Plateros bellipratensis Kazantsev, 2021

Kazantsev, S. V., 2021, A review of Plateros Bourgeois, 1879 of Indochina (Coleoptera: Lycidae), Russian Entomological Journal 30 (1), pp. 47-73 : 53

Plateros bellipratensis Kazantsev , sp.n.

Figs 189–191 .

MATERIAL: Holotype, ♂, N Vietnam, Ninh Binh pr., 90 km SW Hanoi, Cuc Phuong N.P., env.centre, 20°18´48´´N, 105°38´12´´E, 320 m, LFF, primary forest, 11.V.2017, A. Weigel leg. ( NME); paratype, ♂, same label ( ICM).

DESCRIPTION. Male. Dark brown; antennomere 2, pronotum, scutellum and elytra orange testaceous ( Fig. 189 ).

Vertex with conspicuous deep round impression behind antennal prominence. Eyes relatively large, interocular distance ca. 1.1 times shorter than eye diameter. Labrum small, transverse, concave anteriorly. Palps slender; ultimate palpomeres noticeably longer than wide, almost parallel-sided, obliquely convex and flattened at apex. Antennal sockets separated by minute lamina. Antennae moderately long, attaining to elytral two thirds, antennomeres 4–10 dentate; antennomere 3 ca. 6 times longer than antennomere 2 and ca. 1.1 times shorter than antennomere 4; antennomeres 3–11 with short erect pubescence ( Fig. 189 ).

Pronotum transverse, ca. 1.8 times wider than long, trapezoidal, with slightly concave sides, somewhat bisinuate basally and triangularly produced anteriorly, with prominent acute posterior and distinct blunt anterior angles; in anterior half with distinct narrow median keel; in posterior fifth with prominent oval impression. Scutellum transverse, parallel-sided, slightly semi-circularly incised at apex ( Fig. 189 ).

Elytra long, ca. 3.25 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 subquadrate cells; pubescence dense, short and decumbent, almost obscuring reticulation ( Fig. 189 ).

Legs slender; femoris and tibiae narrow, subequal in length ( Fig. 189 ).

Aedeagus asymmetrical, with narrow phallobase and approximate, but not contiguous phallobasal lateral plates; median lobe slender, slightly widened and bent in distal third ( Figs 190–191 ).

Female. Unknown.

Length: 5.5–5.8 mm. Width (humerally): 1.3–1.5 mm.

ETYMOLOGY. The name of the new species is derived from the Latin for ‘cuc phuong’ (daisy meadow), after the national park in northern Vietnam where the type series was collected.

DIAGNOSIS. By the shape of the aedeagus Plateros bellipratensis sp.n. may be placed near P. korshunovi Kazantsev, 2011 , readily separable by the different coloration, only slightly dentate antennae and pronotal structure with a median keel in anterior half and long acute posterior angles ( Fig. 189 ), as well as by the slenderer median lobe of the aedeagus with less widened and bent distal third ( Figs 190–191 ).

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.