Plateros proplanatus Kazantsev, 2021

Kazantsev, S. V., 2021, A review of Plateros Bourgeois, 1879 of Indochina (Coleoptera: Lycidae), Russian Entomological Journal 30 (1), pp. 47-73 : 67

Plateros proplanatus Kazantsev , sp.n.

Figs 16 , 93–94 .

MATERIAL: Holotype, ♂, [N] Vietnam, mountains SW Dong Hoi, 200 m, 20.XI.1961, O. Kabakov leg. ( ICM); paratype, ♀, same label ( ICM).

DESCRIPTION. Male. Dark brown to black; pronotum, scutellum and elytra testaceous ( Fig. 16 ).

Vertex with wide shallow roundish impression behind antennal prominence. Eyes large, interocular distance ca. 1.5 times shorter than eye diameter. Labrum small, transverse, truncate anteriorly. Palps slender; ultimate palpomeres noticeably longer than wide, narrow, obliquely truncate and flattened at apex. Antennal sockets separated by narrow lamina. Antennae noticeably dentate; antennomere 3 ca. 5.6 times longer than antennomere 2 and subequal in length to antennomere 4; antennomeres 3–11 with dense short erect pubescence ( Fig. 16 ).

Pronotum transverse, ca. 1.4 times as wide as long, with noticeably concave sides, moderately bisinuate basally and strongly semi-circularly produced anteriorly, with short acute, not protruding laterally posterior and blunt anterior angles. Scutellum transverse, parallel-sided, slightly incised at apex ( Fig. 16 ).

Elytra relatively broad, ca. 3.5 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 roundish cells; pubescence dense, short and decumbent ( Fig. 16 ).

Legs slender; femoris and tibiae narrow, subequal in length ( Fig. 16 ).

Aedeagus symmetrical, with narrow phallobase and contiguous phallobasal lateral plates; median lobe straight and narrow, only slightly bent left in distal half, with distal opening staring from the middle ( Figs 93–94 ).

Female. Similar to male, but larger, with smaller eyes and distinctly less dentate antennae.

Length: 7.5–9.3 mm. Width (humerally): 1.8–2.3 mm.

ETYMOLOGY. The name of the new species is derived from the Latin for ‘anti’ and the species name ‘ planatus ’, alluding to the similarity of these two taxa, on the one hand, and to the opposite bend of the median lobe of its aedeagus, on the other.

DIAGNOSIS. Plateros proplanatus sp.n. may be distinguished from the somewhat similar-looking P. planatus by the more dentate antennae and more elongate pronotum with round- ed anterior margin ( Fig. 16 ), as well as by the opposite bend of the distal half of the median lobe of its aedeagus ( Figs 93–94 ).

DISTRIBUTION. Northern Vietnam.

Figures

Figs 13–16. General view of Plateros, holotype males: 13 — P. nonus; 14 — P. cinis; 15 — P. anguliplanatus sp.n.; 16 — P. proplanatus sp.n. Рис. 13–16. ОбЩий вид Plateros, голотипы, самцы: 13 — P. nonus; 14 — P. cinis; 15 — P. anguliplanatus sp.n.; 16 — P. proplanatus sp.n.

Figs 64–98. Aedeagi of Plateros, ventrally and laterally, males: 64–65 — P. chapaensis; 66–67 — P. fedorenkoi; 68–69 — P. hoi; 70– 71 — P. napolovi; 72–73 — P. loeiensis; 74–75 — P. tenebrosus; 76–77 — P. gavryushini; 78–79 — P. haucki; 80–81 — P. hergovitsi; 82 — P. nitidus; 83–84 — P. melniki; 85–86 — P. nonus; 87–88 — P. cinis; 89–90 — P. faber; 91–92 — P. kabakovianus; 93–94 — P. proplanatus sp.n.; 95–96 — P. anguliplanatus sp.n.; 97–98 — P. sarmentosus sp.n.; 66–81, 83–98 — holotypes; 82 — lectotype. Scale: 0.5 mm. Рис. 64–98. Эдеагусы Plateros, сниЗу и сбоку, самцы: 64–65 — P. chapaensis; 66–67 — P. fedorenkoi; 68–69 — P. hoi; 70–71 — P. napolovi; 72–73 — P. loeiensis; 74–75 — P. tenebrosus; 76–77 — P. gavryushini; 78–79 — P. haucki; 80–81 — P. hergovitsi; 82 — P. nitidus; 83–84 — P. melniki; 85–86 — P. nonus; 87–88 — P. cinis; 89–90 — P. faber; 91–92 — P. kabakovianus; 93–94 — P. proplanatus sp.n.; 95–96 — P. anguliplanatus sp.n.; 97–98 — P. sarmentosus sp.n.; 66–81, 83–98 — голотипы; 82 — лектотип. МасштабнаЯ линейка: 0,5 мм.