Plycus prosvirovi Kazantsev, 2021

Kazantsev, Sergey V., 2021, New and little known taxa of neotenic lyropaeine net-winged beetles (Coleoptera Lycidae), Zootaxa 4965 (3), pp. 437-460 : 455-457

Plycus prosvirovi Kazantsev , sp. nov.

( Figs 60–66 )

Material. Holotype ♂, W Sumatra, 2 km WSW Bukittinggi , 0º18’39’’N 100º20’47’’E, 934 m, 24.II.2017, A. Prosvirov leg. ( ICM).

Description. Male. Body dark brown to black; elytral proximal fifth, apices of coxae and bases of trochanters and femora testaceous; antennomere 2, pronotum and scutellum, except at apex, light brown ( Figs 61, 62 ).

Vertex flat and minutely sparsely punctate behind antennal prominence, with scarce suberect pubescence. Eyes relatively large, interocular distance ca. 1.1 times greater than eye diameter. Labrum small, transverse, slightly concave anteriorly. Mandibles relatively short, when fully opened attaining only to the middle of maxillary palps, and strongly curved. Maxillary and labial palps slender; terminal palpomeres considerably longer than wide, glabrous and pointed at apex. Antennal sockets transverse, separated by narrow lamina. Antennae relatively short, attaining only to elytral middle, antennomeres 4–7 parallel-sided, slightly flattened; antennomeres 2 and 3 short, about as long as wide, subequal in length, together ca. 2 times shorter than antennomere 4; antennomeres 4–11 with dense, moderately long, almost erect pubescence and small elongate scales ( Figs 61, 62 ).

Pronotum transverse, trapezoidal, ca. 2.1 times wider than long, slightly bisinuate at posterior margin and sinuate at sides before anterior angles, with almost straight anterior margin, pronounced anterior and acute posterior angles; sides explanate, with relatively large and dense punctuation. Scutellum (postnotal plate of mesonotal scutellum) transverse, slightly narrowing distally, triangularly emarginate at apex ( Figs 61, 62 ).

Elytra long, ca. 2.9 times longer than wide at humeri, distinctly widened below shoulders; with primary costae not significantly different from secondary ones; interstices with irregular rows of small roundish cells; pubescence dense, relatively long and decumbent, almost completely obscuring reticulation ( Figs 61, 62 ).

Legs slender; femurs and tibiae straight, hind femurs ca. 1.4 times shorter than tibiae ( Figs 61, 62 ).

Male genitalia with proximally broad and noticeably ovally incised phallobase, with sub-sclerotized stripes between inner and outer frames; median lobe narrow, moderately long and straight, conspicuously widened proximally and noticeably concave in the middle in lateral aspect; parameres together slightly wider than long, with non-sclerotised processes subequal in length to parameres; apices of processes with short hairs ( Figs 65, 66 ).

Length: 6.7 mm. Width at humeri: 1.9 mm.

Female. Unknown.

Etymology. The new species is named after an Elateridae specialist Dr. A. Prosvirov (Moscow) who collected the unique type specimen.

Diagnosis. Plycus prosvirovi sp. nov., the only member of the genus, is readily distinguishable from Platerodrilus species by the generic characters.

Figures

FIGURES 60–66. General view and details of Plycus prosvirovi gen. nov., sp. nov., holotype male: 60–61—general view; 62–64—terminal abdominal segments; 65–66—aedeagus; 60, 62—dorsal view; 61, 65—ventral view; 63, 66—lateral view. Scale bars: 0.5 mm.