Plateros xanthellus Kazantsev, 2020

Kazantsev, S. V., 2020, New species of Plateros Bourgeois from Sulawesi (Coleoptera: Lycidae), Russian Entomological Journal 29 (2), pp. 161-172 : 167-170

Plateros xanthellus Kazantsev , sp.n.

Figs 33–35 .

MATERIAL: Holotype, ♂, [ Indonesia], Sulawesi Tengah, Mt. Tambusisi , 500 ft, 1°40´S 121°20´E, 3–13.IV.1980, M.J.D. Brendell, B.M. 1980–280 ( NHML).

DESCRIPTION. Male. Yellow testaceous; antennomeres 1–2 and abdomen light to dark brown (antennomere 11 missing) ( Fig. 33 ).

Vertex with conspicuous round impression behind antennal prominence. Eyes large, interocular distance ca. 1.3 times shorter than eye diameter. Labrum small, transverse, almost truncate anteriorly. Palps slender; ultimate palpomeres robust, elongate, oval, almost pointed at apex. Antennal sockets separated by minute lamina. Antennae attaining to elytral two thirds, antennomeres 3–10 serrate; antennomere 3 ca. 3.5 times longer than antennomere 2 and ca. 1.1 times shorter than antennomere 4; antennomeres 3–11 with moderately long semi-erect pubescence ( Fig. 33 ).

Pronotum transverse, ca. 1.5 times as wide as long, feebly bisinuate basally and strongly almost triangularly produced anteriorly, with straight sides, short acute long posterior and conspicuous blunt anterior angles. Scutellum transverse, triangular, inconspicuously emarginate at apex ( Fig. 33 ).

168 S.V. Kazantsev

15 16 19 20 17 18 21 22

Elytra long, ca. 3.1 times longer than wide at humeri, slightly widening distally, with four equally developed primary costae, except noticeably stronger in proximal third humeral costa; interstices with even rows of small roundish cells; pubescence short and decumbent ( Fig. 33 ).

Legs slender ( Fig. 33 ).

Median lobe of aedeagus relatively short and robust, inconspicuously bent, with elongate rounded dents in distal half ( Figs 34–35 ).

Female. Unknown.

Length: 5.5 mm. Width (humerally): 1.4 mm.

ETYMOLOGY. The name of the new species is derived from the Latin for´yellowish´, alluding to its coloration.

DIAGNOSIS. Plateros xanthellus sp.n. is distinguishable from the similarly coloured P. flavidus Kleine, 1933 , known just by the female holotype, by only slightly serrate male antennae (vs. presumably ramose male antennae in P. flavidus ) and less transverse pronotum ( Fig. 33 ), while its aedeagus, with relatively short and robust median lobe, with elongate rounded dents in distal half ( Figs 37–38 ), allows separating the new species from all other Sulawesi congeners.

Figures

Figs 33–38. General view and aedeagi of Plateros, holotypes, males: 33–35 — P. xanthellus sp.n.; 36–38 — P. xenos sp.n.; 33, 36 — general view; 34–35, 37–39 — aedeagi; 33–34, 36–37 — dorsally; 35, 38 — laterally. Scale bars: 0.5 mm. Рис. 33–38. ОбЩий вид и Эдеагусы Plateros, голотипы, самцы: 33–35 — P. xanthellus sp.n.; 36–38 — P. xenos sp.n.; 33, 36 — обЩий вид; 34–35, 37–39 — Эдеагусы; 33–34, 36–37 — сверху; 35, 38 — сбоку. Масштабные линейки: 0.5 мм.