Penia mantillerii, Kundrata & Németh, 2019

Kundrata, Robin & Németh, Tamás, 2019, Description of Penia mantillerii sp. nov. (Coleoptera: Elateridae: Dimini), with a key to Penia species from Vietnam and nearby areas, Zootaxa 4612 (2), pp. 275-281 : 276-277

Penia mantillerii sp. nov.

( Figs 1–16 )

Type material. Holotype, male, „ VIETNAM, Lao Cai Prov., Hoang Lien NP, Tram Ton , 1915 m, 22.3493723°N, 103.7704565°E // forest edge, at light, 8.–11.IV.2010, leg. L. Papp, L. Peregovits & Z. Soltész, VN2010 PL _4“ ( HNHM).

Type locality. Vietnam: Lào Cai Province, Hoang Lien NP, Tram Ton Pass (22.3493723°N, 103.7704565°E) .

Diagnosis. Penia mantillerii sp. nov. differs from its congeners by the following unique combination of characters: body uniformly brown, elongate, antenna surpassing midlength of elytra ( Figs 1–3 ), antennomere IV 1.3 times longer than antennomere III ( Fig. 4 ), pronotum with divergent posterior angles ( Fig. 6 ), elytra elongate, combined about 2.3 times as long as wide ( Fig. 1 ), with large, window-like, rounded to angulate punctures ( Fig. 9 ), aedeagus elongate, about 3.5 times as long as wide, with median lobe gradually narrowed toward apex, and a parameral subapical hook very short, indistinct ( Figs 14–16 ).

The brown and elongate body of this species resembles P. costipennis Fleutiaux, 1936 and P. sucinea Schimmel, 2001 ( Figs 17, 18 ), both occuring also in Lŕo Cai Province in northern Vietnam. Penia costipennis differs from P. mantillerii sp. nov. in having antennomere IV about 2.5 times longer than antennomere III, the pronotal posterior angles oriented posteriorly, and the elytral interstria VI forming more distinct carina ( Fig. 17 ). Penia sucinea is larger, with more elongate elytra, antennomere IV 2.7 times longer than antennomere III, scutellar shield about as long as wide, with more rounded sides, much smaller elytral punctures, and differently shaped male sternite IX and aedeagus ( Figs 18, 20, 22, 23, 27–30 ).

Description. Holotype, male. Body elongate ( Figs 1–3 ) 7.4 mm long, 2.5 mm wide, moderately convex in lateral view, uniformly brown; pubescence yellow-brown to pale-brown.

Head ( Fig. 5 ) including eyes about 0.7 times as wide as pronotum at midlength; frons flattened, slightly overhanging base of labrum, frontal carina incomplete. Head surface smooth, with shallow, rounded to sub-oval punctures, with sparse, long, semi-erect pubescence oriented anteriorly. Eyes partially covered by pronotum. Labrum wider than long, convex, finely and shallowly punctate, rounded anteriorly, with long, semi-erect pubescence. Mandibles bidentate, shiny, basally with long pubescence. Maxillary palp with apical palpomere elongate-securiform, about twice as long as wide, apically obliquely widened and slightly flattened. Labial palp with apical palpomere securiform. Antenna ( Figs 1–4 ) with 11 antennomeres, filiform, surpassing elytral midlength. Length ratio of antennomeres II–IV = 1.0: 1.5: 2.0. Scape thicker than remaining antennomeres; antennomeres II–X slightly widened apically; pedicel about 1.5 times as long as wide; antennomere III about 2.5 times as long wide; remaining antennomeres 3.0–3.5 times as long as wide; apical antennomere elongate, slightly longer than penultimate, slightly widened pre-apically; all antennomeres covered with long, fine, semi-erect to erect pubescence.

