Euconnus (Napochus) microlaminatus, Jałoszyński, Paweł, 2015

Jałoszyński, Paweł, 2015, Taxonomy of ' Euconnus complex'. Part III. Morphology of Euconnus subgenus Napochus and revision of the Australian species (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 3925 (1), pp. 1-24 : 17-18

Euconnus (Napochus) microlaminatus sp. n.

( Figs. 30 , 45–46, 62)

Type material studied. Holotype: AUSTRALIA (Queensland): ♂, four 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], "ex dead / Pandanus / leaves" [white, printed], " ANIC / specimen" [green, printed], " Euconnus / ( Napochus ) / microlaminatus m. / det. P. JAŁOSZYŃSKI, '15" [red, printed] ( ANIC). Paratypes (2 ♂♂): same data as for holotype except one with additional label " ANIC 1124 / F.I.T. with trough / closed forest" and the other one with "ex / light / trap" [both white, printed] (paratypes in ANIC and cPJ).

Diagnosis. Small species, BL 1.05–1.10 mm; aedeagus in ventral view with very small and narrow ventral apical projection gradually broadening from base to subapical region and rounded at apex, not reaching apex of dorsal apical projection, internal lateral projections slender, much shorter than ventral apical projection and convergent but with externally curved apices; external lateral projections barely discernible; in lateral view ventral apical projection not curved, while dorsal apical projection strongly curved dorsally; parameres not expanded at apices.

Description. Body of male ( Fig. 30 ) strongly convex but with distinctly flattened elytral dorsum, elongate, with long appendages, BL 1.05–1.10 mm (mean 1.08 mm); glossy, uniformly light brown; vestiture slightly lighter than cuticle.

Head rhomboidal, broadest at eyes, HL 0.20 mm, HW 0.25 mm; vertex and frons confluent, convex; supraantennal tubercles feebly marked; eyes large, strongly convex and coarsely faceted. Punctures on vertex and frons fine and inconspicuous; setae long, dense, suberect to erect, additionally tempora and vertex with long and dense bristles directed posteriorly. Antennae short, AnL 0.48–0.50 mm (mean 0.48 mm); antennomeres I–II only slightly elongate, III–VII slightly transverse and VIII–X strongly transverse, antennomere XI about as long as wide.

Pronotum in dorsal view subtrapezoidal, broadest at base and strongly narrowing anteriorly, PL 0.25–0.28 mm (mean 0.27 mm), PW 0.28–0.30 mm (mean 0.28 mm); antebasal pits barely discernible, transverse groove distinct. Punctures on pronotal disc fine and inconspicuous; setae fine and on sides obscured by dense, long and thick bristles.

Elytra suboval and slightly flattened or even slightly impressed along suture near anterior third, broadest near middle, EL 0.60–0.63 mm (mean 0.62 mm), EW 48 mm, EI 1.26–1.32; basal impressions shallow but distinct, humeri elongate; apices separately rounded. Punctures on elytral disc distinct, especially on adsutural impressed area, but small and shallow; setae long, sparse and strongly erect. Hind wings well-developed, twice as long as elytra.

Legs long and slender; unmodified.

Aedeagus (Figs. 45–46) very stout, AeL 0.13 mm, in ventral view with abruptly delimited and short apical part; ventral apical projection elongate and narrow at base, gradually broadening to subapical region and with round apex, in ventral view not reaching apex of dorsal apical projection; only dorsal apical projection curved dorsally; internal and external lateral projections similar in shape, subtriangular with hook-shaped and divergent apices. Parameres broad, in lateral view apical parts not broadened, each with 2–3 long apical and subapical setae and with 1–2 short and thin subapical setae.

Female. Unknown or indistinguishable from similar species (see discussion).

Distribution. N Queensland ( Fig. 62 ).

Etymology. The name microlaminatus refers to the very small ventral apical projection (or a plate, lamina) of the aedeagus.

Figures

FIGURES 24 – 34. Napochus of Australia; dorsal habitus (24 – 25, 28 – 34) and original labels of holotypes (26 – 27). Euconnus palmwoodianus (Franz) (24, 26), E. pisoniae Franz (25, 27), E. setiphallus sp. n. (28), E. yadhaigana sp. n. (29), E. microlaminatus sp. n. (30), E. feeneyi feeneyi sp. n. (31, 32), E. feeneyi parallelilaminatus ssp. n. (33, 34).

FIGURES 57 – 64. Distribution of Napochus in Australia. Euconnus palmwoodianus (Franz) (57, 58), E. pisoniae Franz (59), E. setiphallus sp. n. (60), E. yadhaigana sp. n. (61), E. microlaminatus sp. n. (62), E. feeneyi feeneyi sp. n. (63), E. feeneyi parallelilaminatus ssp. n. (64).