Plateros unisuturalis Kazantsev, 2020

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

Plateros unisuturalis Kazantsev , sp.n.

Figs 12–13 , 29–30 .

MATERIAL: Holotype, ♂, Indonesia, S Sulawesi, W Palopo, trail nr. Puri Rimba Resort , 2°58´00´´S 120°05´13´´E, 720–850 m, 23–27.I.2020, S. Kazantsev leg. ( ICM).

DESCRIPTION. Male. Orange testaceous; ultimate labial palpomeres, maxillary palpomeres 3–4, antennomere 1 distally, antennomeres 3–11, femora and tibiae distally, tarsi and abdomen, except terminal segments (ventrite 8 and tergites 9–10), dark brown ( Fig. 12 ).

Vertex with small deep round impression behind antennal prominence. Eyes moderately large, interocular distance subequal in length to eye diameter. Labrum small, transverse, almost truncate anteriorly, inconspicuously emarginate medially. Palps slender; ultimate palpomeres small, elongate, gradually widened distally, obliquely truncate and flattened at apex. Antennal sockets separated by narrow lamina. Antennae attaining to elytral four fifths, antennomeres 3–10 serrate; antennomere 3 ca. 2.5 times longer than antennomere 2 and 1.5 times shorter than antennomere 4; antennomeres 3– 11 with long erect pubescence ( Figs 12–13 ).

Pronotum transverse, ca. 1.2 times as wide as long, conspicuously bisinuate basally and triangularly produced anteriorly, with almost straight parallel sides, acute rounded posterior and conspicuous blunt anterior angles. Scutellum trapezoidal, slightly widening and rounded distally ( Fig. 13 ).

Elytra long, ca. 3.8 times longer than wide at humeri, noticeably widening distally, with four equally developed primary costae; interstices 4–5 with even rows of small sub-rectangular transverse cells, interstice 1 with irregular reticulation, except in the middle, interstices 2–3 with even rows of small sub-rectangular transverse cells, except basally; pubescence short and decumbent ( Fig. 12 ).

Legs relatively robust ( Fig. 12 ).

Aedeagus with elongate narrow curved median lobe; phallobase relatively broad, with fused lateral sutures ( Figs 29–30 ).

Female. Unknown.

Length: 10.2 mm. Width (humerally): 2.4 mm.

ETYMOLOGY. The name of the new species is derived from the Latin for´with one suture´, alluding to the fused lateral sutures of its phallobase.

DIAGNOSIS. Plateros unisuturalis sp.n. is somewhat similar to P. tanatorajensis Tvardik, Bocák, 2001 in the shape of the male genitalia, separable by the testaceous upperside, as well as by the differently bent median lobe of the aedeagus ( Figs 12–13 , 29–30 ).

REMARKS. Plateros unisuturalis sp.n., 10.2 mm long, is the largest male Plateros specimen known from Sulawesi so far. Only the female of Plateros toliensis Tvardik et Bocák, 2001 , 10.9 mm long, somewhat exceeds it in length [ Tvardik, Bocák, 2001].

Figures

Figs 10–14. General view and anterior part of body of Plateros, holotypes: 10–11 — P. uluwayensis sp.n.; 12–13 — P. unisuturalis sp.n.; 14 — X. wartabonensis sp.n.; 10, 12, 14 — general view; 11, 13 — anterior part of body, dorsally; 10–11 — female; 12–14 — males. Рис. 10–14. ОбЩий вид и переднЯЯ часть тела Plateros, голотипы: 10–11 — P. uluwayensis sp.n.; 12–13 — P. unisuturalis sp.n.; 14 — X. wartabonensis sp.n.; 10, 12, 14 — обЩий вид; 11, 13 — переднЯЯ часть тела, сверху; 10–11 — самка; 12–14 — самцы.

Figs 23–32. Aedeagi of Plateros, holotypes, males: 23–24 — P. pallidimarginatus sp.n.; 25–26 — P. rimbaensis sp.n.; 27–28 — P. rubiginosus sp.n.; 29–30 — P. unisuturalis sp.n.; 31–32 — P. wartabonensis sp.n.; 23, 31 — dorsally; 25, 27, 29 — ventrally; 24, 26, 28, 30, 32 — laterally. Scale bars: 0.5 mm. Рис. 23–32. Эдеагусы Plateros, голотипы, самцы: 23–24 — P. pallidimarginatus sp.n.; 25–26 — P. rimbaensis sp.n.; 27–28 — P. rubiginosus sp.n.; 29–30 — P. unisuturalis sp.n.; 31–32 — P. wartabonensis sp.n.; 23, 31 — сверху; 25, 27, 29 — сниЗу; 24, 26, 28, 30, 32 — сбоку. Масштабные линейки: 0.5 мм.