Platerodrilus (s. str.) brastagicola 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 : 443-445

Platerodrilus (s. str.) brastagicola Kazantsev , sp. nov.

( Figs 22, 23 , 43, 44 )

Material. Holotype ♂, N Sumatra, Karo reg., env. Berastagi , 03º13’N 98º30’E, 1100–1400 m, mountain forest, 2–4.II.2018, A. Prosvirov leg. ( ICM).

Description. Male. Body dark brown; antennomere 3, pronotum, scutellum and elytra testaceous ( Figs 22– 23 ).

Vertex flat, glabrous and minutely sparsely punctate behind antennal prominence, with scarce suberect pubescence. Eyes small, interocular distance ca. 2 times greater than eye diameter. Labrum small, transverse, truncate anteriorly. Mandibles relatively small and short, when fully opened attaining only to the middle of maxillary palpomere 2. Maxillary and labial palps slender; terminal palpomeres considerably longer than wide, glabrous and pointed at apex. Antennal sockets transverse, separated by narrow lamina. Antennae slender, reaching two thirds of elytral length when inclined, antennomeres 4–11 narrow and parallel-sided, antennomeres 4–8 slightly compressed; antennomeres 2 and 3 short, wider than long, with antennomere 3 slightly shorter than antennomere 2, together ca. 2.5 times shorter than antennomere 4; antennomeres 4–11 with dense, moderately long, almost erect pubescence and small roundish scales ( Figs 22–23 ).

Pronotum transverse, ca. 2.1 times wider than long, trapezoidal, posterior margin slightly bisinuate, anterior and lateral margins slightly convex, anterior angles rounded, posterior angles acute; sides of pronotum explanate, with relatively large and scarce punctuation. Scutellum (postnotal plate of mesonotal scutellum) elongate, almost parallel-sided, rounded at apex ( Figs 22–23 ).

Elytra long, ca. 3 times longer than wide at humeri, slightly widening distally; with four equally developed primary costae; interstices with irregular punctuation of small roundish cells; pubescence dense, short and decumbent, almost completely obscuring elytral structure ( Figs 22–23 ).

Legs slender; femoris and tibiae straight and narrow, subequal in length ( Figs 22–23 ).

Abdominal terminalia moderately long; penultimate tergite medially relatively narrow; terminal ventrite moderately long, its distal portion attenuate.

Male genitalia with subquadrate, proximally noticeably incised phallobase; median lobe of male genitalia narrow, moderately long and straight, conspicuously gradually widened proximally and curved in lateral aspect; parameres round, together ca. 1.7 times wider than long, with narrow non-sclerotised processes, slightly shorter than parameres, provided with short hairs at apices and a pair of curved narrow proximal apodemes ( Figs 43, 44 ).

Length: 7.4 mm. Width at humeri: 2.0 mm.

Female. Unknown.

Etymology. The name of the new species is derived from the type locality and the Latin for ‘dweller’.

Diagnosis. Platerodrilus brastagicola sp. nov. is similar to P. sibayakensis Masek et Bocak, 2014 , also from the Berastagi (‘Brastagi’) area in Sumatra, but can be distinguished from the latter by the uniformly testaceous elytra and not produced forward anterior pronotal angles, as well as by the somewhat broader and rounder parameres and less bulging apex of the median lobe of the aedeagus ( Figs 22, 23 , 43, 44 ).

Figures

FIGURES 22–27. General view and details of Platerodrilus, males: 22–23—P. (s. str.) brastagicola sp. nov.; 24–25—P. (s. str.) gorbunovi sp. nov.; 26—P. (s. str.) kambanganus sp. nov.; 27—P. (Duliticola) svetae; 22, 24–26—general view; 23—anterior part of body; 27—head; 22–26—holotypes; 27—paratype; 22–26—dorsal view; 27—anterior view. Scale bars: 2 mm.

FIGURES 43–48. Aedeagi of Platerodrilus, holotype males: 43–44—P. (s. str.) brastagicola sp. nov.; 45–46—P. (s. str.) gorbunovi sp. nov.; 47–48—P. (s. str.) kambanganus sp. nov.; 47—dorsal view; 43, 45—ventral view; 44, 46, 48—lateral view. Scale bars: 0.5 mm.