Amaurodera parvoculata, Assing, 2016

Assing, Volker, 2016, On some Lomechusini of the Palaearctic and Oriental regions (Coleoptera: Staphylinidae: Aleocharinae), Beiträge Zur Entomologie = Contributions to Entomology 66 (1), pp. 13-111 : 86-87

Amaurodera parvoculata spec. nov.

( Figs 131, 136 , 400–404 )

Type material: Holotype ♂: “ Thailand: Chiang Mai, Doi Inthanon , 1650 m, 7.XI.1985, Burckhardt-Löbl / Holotypus ♂ Amaurodera parvoculata sp. n., det. V. Assing 2015” ( MHNG).

Paratypes: 15 exs.: same data as holotype ( MHNG, cAss) ; 1 ♀: “ Thailand [2] – Doi Inthanon , Huay Saai Leung waterfall, 18°31'N, 98°27'E, 1010 m, 19.XII.2013, leg. Ob ” (cAss) .

Etymology: The specific epithet (adjective) is composed of the Latin adjectives parvus (small) and oculata (with eyes) and alludes to the relatively small eyes, one of the characters distinguishing this species from the similar A. dentata and the sympatric A. thailandensis .

Description: Body length 4.5–4.8 mm; length of forebody 2.1–2.3 mm. Coloration: forebody reddish to dark-brown; abdomen: tergites III–IV pale-reddish, tergite V reddish, with the posterior two-thirds dark-red to dark-brown, tergites VI–VIII dark-brown with the posterior margins of tergites VII and VIII reddish; legs dark-yellowish, with the profemora dark-yellowish to pale-brown and the apical halves of the meso- and metafemora slightly darker, dark-yellowish to pale-brown; antennae reddish to reddish-brown; maxillary palpi brown, with palpomere IV pale-yellowish.

Head ( Fig. 131 ) approximately 1.1 times as long as broad, broadest across eyes, with sexual dimorphism; punctation sparse and extremely fine; interstices without microreticulation. Eyes of relatively small size, approximately half as long as distance from posterior margin of eye to posterior constriction of head. Antenna ( Fig. 136 ) 2.7–2.8 mm long and very slender.

Pronotum ( Fig. 131 ) 0.88–0.94 mm long, approximately 1.45 times as long as broad, and slightly broader than head; with two erect lateral setae on either side anteriorly; dorsal and lateral surface not meeting at an angle posteriorly; microreticulation reaching lateral carinae only in posterior half; narrow median furrow long, but reaching neither anterior nor posterior margins.

Elytra ( Fig. 131 ) 0.51–0.53 times as long as pronotum; punctation moderately fine and moderately dense; interstices with nearly obsolete microreticulation barely visible even at high magnification (100 x); pubescence moderately short and depressed. Hind wings present. Metatarsomere I slightly longer than the combined length of II and III.

Abdomen narrower than elytra; punctation fine and sparse on anterior, even sparser on posterior tergites; interstices with microsculpture composed of transverse meshes; posterior margin of tergite VII with palisade fringe; posterior margin of tergite VIII distinctly serrate.

♂: head with shallow, but extensive median impression; median lobe of aedeagus ( Figs 400–402 ) 0.70–0.73 mm long; ventral process with median carina and distinctly angular in the middle (lateral view); crista apicalis pronounced.

♀: head without dorsal impression; spermathecal capsule ( Figs 403–404 ) 0.28–0.30 mm long, with moderately dilated distal portion and short proximal portion.

Comparative notes: Regarding its coloration and primary sexual characters, A. parvoculata is similar to A. dentata , from which it is readily distinguished by much smaller eyes, significantly longer antennae, the paler abdominal tergite V, a longer and more oblong pronotum, shorter elytra, the smaller median lobe of the aedeagus with a shorter crista apicalis, a ventral process with a shorter apical portion (lateral view), and by the less dilated distal portion of the spermathecal capsule.

Distribution and natural history: The specimens were collected in two localities in Doi Inthanon, North Thailand, at altitudes of 1010 and 1650 m, in one locality together with A. fasciata .

Figures

Figs 119–143. Drusilla bifida (119–122), Rabdotodrusilla pectinata (123–125), Amaurodera arunica (126–127, 132), A. gilvios (128, 133), A. reticulata (129, 134), A. dentata (130, 135), A. parvoculata (131, 136), A. thailandensis (137–138), A. fasciata (139), A. meorum(140),A. disparicollis (141), A. spinans (142),andA. varicollis(143):forebody (119, 123, 126, 128–131); head and pronotum (120); antenna (121, 124, 132–143); abdomen (122, 125, 127). Scale bars: 1.0 mm.

Figs 396–419. Amaurodera dentata (396–399), A. parvoculata (400–404), A. thailandensis (405–410), A. fasciata (411–414), and A. meorum (415–419: 415–416, 419:Khao Yai Nat.Park):median lobe of aedeagus in lateral and in ventral view (396–397, 400–402, 405–409, 411–412, 415–418); spermatheca (398–399, 403–404, 410, 413–414, 419). Scale bars: 0.2 mm.