Leascydmus armstrongi Jałoszyński, 2014, sp. n.
Creators: name: Jałoszyński, Paweł
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Leascydmus
Leascydmus armstrongi

description: Leascydmus armstrongi sp. n.
(Figs. 37–45, 48, 51–52, 55–56, 194 b)
Type material studied. Holotype: AUSTRALIA: ♂: two labels: "Megalong / N. S. Wales / J. Armstrong" [white, printed and handwritten], " LEASCYDMUS / armstrongi m. / det. P. Jałoszyński, 2014 / HOLOTYPUS " [red, printed] (ANIC). Paratypes: 2 ♂♂, 4 ♀♀, same data as for holotype, all with yellow " paratypus " labels (ANIC, cPJ).
Diagnosis. Male and female: body uniformly brown, only tarsi lighter. Male: aedeagus in lateral view with apex slightly curved ventrally.
Description. Body of male (Fig. 48) strongly convex, elongate and slender, with long appendages, BL 2.35–2.48 mm (mean 2.43 mm); cuticle glossy, body brown, tarsi lighter, yellowish-brown, vestiture yellowish.
Head (Figs. 37–38, 48) broadest at eyes, HL 0.43 mm, HW 0.48–0.50 mm (mean 0.49 mm); tempora longer than eyes, strongly curved posteromesally; vertex and frons confluent and evenly convex. Eyes small and weakly projecting laterally from the head silhouette, finely faceted. Punctures on head dorsum fine and sparse, separated by spaces 1.5– 2 x as wide as diameters of punctures; setae short, sparse and suberect. Antennae (Fig. 48) slender, AnL 1.83–1.85 mm (mean 1.84 mm); all antennomeres elongate, antennomere XI as long as IX–X together.
Pronotum (Figs. 42, 48) in dorsal view approximately subquadrate with rounded sides, broadest near anterior third, PL 0.58–0.60 mm (mean 0.58 mm), PW 0.55 mm; anterior margin nearly straight; anterior corners obtuse and blunt; lateral margins rounded; posterior corners strongly obtuse and indistinctly marked; posterior margin nearly straight; pronotal base with shallow and indistinct transverse impression. Punctures on pronotal disc similar to those on frons and vertex; setae sparse, short and suberect, near posterior corners distinctly denser and thicker.
Elytra (Figs. 44, 48) oval, more convex than pronotum, broadest slightly anterior to middle, EL 1.35–1.45 mm (mean 1.42 mm), EW 0.83–0.98 mm (mean 0.91 mm), EI 1.49–1.64; basal impressions absent; humeral denticles tiny but distinct; elytral apices separately rounded. Punctures on elytral disc fine but slightly more distinct than those on pronotum, separated by spaces 2– 3 x as wide as diameters of punctures; setae short, sparse and erect. Hind wings well developed, about twice as long as elytra.
Legs (Fig. 48) long and slender, without modifications; all tibiae broadest in proximal half.
Aedeagus (Figs. 51–52, 55–56) elongate, darkly sclerotized, AeL 0.73 mm, in ventral view apex of ventral wall subtrapezoidal and apex of dorsal wall rapidly narrowing; internal armature composed of a complicated set of elongate sclerites; parameres slender, with moderately long apical and subapical setae.
Female. Similar to male; BL 2.20–2.40 mm (mean 2.30 mm); HL 0.40–0.43 mm (mean 0.42 mm), HW 0.48–0.50 mm (mean 0.49 mm), AnL 1.63–1.78 mm (mean 1.68 mm); PL 0.53–0.55 mm (mean 0.53 mm), PW 0.53–0.55 mm (mean 0.54 mm); EL 1.25–1.43 mm (mean 1.35 mm), EW 0.93–1.03 mm (mean 0.98 mm), EI 1.22–1.49.
Distribution (Fig. 194 b). South-eastern Australia (Blue Mountains in New South Wales).
Etymology. Leascydmus armstrongi is dedicated to J. W. T. Armstrong, who described many Australian beetle taxa and collected the type series of this species.
Remarks. This species is highly similar to L. simplicicornis in the body shape, proportions of body parts, and even in the aedeagus. The striking difference in pigmentation, smaller body and the antennae distinctly longer in relation to body allow for unambiguous discrimination from L. simplicicornis.
description: Published as part of Jałoszyński, Paweł, 2014, ' The curse of Horaeomorphus ': taxonomy of misplaced Australian Cyrtoscydmini (Coleoptera: Staphylinidae: Scydmaeninae), pp. 1-76 in Zootaxa 3828 (1) on pages 24-25, DOI: 10.11646/zootaxa.3828.1.1, http://zenodo.org/record/286513