakly elevated. Punctures fine and inconspicuous. Antennae short, with sharply delimited dimerous and strongly flattened club, AnL 0.30 mm, antennomeres I–II distinctly elongate, III–IX each as long as broad, X distinctly transverse, XI about as long as broad.

Pronotum subtrapezoidal, broadest near anterior fourth; PL 0.25 mm, PW 0.33 mm anterior margin arcuate, posterior margin nearly straight, anterior corners broadly rounded, sides strongly rounded in anterior third and weakly rounded in posterior half, posterior corners strongly obtuse-angled and blunt; base with two lateral pairs of small but distinct pits, transverse groove absent; lateral pronotal carinae distinctly serrate. Punctures on pronotal disc fine, inconspicuous.

Elytra oval, broadest distinctly anterior to middle; EL 0.43 mm, EW 0.38 mm, EI 1.13; humeral calli distinct; apices separately rounded. Punctures similar to those on pronotal disc.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 50–53 ) relatively stout; AeL 0.18 mm; median lobe in ventral view drop-shaped, endophallus moderately complicated, with two lateral bunches of long, needle-like sclerites flanking a median group of similar sclerites; dorsal wall with paired setae in subapical region; each paramere with two apical and one subapical setae of equal length.

Female. Unknown.

Distribution ( Fig. 123 ). Western Australia: Boongaree Island.

Etymology. Locotypical, after Wunundarra, the name of Boongaree Island used by the native Uunguu peoples.

Remarks. This is the only Australian species with a simple small and round tubercle on the posterior portion of frons in males; the tubercle, although small, is observable already at magnification 40 ×.

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 42–53. Cephennomicrus mediorugosus sp. n. (42–47) and C. wunundarranus sp. n. (48–53). Dorsal habitus (42, 48); head of male in dorsal view (43, 49); aedeagus in ventral (44, 46, 50, 52) and lateral (45, 47, 51, 53) views.