Plateros macroimpressus Kazantsev, 2021

Kazantsev, S. V., 2021, A review of Plateros Bourgeois, 1879 of Indochina (Coleoptera: Lycidae), Russian Entomological Journal 30 (1), pp. 47-73 : 61-63

Plateros macroimpressus Kazantsev , sp.n.

Figs 39 , 141–142 .

MATERIAL: Holotype, ♂, C Laos, Bolikhamsai, Ban Nape, Kaew Nua Pass , 500–700 m, 18°22.3´N 105°09.1´E, 4–12.V.1997, Strba & Hergovits leg. ( ICM); paratypes: ♀, same label; ♀, Thailand, Tham Than Lod N.P., 500 m, 500–700 m, 14°46´N 99°20´E, 5.IV.1989, Malicky & Wanleclag leg.; ♀, C Laos, Khammouan Pr., env. Nam Theun, Rte No. 8, 17°50.7´N, 105°03.2´E, 480–520 m, 2– 4.V.1998, M. Strba & R. Hergovits leg.; ♀, 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.; ♀, Thailand, Chomburi, Chan Ta Ten waterfall, 8.XII.2008, N. Vikhrev ( ICM) .

DESCRIPTION. Male. Dark brown to black; pronotum, scutellum and elytra orange testaceous ( Fig. 39 ).

Vertex with broad shallow impression behind antennal prominence and two minute distinct sub-oval excavations at its bottom. Eyes relatively small, interocular distance ca. 1.3 times greater than eye diameter. Labrum small, transverse, truncate anteriorly. Palps slender; ultimate palpomeres considerably longer than wide, narrow, almost parallel-sided, obliquely convex and flattened at apex. Antennal sockets separated by narrow lamina. Antennae attaining to elytral three fifths, antennomeres 3–10 flattened, dentate, distinctly narrowing distally; antennomere 3 ca. 4 times longer than antennomere 2 and ca. 1.1 times shorter than antennomere 4; antennomeres 3–11 with dense short sub-erect pubescence and much longer separate bristles ( Fig. 39 ).

Pronotum nearly subquadrate, only ca. 1.1 times wider than long, with parallel sides, moderately bisinuate basally and noticeably semi-circularly produced anteriorly, with swollen margins, short rounded posterior and blunt rounded anterior angles; disk with conspicuous elongate median and round lateral impressions. Scutellum subquadrate, parallel-sided, rounded at apex ( Fig. 39 ).

Elytra relatively broad, ca. 3 times longer than wide at humeri, slightly widening from humeri; with four prominent, almost equally developed primary costae, not significantly different from secondary ones; interstices with even rows of small subquadrate cells; pubescence dense, short and semi-erect, obscuring reticulation ( Fig. 39 ).

Legs relatively robust; femoris and tibiae subequal in length ( Fig. 39 ).

Aedeagus asymmetrical, robust, with narrow phallobase and broadly separated phallobasal lateral plates; median lobe slightly widened and noticeably bent left (in lateral view) distally ( Figs 141–142 ).

Female. Similar to male, but eyes somewhat smaller and antennae somewhat shorter, with broader antennomeres.

Length: 9.2–11.2 mm. Width (humerally): 2.2–2.5 mm.

ETYMOLOGY. The name of the new species is derived from the Greek for ‘large’ and the Latin for ‘impressed’, alluding to its size and conspicuous pronotal impressions.

DIAGNOSIS. Plateros macroimpressus sp.n. may be distinguished from the somewhat similar in habitus P. multiimpressus Pic, 1926 by the greater size and more robust aedeagus, with differently bent median lobe ( Figs 141–142 ).

DISTRIBUTION. Laos, Thailand.

Figures

Figs 29–40. General view of Plateros, holotype males: 29 — P. chinensis; 30 — P. nonus; 31 — P. cinis; 32 — P. planatomimus sp.n.; 33 — P. faber; 34 — P. raotensis sp.n.; 35 — P. huaphanensis sp.n.; 36 — P. xalinhensis sp.n.; 37 — P. sarmentosus sp.n.; 38 — P. tamdaoensis sp.n.; 39 — P. macroimpressus sp.n.; 40 — P. magnicauda sp.n. Рис. 29–40. ОбЩий вид Plateros, голотипы, самцы: 29 — P. chinensis; 30 — P. nonus; 31 — P. cinis; 32 — P. planatomimus sp.n.; 33 — P. faber; 34 — P. raotensis sp.n.; 35 — P. huaphanensis sp.n.; 36 — P. xalinhensis sp.n.; 37 — P. sarmentosus sp.n.; 38 — P. tamdaoensis sp.n.; 39 — P. macroimpressus sp.n.; 40 — P. magnicauda sp.n.

Figs 129–144. Aedeagi of Plateros, ventrally and laterally, holotype males: 129–130 — P. tamdaoensis sp.n.; 131–132 — P. raotensis sp.n.; 133–134 — P. huaphanensis sp.n.; 135–136 — P. xalinhensis sp.n.; 137–138 — P. macrolycoides sp.n.; 139–140 — P. planatomimus sp.n.; 141–142 — P. macroimpressus sp.n.; 143–144 — P. magnicauda sp.n. Scale: 0.5 mm. Рис. 129–144. Эдеагусы Plateros, сниЗу и сбоку, голотипы, самцы: 129–130 — P. tamdaoensis sp.n.; 131–132 — P. raotensis sp.n.; 133–134 — P. huaphanensis sp.n.; 135–136 — P. xalinhensis sp.n.; 137–138 — P. macrolycoides sp.n.; 139–140 — P. planatomimus sp.n.; 141–142 — P. macroimpressus sp.n.; 143–144 — P. magnicauda sp.n. МасштабнаЯ линейка: 0,5 мм.