Plateros abbreviatus Kazantsev, 2021

Kazantsev, S. V., 2021, A review of Plateros Bourgeois, 1879 of Indochina (Coleoptera: Lycidae), Russian Entomological Journal 30 (1), pp. 47-73 : 49-51

Plateros abbreviatus Kazantsev sp.n.

Figs 55 , 175–176 .

MATERIAL: Holotype, ♂, [N] Vietnam, mountains near Tam Dao , 300 m, 5.IX.1961, O. Kabakov leg. ( ZIN); paratype, ♂, [N] Vietnam, resort Tam Dao, 300 m, 10.XI.1962, O. Kabakov leg. ( ICM).

DESCRIPTION. Male. Dark brown to black; pronotum, except at disk, scutellum and elytra dark red ( Fig. 55 ).

Vertex with conspicuous roundish excavation between eyes and relatively broad median impression behind antennal prominence. Eyes relatively small, interocular distance ca. 1.25 times greater than eye diameter. Labrum small, transverse, rounded 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 three fifths, narrow, dentate; antennomere 3 ca. 3.6 times longer than antennomere 2 and ca. 1.5 times shorter than antennomere 4; antennomeres 3–11 with moderately long erect pubescence ( Fig. 55 ).

Pronotum transverse, ca. 1.5 times wider than long, slightly trapezoidal, almost straight basally and noticeably semi-circularly produced anteriorly, with acute, protruding laterally posterior and rounded anterior angles. Scutellum subquadrate, parallel-sided, noticeably triangularly incised at apex ( Fig. 55 ).

Elytra long, ca. 4 times longer than wide at humeri, parallel-sided; with four slender, almost equally developed primary costae, only humeral costa considerably stouter in proximal half; interstices with even rows of irregular subquadrate cells; pubescence dense, short and decumbent ( Fig. 55 ).

Legs slender, long; femoris and tibiae narrow, subequal in length ( Fig. 55 ).

Aedeagus asymmetrical, with narrow phallobase and almost complete median suture; median lobe narrow, almost straight, in distal half slightly twisted, bearing a narrow tooth and deprived of lobes, with prominent tooth in the middle and distal third ( Figs 175–176 ).

Female. Unknown.

Length: 6.9–8.6 mm. Width (humerally): 1.3–1.9 mm.

ETYMOLOGY. The name of the new species is derived from the Latin for ‘abbreviated’, according to the abbreviated lobes of its aedeagus ( Figs 175–176 ).

DIAGNOSIS. Plateros abbreviatus sp.n. may be easily separated from the congeners by the completely abbreviated lobes of the somewhat twisted median lobe of the aedeagus ( Figs 175–176 ), as well as by the narrow body and dark red upperside ( Fig. 55 ).

DISTRIBUTION. North-eastern Laos.

Figures

Figs 53–63. General view of Plateros, males: 53 — P. kabakovi; 54 — P. siniaevi sp.n.; 55 — P. abbreviatus sp.n.; 56 — P. gemellus sp.n.; 57 — P. propinquus; 58 — P. baolokensis sp.n.; 59 — P. merulus; 60 — P. macrolycoides sp.n.; 61 — P. phoupanensis sp.n.; 62 — P. leptohelix sp.n.; 63 — P. stenohelix sp.n.; 53–56, 58–63 — holotypes. Рис. 53–63. ОбЩий вид Plateros, самцы: 53 — P. kabakovi; 54 — P. siniaevi sp.n.; 55 — P. abbreviatus sp.n.; 56 — P. gemellus sp.n.; 57 — P. propinquus; 58 — P. baolokensis sp.n.; 59 — P. merulus; 60 — P. macrolycoides sp.n.; 61 — P. phoupanensis sp.n.; 62 — P. leptohelix sp.n.; 63 — P. stenohelix sp.n.; 53–56, 58–63 — голотипы.

Figs 169–188. Aedeagi of Plateros, ventrally and laterally, males: 169–170 — P. merulus; 171–172 — P. kabakovi; 173–174 — P. siniaevi sp.n.; 175–176 — P. abbreviatus sp.n.; 177–178 — P. phoupanensis sp.n.; 179–180 — P. leptohelix sp.n.; 181–182 — P. stenohelix sp.n.; 183–184 — P. baolokensis sp.n.; 185–186 — P. gemellus sp.n.; 187–188 — P. propinquus; 169–186 — holotypes. Scale: 0.5 mm. Рис. 169–188. Эдеагусы Plateros, сниЗу и сбоку, самцы: 169–170 — P. merulus; 171–172 — P. kabakovi; 173–174 — P. siniaevi sp.n.; 175–176 — P. abbreviatus sp.n.; 177–178 — P. phoupanensis sp.n.; 179–180 — P. leptohelix sp.n.; 181–182 — P. stenohelix sp.n.; 183– 184 — P. baolokensis sp.n.; 185–186 — P. gemellus sp.n.; 187–188 — P. propinquus; 169–186 — голотипы. МасштабнаЯ линейка: 0,.5 мм.