Platerodrilus (Duliticola) berastagiensis 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 : 449-451

Platerodrilus (Duliticola) berastagiensis Kazantsev , sp. nov.

( Figs 31 , 40 , 53–55 )

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; antennomeres 1–3, head, pronotum, scutellum and elytra, except at distal third, orange testaceous ( Fig. 31 ).

Vertex flat and minutely sparsely punctate behind antennal prominence, with scarce suberect pubescence. Eyes relatively small, interocular distance ca. 1.7 times greater than eye diameter. Labrum small, transverse, slightly convex anteriorly. Mandibles long, only slightly shorter than maxillary palps, and relatively robust. 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, relatively robust, slightly dentate, with distal width of antennomeres noticeably surpassing proximal width; antennomeres 2 and 3 short, about as long as wide, subequal in length, together ca. 1.7 times shorter than antennomere 4; antennomeres 4–11 with dense, moderately long, erect pubescence and small roundish scales ( Fig. 31 ).

Pronotum transverse, ca. 1.8 time wider than long, semi-trapezoidal, bisinuate at posterior margin, slightly convex at sides and at anterior margin, with pronounced anterior and acute posterior angles; sides explanate, with relatively large and scarce punctuation. Scutellum (postnotal plate of mesonotal scutellum) elongate, narrowing distally, bulging, rounded at apex ( Fig. 31 ).

Elytra long, ca. 2.9 times longer than wide at humeri, almost parallel-sided; with four equally developed primary costae, not much different from secondary ones; interstices with irregular rows of small roundish cells; pubescence dense, short and decumbent, almost completely obscuring reticulation ( Fig. 31 ).

Legs relatively robust; femoris and tibiae straight, subequal in length ( Fig. 31 ).

Abdominal terminalia relatively broad; penultimate tergite medially narrowed, with median triangular incision distally and proximally; terminal ventrite moderately long, its distal portion attenuate ( Fig. 40 )

Male genitalia with transverse, rectangularly proximally incised phallobase; median lobe narrow, relatively short and evenly curved in lateral view, slightly widened distally and conspicuously widened proximally; parameres completely sclerotised, constituting ca. 0.7 length of median lobe, evenly curved in lateral aspect, with numerous sharp dents on outer ventral surface, median diamond-shaped incision proximally at base dorsally and a pair of husk-like, noticeably curved proximal apodemes ( Figs 53–55 ).

Length: 9.7 mm. Width at humeri: 2.4 mm.

Female. Unknown.

Etymology. Platerodrilus berastagiensis sp. nov. is named after the type locality.

Diagnosis. Platerodrilus berastagiensis sp. nov. is readily distinguishable from P. wongi Masek et Bocak, 2014 , the only other Platerodrilus from Sumatra with fully sclerotised and dentate parameres, by the bicoloured elytra, as well as by the shorter parameres and less widened distally and distinctly more widened proximally median lobe of the aedeagus ( Figs 31 , 53–55 ).

Figures

FIGURES 28–33. General view of Platerodrilus, males: 28–29— P. (Duliticola) svetae; 30—P. (D.) strbai; 31—P. (D.) berastagiensis sp. nov.; 32—P. (Zhelongia) grootaerti; 33—P. (Zh.) holynskae; 30–31, 33—holotypes; 28–29, 32—paratypes. Scale bars: 2 mm.

FIGURES 34–42. Details of Platerodrilus, males: 34–35—P. (s. str.) gorbunovi sp. nov.; 36—P. (s. str.) kambanganus sp. nov.; 37–38—P. (Duliticola) svetae; 39—P. (D.) strbai; 40—P. (D.) berastagiensis sp. nov.; 41—P. (Zhelongia) grootaerti; 42—P. (Zh.) holynskae; 34–36, 38–40, 42—holotypes; 37, 41—paratypes; 37, 41—hind wing; 34–36, 38–40, 42—terminal abdominal segments; 34, 36, 38–40,—dorsal view; 35, 37, 41—ventral view; 42—lateral view. Scale bars: 2 mm.

FIGURES 49–59. Aedeagi of Platerodrilus, males: 49–50—P. (Duliticola) svetae; 51–52—P. (D.) strbai; 53–55—P. (D.) berastagiensis sp. nov.; 56–57—P. (Zhelongia) grootaerti; 58–59—P. (Zh.) holynskae; 49–55, 58–59—holotypes; 56–57—paratype; 55—dorsal view; 49, 51, 53, 56, 58—ventral view; 50, 52, 54, 57, 59—lateral view. Scale bars: 0.5 mm.