Cephennomicrus marunensis, Jałoszyński, 2018

Jałoszyński, Paweł, 2018, Revision of Cephennomicrus of Australia (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 4422 (2), pp. 151-183: 168-170

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Cephennomicrus marunensis

sp. n.

Cephennomicrus marunensis   sp. n.

( Figs 69–73 View FIGURES 64–73 , 123 View FIGURE 123 )

Type material. Holotype: AUSTRALIA (WESTERN AUSTRALIA): ♂, three labels: " 15.00S 125.21E WA / "Marun" CALM Site / 8/4 Prince Frederiock / Harbour Jan. 1989 / N.McKenzie" [white, printed], "Berlesate/ ANIC 1275 / closed forest / litter" [white, printed], " CEPHENNOMICRUS   / marunensis   m. / P. Jałoszyński, '18 / HOLOTYPUS " [red, printed] ( ANIC). Paratypes (2 exx.): 1 ♂, 1 ♀, same data as for holotype ( ANIC, cPJ).

Diagnosis. BL 0.70–0.74 mm; body stout, EI 1.07–1.14; 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 simple, containing two lateral and one median bunches of needle-like sclerites, subapical region of dorsal wall with paired setae.

Description. Body of male ( Fig. 69 View FIGURES 64–73 ) stout, uniformly reddish brown; setae on head, pronotum and elytra very short, dense and recumbent but discernible at magnification 40 ×. BL 0.71–0.74 mm.

Head broadest at large, strongly convex and coarsely faceted eyes, HL 0.08 mm, HW 0.20 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 0.30–0.31 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 0.24 mm, PW 0.33 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 0.40–0.43 mm, EW 0.35–0.38 mm, EI 1.13–1.14; humeral calli distinct; apices separately rounded. Punctures similar to those on pronotal disc.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 70–73 View FIGURES 64–73 ) moderately elongate; AeL 0.15 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. Externally indistinguishable from male; BL 0.70 mm; HL 0.08 mm, HW 0.20 mm, AnL 0.28 mm; PL 0.25 mm, PW 0.33 mm; EL 0.38 mm, EW 0.35 mm, EI 1.07.

Distribution ( Fig. 123 View FIGURE 123 ). Western Australia.

Etymology. Locotypical, after the locality name Marun in Prince Frederick Harbour.

Remarks. Examination of the aedeagus is necessary to identify this species; the drop-shaped median lobe, one pair of lateral bunches of needle-like sclerites flanking a median bunch of similar sclerites are unique for C. marunensis   .


Australian National Insect Collection