Neoserica (s.l.) curvipenis, Liu, Wan-Gang, Fabrizi, Silvia, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2014

Liu, Wan-Gang, Fabrizi, Silvia, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2014, A taxonomic revision of the Neoserica (sensu lato) pilosula group (Coleoptera, Scarabaeidae, Sericini), ZooKeys 440, pp. 89-113 : 97-100

Taxon classification Animalia Coleoptera Scarabaeidae

Neoserica (s.l.) curvipenis sp. n. Figs 4 I–L, 5

Type material examined.

Holotype: ♂ "Yunnan 2000-3000m 27.20N, 100.11E Habashan mts. SE slope 10-13/7. Vit Kubáň leg. 92/ [ex] coll. Milan Nikodým, Praha" (ZFMK). Paratypes: 1 ♀ "Yunnan 2000-3000m 27.20N, 100.11E Habashan mts. SE slope 10-13/7. Vit Kubáň leg. 92/ [ex] coll. Milan Nikodým, Praha" (ZFMK), 1 ♂ "Yunnan cca 2000m 27.15N, 100.09E Hutiao gorge Jinsha r. 18-22/7. leg. Vit Kubáň leg. 92" (ZFMK), 1 ♂ "China West Sichuan Moximian Luding Co. 13.-18.7.94 Benes" (ZFMK), 1 ♂ "China; Yunnan prov.; Daju - 50km N Lijiang; 27.21N, 100.19E; S. Bečvář leg.; 21. –27.vi.1993” (CPPB), 2 ♂♂, 1 ♀ "China Yunnan 2000-3000m 27°20'N, 100°11'E Habashan Mts. SE slope, 10.[-]13.7.1992. D. Král lgt." (NMPC), 1 ♂ "Yunnan ca. 2000m 27.15N, 100.09E Hutiao gorge Jinsha r. 18-22.7.92 leg. David Král” (NMPC), 1 ♂ "Qingyinge, Emeishan, Sichuan, 22.IX.1957, 800-1000m, leg. Zhu Fuxing" (IZAS).

Description.

Body length: 7.6 mm, length of elytra: 5.2 mm, width: 4.0 mm. Body oblong, reddish brown, antennal club yellowish brown, dorsal surface shiny, densely covered with fine, semi-erect setae (Fig. 4L).

Labroclypeus subtrapezoidal, widest at base; lateral margins convex and convergent towards moderately rounded anterior angles; anterior margin distinctly sinuate medi ally; margins moderately reflexed; surface weakly convex medially, coarsely and finely but densely punctate, densely setose. Frontoclypeal suture finely incised, weakly elevated and moderately angled medially. Smooth area anterior to eye 1.5 times as wide as long. Ocular canthus narrow and moderately long, sparsely punctate, with a few long seta. Frons with coarse and dense punctures mixed with sparse, fine ones, with dense setae being bent posteriorly. Eyes large, ratio diameter/interocular width: 0.71. Antenna with ten antennomeres, club with four antennomeres and straight, as long as remaining antennomeres combined. Mentum elevated and slightly flattened anteriorly. Labrum short and almost straight anteriorly, with a transverse rim of very dense, short and robust setae.

Pronotum widest at base, lateral margins evenly convex and moderately convergent towards moderately produced and sharp anterior angles; posterior angles blunt, rounded at tip; anterior margin with fine, complete marginal line, weakly produced medially; surface densely and finely punctate, densely setose; anterior and lateral borders with dense, long setae; hypomeron carinate at base. Scutellum small, with fine, dense punctures and dense, fine setae.

Elytra oblong, widest behind middle, striae weakly impressed, finely and densely punctate; intervals flat, odd ones slightly convex; intervals with fine, dense punctures, punctures on odd intervals concentrated along striae, densely covered with fine, moderately long setae. Epipleural edge fine, ending at moderately curved external apical angle of elytra; epipleura densely setose, apical border with a wide membranous rim of microtrichomes (visible at magnification 100 ×).

Ventral surface shiny, finely and densely punctate. Metasternum with short, fine setae. Metacoxa glabrous, with a few single setae laterally. Abdominal sternites finely and densely punctate, finely setose, with a transverse row of coarse punctures each bearing a long seta. Mesosternum between mesocoxae as wide as mesofemur. Ratio of length of metepisternum/metacoxa: 1/1.74. Pygidium moderately convex and shiny, finely and densely punctate, without smooth midline; with dense, long setae on disc and beside the apical margin.

Legs slender; femora with two longitudinal rows of setae, finely and densely punctate. Anterior margin of metafemur acute, without adjacent serrated line; posterior margin of metafemur smooth, dorsally and ventrally, in apical half moderately widened, dorsal posterior margin with sparse, fine setae. Metatibia wide and moderately long, widest at two thirds of metatibial length; ratio of width/length: 1/3.33; dorsal margin sharply carinate, with two groups of spines; basal group shortly behind middle of metatibial length, apical group at three quarters of metatibial length; basally with a few strong short single setae in coarse puncture with serrated borders; lateral face moderately densely and coarsely punctate, shortly setose; ventral edge finely serrated, with four robust equidistant setae; medial face impunctate; apex weakly truncate interiorly near tarsal articulation. Tarsomeres ventrally with sparse, short setae; not carinate laterally, impunctate dorsally; metatarsomeres with a strongly serrated ventral ridge; first metatarsomere distinctly shorter than following two tarsomeres combined and slightly longer than dorsal tibial spur. Protibia moderately long, bidentate; anterior claws symmetrical, basal tooth of inner claw sharply truncate at apex.

Aedeagus: Fig. 4 I–K.

Diagnosis.

Neoserica curvipenis sp. n. differs from the two previous species by the extremely widely curved right paramere exceeding significantly beyond the level of the left paramere (in dorsal view).

Etymology.

The name of the new species is derived from the combined Latin words, curvi - curved, and penis - aedeagus, with reference to the curved shape of the right paramere.

Variation.

Body length: 6.6-8.1 mm, length of elytra: 4.9-5.6 mm, width: 4.0-4.4 mm. Female: antennal club composed of four antennomeres, as long as the remaining antennomeres combined.