Maladera wandingana Ahrens, Fabrizi & Liu, 2021

Fabrizi, Silvia, Liu, Wan-Gang, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2021, A monograph of the genus Maladera Mulsant & Rey, 1871 of China (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), Zootaxa 4922 (1), pp. 1-400 : 330-332

Maladera wandingana Ahrens, Fabrizi & Liu , sp. n.

Figures 79 A–D, 130

Type material examined. Holotype: ♂ “[ China] Yunnan, Wanding , 2011-IV-29, N: 24.086, E: 98.072, 900m / LW- 1249” ( ISAZ).

Description. Length: 9.8 mm, length of elytra: 7.1 mm, width: 5.5 mm. Body oval, dark brown, legs brown, antenna yellow, dorsal surface dull, labroclypeus, tarsomeres, and tibiae shiny, except long setae of head, and margins of pronotum and elytra glabrous.

Labroclypeus wide, trapezoidal, lateral margins slightly convex and convergent, producing with the ocular canthus a blunt angle, anterior angles moderately rounded, anterior margin weakly emarginate medially, margins weakly reflexed; surface flat, completely shiny, finely and densely punctate, glabrous; frontoclypeal suture finely incised, moderately curved; ocular canthus moderately wide and long (equals 1/3 of ocular width), finely and sparsely punctate, with a long terminal seta. Frons with fine, superficial, moderately dense punctures, with a few single setae beside eyes. Antenna with ten antennomeres, club with three antennomeres, 1.1 times as long as remaining antennomeres combined. Eyes moderately large, ratio diameter/ interocular width: 0.58. Mentum convexly elevated and flattened anteriorly.

Pronotum widest at base, lateral margins evenly convex and convergent anteriorly, anterior angles sharp and distinctly produced, posterior angles blunt; anterior margin weakly convex, with a fine complete marginal line; basal margin without marginal line; surface finely and moderately densely punctate, setae of lateral and anterior margin long and dense, punctures with microscopic setae only. Hypomeron carinate. Scutellum wide, triangular, punctation as on pronotum.

Elytra widest behind middle, striae finely impressed, finely punctate, intervals flat, finely and densely punctate; epipleural margin robust, ending at strongly rounded external apical angle of elytra, sparsely setose; apex of elytra with a fine membraneous rim of short microtrichomes.

Ventral face coarsely and densely punctate, nearly glabrous, only metasternal plate and lateral metacoxa with a few robust setae. Mesosternum between mesocoxae as wide as mesofemur. Ratio of length of metepisternum/ metacoxa: 1/ 1.84. Abdominal sternites finely and moderately densely punctate, each with a row of coarse punctures bearing each a robust seta. Pygidium weakly convex, coarsely and densely punctate, with moderately densely long setae on apical half.

Legs short and wide; femora finely and sparsely punctate, with two longitudinal rows of setae. Metafemur shiny, anterior margin acute, without adjacent serrated line, anterior row of setae reduced; posterior ventral margin, strongly widened in apical half, ventrally and dorsally not serrated, glabrous. Metatibia moderately long and wide, ratio width/ length: 1/ 2.33, sharply carinate dorsally, with two groups of spines, basal one shortly behind middle, apical one at five sixths of metatibial length, basally with a few robust and short setae; lateral face nearly flat, finely and sparsely superficially punctate on sides, along middle smooth; apex concavely emarginate interiorly near tarsal articulation. Tarsomeres impunctate dorsally, with moderately dense, fine setae ventrally; metatarsomeres ventrally with a strongly serrated carina, subventrally with a second, smooth longitudinal carina; first metatarsomere slightly shorter than following two tarsomeres combined, and little shorter than dorsal tibial spur. Protibia moderately long, bidentate, with a blunt external extension at middle; anterior claws symmetric, interior tarsal claws sharply pointed.

Aedeagus: Fig. 79 A–C. Habitus: 79D. Female unknown.

Diagnosis. The species differs from all other Chinese Maladera species by the extended, but separated, ventral lobes fused with the ventral phallobase, and being well separated from the dorsally positioned parameres.

Etymology. The name (adjective in the nominative singular case) of the new species is derived from the name of its type locality, Wanding.

Distribution. See map ( Fig. 130 ) and Table 1.

Figures

FIGURE 79. A–D: Maladera wandingana Ahrens, Fabrizi & Liu, sp. n. (holotype); E–H: M. trifidiforceps Ahrens, Fabrizi & Liu, sp. n. (holotype); I–L: M. nanlingensis Ahrens, Fabrizi & Liu, sp. n. (holotype). A, E, I: aedeagus, left side lateral view; C, G, K: aedeagus, right side lateral view; B, F, J: parameres, dorsal view; D, H, L: habitus. Scale: 0.5 mm. Habitus not to scale

FIGURE 130. Distribution of Maladera species with uncertain systematic status: Maladera panyuensis sp. n., M. parva (Moser, 1908), Maladera punctulata (Frey, 1972), M. rotunda (Arrow, 1946), M. tibialis (Brenske, 1898), M. trifidiforceps sp. n., M. wandingana sp. n.