Plateros macrolycoides Kazantsev, 2021

Kazantsev, S. V., 2021, A review of Plateros Bourgeois, 1879 of Indochina (Coleoptera: Lycidae), Russian Entomological Journal 30 (1), pp. 47-73 : 63

Plateros macrolycoides Kazantsev , sp.n.

Figs 60, 137–138.

MATERIAL: Holotype, ♂, NE Laos, Hua Phan prov., Ban Saleui, Phou Pan Mt. , ~ 20°12´N, 104°01´E, 1300–1900 m, 1– 31.05.2011, C. Holzschuh leg. ( ICM); paratypes, 10 ♂♂ and 7 ♀♀, same label ( ICM and ZIN).

DESCRIPTION. Male. Dark brown to black; pronotum, scutellum and elytra orange ( Fig. 60).

Vertex with shallow round impression behind antennal prominence and two minute deep round excavations at its bottom. Eyes moderately large, interocular distance ca. 1.1 times shorter than eye diameter. Labrum small, transverse, convex anteriorly. Palps slender; ultimate palpomeres noticeably longer than wide, sub-oval, obliquely convex and flattened at apex. Antennal sockets separated by minute lamina. Antennae attaining to elytral two thirds, feebly dentate; antennomere 3 ca. 3 times longer than antennomere 2 and ca. 1.6 times shorter than antennomere 4; antennomeres 3–11 with short sub-erect pubescence ( Fig. 60).

Pronotum transverse, ca. 1.6 times wider than long, trapezoidal, distinctly bisinuate basally and noticeably semi-circularly produced anteriorly, with prominent acute posteri- or and noticeable blunt anterior angles. Scutellum transverse, parallel-sided, triangularly incised at apex ( Fig. 60).

Elytra long, ca. 3.4 times longer than wide at humeri, noticeably widened distally; with four prominent, almost equally developed primary costae, noticeably stouter than secondary ones; interstices with even rows of regular subquadrate cells; pubescence relatively scarce, short and decumbent ( Fig. 60).

Legs slender; femoris and tibiae narrow, subequal in length ( Fig. 60).

Aedeagus asymmetrical, with narrow phallobase and approximate, but not contiguous phallobasal lateral plates; median lobe robust, slightly twisted and considerably widened in distal half ( Figs 137–138).

Female. Similar to male, but eyes somewhat smaller and antennae less dentate.

Length: 9.0– 9.5 mm. Width (humerally): 2.1–2.3 mm.

ETYMOLOGY. The name of the new species is derived from the genus name Macrolycus , alluding to its similarity to the mentioned genus.

DIAGNOSIS. Plateros macrolycoides sp.n. may be distinguished from the somewhat resembling it in the shape of the aedeagus P. korshunovi by the more robust and straight, with less curved and more widened distally median lobe ( Figs 137–138), as well as by the totally different habitus and coloration ( Fig. 60).

DISTRIBUTION. North-eastern Laos.