Plateros anguliplanatus Kazantsev, 2021

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

Plateros anguliplanatus Kazantsev , sp.n.

Figs 15 , 95–96 .

MATERIAL: Holotype, ♂, Cambodia: Kbal, Spean ( ACCB) – Phom Kullen N.P., 24.VII.2004 (24038), P. Grootaert leg. ( IRSN); paratypes: 2 ♀♀, same label ( ICM and IRSN); ♂, N Vietnam, Hoa Binh, 13.X.1976; ♂, Thailand, Chiangmai Zoo , 18°49´N 98°57´E, 400 m, 21–28.V.1988, Chantaramongkol leg. ( ICM); ♂, N Vietnam,

Bac Giang, Rai Yen Tu Nat. Res., 6 km SW Than Son , 21°12.812´N, 106°45.846´E, 86 m, light trap, 20.V.2015, F. Creuzburg leg. ( NME).

DESCRIPTION. Male. Dark brown to black; pronotum, scutellum and elytra testaceous; head, pro- and mesotrochanters and bases of front and middle femoris light brown to testaceous ( Fig. 15 ).

Vertex with prominent roundish impression behind antennal prominence. Eyes moderately large, interocular distance ca. 1.2 times shorter than eye diameter. Labrum small, transverse, somewhat rounded anteriorly. Palps slender; ultimate palpomeres considerably longer than wide, noticeably narrowed and flattened at apex. Antennal sockets separated by narrow lamina. Antennae attaining to elytral middle, antennomeres 3–10 flattened, noticeably dentate; antennomere 3 ca. 2.6 times longer than antennomere 2 and ca. 1.3 times shorter than antennomere 4; antennomeres 3–11 with dense moderately long erect pubescence ( Fig. 15 ).

Pronotum transverse, ca. 1.2 times as wide as long, with slightly concave sides, moderately bisinuate basally and strongly triangularly produced anteriorly, with rounded middle third; with short acute, only slightly protruding laterally posterior and blunt anterior angles. Scutellum transverse, parallel-sided, truncate at apex ( Fig. 15 ).

Elytra relatively broad, ca. 3 times longer than wide at humeri, slightly wider from humeri; with four prominent, almost equally developed primary costae, not significantly different from secondary ones; interstices with even rows of irregular roundish cells; pubescence dense, short and decumbent, obscuring reticulation ( Fig. 15 ).

Legs slender; femoris and tibiae narrow, subequal in length ( Fig. 15 ).

Aedeagus symmetrical, with narrow phallobase and approximate, but not contiguous phallobasal lateral plates; median lobe straight and narrow, only slightly bent in lateral view, with distinct triangular preapical dents ( Figs 95–96 ).

Female. Similar to male, but eyes relatively smaller and antennae less dentate.

Length: 4.0– 7.1 mm. Width (humerally): 0.9–1.8 mm.

ETYMOLOGY. The name of the new species is derived from the Latin for ‘corner’ and the species name ‘ planatus ’, alluding to the similarity of these two taxa, on the one hand, and to the triangular distal lobes of its aedeagus, on the other.

DIAGNOSIS. Plateros anguliplanatus sp.n. may be distinguished from the similar-looking P. planatus Waterhouse, 1879 by the straighter aedeagus with distinct preapical dents ( Figs 95–96 ).

DISTRIBUTION. Vietnam, Thailand, Cambodia.

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.