Cephennomicrus baroalbanus, Jałoszyński, 2018

Jałoszyński, Paweł, 2018, Revision of Cephennomicrus of Australia (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 4422 (2), pp. 151-183 : 170-171

Cephennomicrus baroalbanus sp. n.

( Figs 74–78 , 123 )

Type material. Holotype: AUSTRALIA (NORTHERN TERRITORY): ♂, three labels: " 12.50S 132.52E NT / Baroalba Ck.Gorge / 19km Ex N Mt.Cahill / 16 Nov. 1972 / R.W. Taylor" [white, printed], "Berlesate/ ANIC 446 / rainforest" [white, printed], " CEPHENNOMICRUS / baroalbanus m. / P. Jałoszyński, '18 / HOLOTYPUS " [red, printed] ( ANIC).

Diagnosis. BL 0.80 mm; body stout, EI 1.09; 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 and vertex in males unmodified; aedeagus moderately elongate, in ventral view median lobe drop-shaped, endophallus complicated, containing four lateral bunches of needle-like sclerites connected at middle, subapical region of dorsal wall with paired setae.

Description. Body of male ( Fig. 69 ) stout, uniformly reddish brown; setae on head, pronotum and elytra extremely short, dense and recumbent, barely discernible at magnification 80 ×. BL 0.80 mm.

Head broadest at large, strongly convex and coarsely faceted eyes, HL 0.08 mm, HW 0.23 mm; vertex and frons unmodified, confluent, weakly and evenly convex; supraantennal tubercles weakly elevated. Punctures fine and inconspicuous. Antennae short, with sharply delimited dimerous and strongly flattened club, AnL 0.33 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 0.36 mm; anterior margin arcuate, posterior margin nearly straight, anterior corners broadly rounded, sides strongly rounded in anterior third and nearly straight 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 indistinctly serrate. Punctures on pronotal disc fine, inconspicuous.

Elytra oval, broadest distinctly anterior to middle; EL 0.48 mm, EW 0.44 mm, EI 1.09; humeral calli distinct; apices separately rounded. Punctures similar to those on pronotal disc.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 75–78 ) stout; AeL 0.20 mm; median lobe in ventral view drop-shaped, endophallus moderately complicated, with four large and fused lateral bunches of long, needle-like 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 ). Northern Territory.

Etymology. Locotypical, after Baroalba Creek.

Remarks. Examination of the aedeagus is necessary to identify this species; the drop-shaped median lobe and two pairs of lateral bunches of needle-like sclerites connected at middle are unique for C. baroalbanus .

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 74–78. Cephennomicrus baroalbanus sp. n.. Dorsal habitus (74); aedeagus in ventral (75, 77) and lateral (76, 78) views.

FIGURES 64–73. Cephennomicrus indistinctus sp. n. (64–68) and C. marunensis sp. n. (69–73). Dorsal habitus (64, 69); aedeagus in ventral (65, 67, 70, 72) and lateral (66, 68, 71, 73) views.