Plateros gerstmeieri Kazantsev, 2021

Kazantsev, S. V., 2021, A review of Plateros Bourgeois, 1879 of Indochina (Coleoptera: Lycidae), Russian Entomological Journal 30 (1), pp. 47-73 : 58

Plateros gerstmeieri Kazantsev , sp.n.

Figs 192–194 .

MATERIAL: Holotype, ♂, N Vietnam, Ninh Binh pr., Cuc Phuong N.P., lake Mac , 20°15´30´´N, 105°42´29´´E, 160 m, LFF, 6.V.2017, R. Gerstmeier leg. ( NME).

DESCRIPTION. Male. Light to dark brown; pronotum light brown with testaceous margins ( Fig. 192 ).

Vertex with broad shallow round impression behind antennal prominence and a pair of small approximate round pits at its bottom. Eyes large, interocular distance ca. 1.3 times shorter than eye diameter. Labrum small, transverse, concave anteriorly. Palps slender; ultimate palpomeres longer than wide, narrow and almost parallel-sided, obliquely convex and flattened at apex. Antennal sockets separated by minute lamina. Antennae relatively long, attaining to elytral three fifths, antennomeres 3–10 rather broad, strongly dentate; antennomere 3 ca. 2.4 times longer than antennomere 2 and ca. 1.1 times shorter than antennomere 4; antennomeres 3–11 with moderately long sub-erect pubescence ( Fig. 192 ).

Pronotum transverse, ca. 1.3 times wider than long, with noticeably concave sides and almost as wide at anterior angles as basally, slightly bisinuate basally and semi-circularly produced anteriorly, with short acute posterior and rounded blunt anterior angles. Scutellum transverse, parallel-sided, truncate at apex ( Fig. 192 ).

Elytra long, ca. 3.1 times longer than wide at humeri, almost parallel-sided; with four almost equally developed primary costae, not much stouter than secondary ones; interstices with even rows of small subquadrate cells; pubescence dense, short and decumbent, almost obscuring reticulation ( Fig. 192 ).

Legs slender; femoris and tibiae relatively broad, subequal in length ( Fig. 192 ).

Aedeagus asymmetrical, with narrow phallobase and absent sutures of phallobasal lateral plates; median lobe narrow, bent in distal half, constricted before and conspicuously widened at apex ( Figs 193–194 ).

Female. Unknown.

Length: 4.7 mm. Width (humerally): 1.2 mm.

ETYMOLOGY. The new species is named after Dr. Roland Gerstmeier (Munich) who collected the type specimen.

DIAGNOSIS. Plateros gerstmeieri sp.n. may be separated from P. planatus Waterhouse, 1879 , of similar coloration pattern and antennal structure, by the somewhat widening anteriorly pronotum with vestiges a median cell almost reaching anterior margin and noticeable transverse costae ( Fig. 192 ), as well as by the constricted before and conspicuously widened at apex median lobe of the aedeagus ( Figs 193–194 ).

DISTRIBUTION. Northern Vietnam, Cuc Phuong National Park.

Figures

Figs 189–194. General view and aedeagi of Plateros, ventrally and laterally, holotype males: 189–191 — P. bellipratensis sp.n.; 192– 194 — P. gerstmeieri sp.n. Scale: 0.5 mm. Рис. 189–194. ОбЩий вид и Эдеагусы Plateros, сниЗу и сбоку, голотипы, самцы: 189–191 — P. bellipratensis sp.n.; 192–194 — P. gerstmeieri sp.n. МасштабнаЯ линейка: 0,5 мм.