Amaurodera reticulata spec. nov.

(Figs 123, 134, 391–394)

Type material: Holotype ♂: “ Thailand: NE Bangkok, Khao Yai Nat. Park, 750–850 m, 26.XI.–3.XII.85, Burckhardt-Löbl / Holotypus ♂ Amaurodera reticulata sp. n., det. V. Assing 2015” (MHNG).

Paratype ♂: same data as holotype (cAss) .

Etymology: The specific epithet (Latin, adjective) alludes to the distinct microreticulation of the elytra, one of the characters distinguishing this species from other congeners known from Thailand.

Description: Body length 4.2–4.3 mm; length of forebody 2.0– 2.1 mm. Coloration: forebody dark-reddish; abdomen: tergites III–IV pale-reddish, tergites V–VIII dark-brown with the posterior margins and the anterior margin of tergite V reddish; legs yellowish with the apical halves of the metafemora slightly darker; antennae dark-yellowish to yellowish-brown; maxillary palpi yellowish.

Head (Fig. 123) as long as broad, broadest across eyes, with sexual dimorphism; punctation sparse and extremely fine; interstices with nearly obsolete microreticulation, traces of which are visible only at high magnification (100 x). Eyes moderately large and bulging, approximately 0.8 times as long as distance from posterior margin of eye to posterior constriction of head. Antenna (Fig. 134) 2.3 mm long and very slender; antennomere IX approximately twice as long as broad.

Pronotum (Fig. 123) 0.78–0.80 mm long, approximately 1.4 times as long as broad, and slightly narrower than head; 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. 123) 0.57–0.58 times as long as pronotum; punctation fine and rather dense; interstices with distinct microreticulation; pubescence short and depressed. Hind wings present. Metatarsomere I approximately as long as the combined length of II and III.

Abdomen narrower than elytra; punctation fine and rather sparse on anterior, even sparser on posterior tergites; tergites III–VI with distinct microsculpture composed of transverse meshes, tergite VII with practically obsolete microreticulation (traces may be visible at high magnification); 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 391–394) 0.53–0.55 mm long and of distinctive shape; ventral process ventromedially with a pair of lateral angular projections; crista apicalis pronounced.

♀: unknown.

Comparative notes: Among the species with uniformly reddish abdominal tergites III–IV and a sexual dimorphism of the head, A. reticulata is characterized by the distinct microreticulation of the elytra and the abdominal tergites III–VI, nearly uniformly yellowish legs, and a rather small aedeagus with a bidentate ventral process.

Distribution and natural history: Khao Yai National Park is situated some 100 km to the northeast of Bangkok in central Thailand. The specimens were collected at an altitude of 750–850 m, together with A. meorum .