Cephennomicrus mossmanensis, Jałoszyński, 2018

Jałoszyński, Paweł, 2018, Revision of Cephennomicrus of Australia (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 4422 (2), pp. 151-183 : 177-178

Cephennomicrus mossmanensis sp. n.

( Figs 108–112 , 123 )

Type material. Holotype: AUSTRALIA (QUEENSLAND): ♂, two labels: "Mossman Bluff Track, / 5-10km W Mossman, N.Qld. / 20 Dec 1989 – 15 Jan 1990 / Monteith,Thompson& ANZES / Site 2, 360m, flt. intercept" [white, printed], " CEPHENNOMICRUS / mossmanensis m. / P. Jałoszyński, '18 / HOLOTYPUS " [red, printed] (QM).

Diagnosis. BL 0.70 mm; body moderately stout, EI 1.23; antennomeres III–IX each about as long as broad, X transverse; antennal club dimerous and sharply delimited; inner pair of pronotal antebasal pits not connected, frons and vertex in males unmodified; aedeagus stout, subtriangular, with a simple (uncoiled) flagellum, lacking any darkly sclerotized structures.

Description. Body of male ( Fig. 108 ) moderately stout and strongly convex, uniformly reddish brown; setae on head, pronotum and elytra very short, dense and recumbent, discernible at magnification 80 ×. BL 0.70 mm.

Head broadest at large, strongly convex and coarsely faceted eyes, HL 0.08 mm, HW 0.20 mm; frons and vertex in males unmodified, confluent, weakly and evenly convex; supraantennal tubercles weakly elevated. Punctures fine and inconspicuous. Antennae short, with sharply delimited dimerous club, AnL 0.29 mm, antennomeres I–II distinctly elongate, III–IX each about as long as broad, X distinctly transverse, XI about as long as broad.

Pronotum subtrapezoidal, broadest near anterior fourth; PL 0.23 mm, PW 0.28 mm; anterior and posterior margins weakly arcuate, anterior corners broadly rounded, sides strongly rounded in anterior third and indistinctly concave in posterior half, posterior corners distinctly obtuse-angled; 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 0.40 mm, EW 0.33 mm, EI 1.23; humeral calli distinct; apices separately rounded. Punctures similar to those on pronotal disc.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 109–112 ) moderately elongate; AeL 0.10 mm; median lobe in ventral view drop-shaped, endophallus weakly sclerotized and simple, with nearly straight flagellum rapidly broadened proximally and without any elongate sclerites; each paramere with three apical setae of which one is distinctly shorter.

Female. Unknown.

Distribution ( Fig. 123 ). Queensland.

Etymology. Locotypical, after Mossman town.

Remarks. This unremarkable species can be identified only on the basis of its uniquely shaped aedeagus with the endophallus lacking any darkly sclerotized structures and with a simple flagellum.

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 103–112. Cephennomicrus lordhowei (Franz) (103–107) and C. mossmanensis sp. n. (108–112). Dorsal habitus (103, 108); aedeagus in ventral (104, 106, 109, 111) and lateral (105, 107, 110, 112) views.