Pronotum ( Fig. 6 ) widest at posterior angles, 1.35 times as wide as long at middle part, and 1.50 times as wide as long at posterior angles. Anterior edge concave; anterior angles narrowly rounded, slightly produced anterad; sides evenly rounded; posterior angles long, sharp, divergent; posterior edge with short notch near each angle, medially with shallow angulate emargination, about as long as width of scutellar shield. Lateral carina complete, clearly visible from dorsal view. Sublateral carina distinct, complete. Disc almost smooth, sparsely covered with fine, shallow punctures, with moderately dense, long, semi-erect to erect pubescence. Hypomeron flat, smooth, sparsely and finely punctate. Pronotosternal sutures sinuate. Prosternum ( Fig. 2 ) elongate, including prosternal process about 1.7 times as long as wide, punctation like on hypomeron; prosternal lobe rounded; prosternal process ( Figs 3, 7 ) behind procoxae oriented postero-dorsally, almost straight in lateral view, sides subparallel-sided, with slight constriction before 2/3 of its length, toward apex gradually narrowed, apically narrowly rounded. Scutellar shield ( Fig. 8 ) flat, about 1.25 times as long as wide; anterior margin slightly rounded, with sharp edge; sides slightly rounded; posterior edge narrowly rounded; surface shiny, with sparse long pubescence. Mesoventrite ( Fig. 2 ) about as long as wide; surface shiny; anterior edge medially with short protrusion; posterior process projected between mesocoxae; procoxal rests with indistinct borders, mesoventral cavity rhomboid, deep, with distinct borders. Mesanepisternum with transverse lateral extensions of procoxal rests; anterior edge rounded. Metaventrite long, sparsely and finely punctate. Metacoxal plate ( Fig. 2 ) transverse, abruptly openly emarginate posteriorly, gradually strongly reduced after half. Elytra ( Figs 1, 3 ) combined about 2.3 times as long as wide, about 4.4 times as long as pronotum, widest slightly beyond midlength, sides narrowed from about 2/3 of their length to apex; with striae formed by lines of punctures; basal portion of elyta laterally from stria V towards elytral margin slightly sloping ventrad; punctures small before humeri and in apical portion of elytra, large and window-like medially ( Fig. 9 ), without setae; interstriae convex, smooth, shiny, with sparse, fine, semi-erect setae oriented posteriorly; elytral apices narrowly rounded. Epipleura complete, smooth, beyond humeri of about the same width along its whole length. Hind wings fully developed. Leg ( Figs 1–3 ) long; tibia slender, with paired spurs; tarsomeres I and II simple, tarsomere I longer than tarsomere II, tarsomeres III and IV longer than wide, each ventrally with distinct lobe, tarsomere III shorter than tarsomere II and longer than tarsomere IV, tarsomere V elongate, distinctly narrower than preceding tarsomeres; pubescence semierect, tarsal claw simple.

Abdomen ( Fig. 2 ) with ventrites with fine, oval punctures; ventrite 1 with intercoxal process short, triangular; ventrite V subtriangular, rounded apically; all ventrites with semi-erect pubescence. Tergite VIII ( Fig. 10 ) subtriangular, wider than long, constricted before posterior end, widely rounded posterad, finely punctate, with long setae at edges. Sternite VIII ( Fig. 11 ) transverse, about 1.7 times as wide as long, apically with semi-circular emargination, finely punctate, with short setae, with several longer setae latero-apically. Tergite IX ( Fig. 12 ) about 1.3 times as long as wide, sides subparallel at first half, gradually rounded and narrowed towards apex at second half, finely punctate and covered with sparse long setae, mainly laterally. Tergite X ( Fig. 12 ) about twice as long as wide, membranous posterad. Sternite IX ( Fig. 13 ) three times as long as wide. Aedeagus ( Figs 14–16 ) about 3.5 times as long as wide. Median lobe slightly curved in lateral view, reaching beyond parameres, gradually narrowed toward apex, very slightly constricted subapically, apex almost pointed; basal struts short, divergent. Paramere gradually narrowed toward apex, constricted subapically; apical lobe with short subapical hook, apex pointed. Phallobase short, wider than long.

Etymology. The species name is a patronym in honor of Antoine Mantilleri (MNHN, Paris).

Figures

FIGURES 1–16. Penia mantillerii sp. nov., male holotype. 1, habitus, dorsal view; 2, habitus, ventral view; 3, habitus, lateral view; 4, basal and median antennomeres; 5, head, anterodorsal view; 6, pronotum, dorsal view; 7, prosternal process, lateral view; 8, scutellar shield, dorsal view; 9, detail of elytral disk, dorsal view; 10, abdominal tergite VIII; 11, abdominal sternite VIII; 12, abdominal tergites IX–X; 13, abdominal sternite IX; 14, aedeagus, dorsal view; 15, aedeagus, ventral view; 16, aedeagus, lateral view. Scale bars = 2.0 mm (Figs 1–3), 1.0 mm (Figs 6, 14–16), 0.5 mm (Figs 4, 5, 7, 9, 11, 13), 0.2 mm (Figs 8, 10, 12).

FIGURES 17–30. 17, Penia costipennis Fleutiaux, 1936, male lectotype, habitus, dorsal view (credit: MNHN/A. Mantilleri). 18–31, Penia sucinea Schimmel, 2001. 18, habitus, dorsal view; 19, habitus, lateral view; 20, basal and median antennomeres; 21, pronotum, dorsal view; 22, scutellar shield, dorsal view; 23, detail of elytral disk, dorsal view; 24, abdominal tergite VIII; 25, abdominal sternite VIII; 26, abdominal tergites IX–X; 27, abdominal sternite IX; 28, aedeagus, dorsal view; 29, aedeagus, ventral view; 30, aedeagus, lateral view. Scale bars = 2.0 mm (Figs 17–19), 1.0 mm (Fig. 21), 0.5 mm (Figs 20, 23–30), 0.2 mm (Fig. 22).