Cephennomicrus complicatus, Jałoszyński, 2018

Jałoszyński, Paweł, 2018, Revision of Cephennomicrus of Australia (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 4422 (2), pp. 151-183 : 179-181

Cephennomicrus complicatus sp. n.

( Figs 113–117 , 123 )

Type material. Holotype: AUSTRALIA (QUEENSLAND): ♂, three labels: " 13.44S 143.20E QLD / 11km WbyN of Bald Hill / McIlwraith Range / 27 June- 12 July 1989 / T.A.Weir 520m / search party campsite" [white, printed], "Berlesate / ANIC 1113 / flood debris / closed forest" [white, printed], " CEPHENNOMICRUS / complicatus m. / P. Jałoszyński, '18 / HOLOTYPUS " [red, printed] ( ANIC).

Diagnosis. BL 0.70 mm; body slender, EI 1.31; antennomeres III–X each as long as broad; antennal club trimerous and indistinctly delimited; inner pair of pronotal antebasal pits connected by a distinct transverse groove, pronotal base with additional small median pit; frons in males unmodified; aedeagus moderately slender, with complex and darkly sclerotized endophallic structures composed of lateral sclerites directed distomesad.

Description. Body of male ( Fig. 113 ) slender and moderately convex, uniformly light brown; setae on head, pronotum and elytra very short, dense and recumbent, but discernible at magnification 40 ×. BL 0.70 mm.

Head broadest at large, strongly convex and coarsely faceted eyes, HL 0.08 mm, HW 0.18 mm; vertex and frons unmodified, confluent, evenly and weakly convex; supraantennal tubercles weakly elevated. Punctures fine and inconspicuous. Antennae slender, with indistinctly delimited trimerous club, AnL 0.33 mm, antennomeres I–II distinctly elongate, III–X each about as long as broad, XI about as long as IX and X combined, indistinctly shorter than broad.

Pronotum subtrapezoidal, broadest near anterior fourth; PL 0.20 mm, PW 0.24 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 weakly obtuse-angled; base with two lateral pairs of small but distinct pits, inner pair connected by a narrow, distinct transverse groove, additionally a small median pit is present; lateral pronotal carinae not serrate. Punctures on pronotal disc fine, inconspicuous.

Elytra oval, broadest distinctly anterior to middle; EL 0.43 mm, EW 0.33 mm, EI 1.31; humeral calli distinct; apices separately rounded. Punctures similar to those on pronotal disc.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 114–117 ) elongate; AeL 0.20 mm; median lobe in ventral view drop-shaped, endophallus complicated, with a large subapical bell-shaped structure composed of oblique sclerites in a form of a Christmas tree; flagellum best visible in lateral view ( Figs 115, 117 ), broad, strongly recurved, but not coiled; each paramere with one long and thickened apical, and two subapical setae of unequal length.

Female. Unknown.

Distribution ( Fig. 123 ). Queensland.

Etymology. The name complicatus refers to the complex endophallus. Remarks. This species has a slender body, unmodified head in males, an additional median antebasal pronotal pit and a transverse antebasal groove; this combination of characters is unique for C. complicatus .

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 113–117. Cephennomicrus complicatus sp. n.. Dorsal habitus (113); aedeagus in ventral (114, 116) and lateral (115, 117) views.