Maladera xinqiaoensis 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 : 275-277

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

Figures 64 J–M, 124

Type material examined. Holotype: ♂ “ China, W Fujian, 29.V. ~ 2km SE Xinqiao 27.05N 117.1E Jaroslav Turna leg., 2005/ 825 Sericini Asia spec.” ( ZFMK) . Paratypes: 1 ♂ “ CH, Guizhou prov., Leishan (NE), Leigong Shan (E slope), Fangxiang , 13-24.vi.2001 26°26.59’N 108°16.53’E, ~ 900m, C. Holzschuh ” ( CP) , 4 ♂♂, 2 ♀♀ “ China, W Guizhou prov. Leigongshan, Xijiang 29 May–2 Jun 1997 1200-1900m, Bolm lgt.” ( CP, ZFMK) , 1 ♂ “ Taojiang, Leishan , Guizhou, 7.VII. 1988, 950m, leg. Wang Shuyong / LW-763” ( IZAS) .

Description. Length: 7.1 mm, length of elytra: 5.3 mm, width: 4.6 mm. Body oval, reddish brown, head darker, antenna yellowish, dorsal surface dull, labroclypeus, tarsomeres, and tibiae shiny, glabrous.

Labroclypeus wide, lateral margins weakly convex and moderately convergent, anterior angles convex, anterior margin shallowly emarginate medially, lateral margins produce with ocular canthus an indistinct angle, margins weakly reflexed; surface shiny, weakly convex, finely and densely punctate, with a few long, erect setae anteriorly; smooth area in front of eyes 1.5 times as wide as long; frontoclypeal suture finely incised, bluntly angled medially; ocular canthus moderately wide and short (1/3 of ocular diameter), finely and densely punctate, without terminal seta. Frons with fine and dense punctures, with a few single setae beside eyes. Eyes moderately large, ratio diameter/ interocular width: 0.64. Antenna with ten antennomeres, club with three antennomeres and straight, slightly shorter than remaining antennomeres combined. Mentum convexly elevated and flattened anteriorly.

Pronotum widest at base, lateral margins weakly evenly convex and convergent anteriorly, anterior angles sharp and moderately produced; anterior margin convex, with complete but fine marginal line; basal margin without marginal line; surface finely and densely punctate, punctures with microscopic setae only, setae of lateral and anterior margin sparse; hypomeron carinate. Scutellum wide, triangular, punctation as in pronotum.

Elytra oval, widest at posterior third, striae finely impressed, finely punctate, intervals weakly convex, finely and densely punctate, with minute setae in punctures, odd intervals with a few erect short setae; epipleura 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, mesosternum densely shortly setose, only metasternal plate with numerous robust setae; metacoxa glabrous, with a few long setae laterally. Distance between mesocoxae as wide as mesofemur. Ratio of length of metepisternum/metacoxa: 1/1.45. Abdominal sternites finely and moderately densely punctate, each with a row of coarse punctures bearing each a robust seta. Pygidium dull, moderately convex, coarsely and densely punctate, on apex with a few long setae.

Legs moderately long and wide; femora superficially and sparsely punctate, with two longitudinal rows of setae. Metafemur dull, anterior margin acute, without adjacent serrated line, anterior longitudinal row of setae absent; posterior ventral margin almost straight, only little widened in apical half and serrated, dorsal posterior margin completely serrated, glabrous. Metatibia moderately long and wide, widest shortly before apex, dorsal and ventral margin subparallel, ratio width/length: 1/3.4, sharply carinate dorsally, with two groups of spines, basal one at middle, apical one at four fifths of metatibial length, basally with a few robust and short setae; lateral face weakly longitudinally convex, with dense coarse punctures; medial face with dense coarse punctures, apex shallowly and concavely emarginate interiorly near tarsal articulation. Tarsomeres impunctate dorsally, with dense, fine setae ventrally; metatarsomeres ventrally glabrous, with a strongly serrated carina, subventrally with a second, smooth longitudinal carina; first metatarsomere as long as following two tarsomeres combined, little longer than dorsal tibial spur. Protibia short, bidentate. Anterior claws symmetrical.

Aedeagus: Fig. 64 J–L. Habitus: Fig. 64M .

Diagnosis. Maladera xinqiaoensis Ahrens, Fabrizi & Liu , sp. n. differs from M. serripes (Moser, 1915) in the dorsal phallobase being much less developed distally and in the two ventral, long processes (instead of only one as in M. serripes ); the parameres of the new species differ in the left paramere being more sharply hooked and short, while the right is wider (in lateral view) and bent externally (dorsal view).

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

Variation. Length: 7.0– 8.4 mm, length of elytra: 4.9–6.0 mm, width: 4.1–4.8 mm. Female: eyes smaller than in male, ratio of diameter/interocular width: 0.49; antennal club with three antennomeres, distinctly shorter than remaining antennomeres combined; pygidium weakly convex and dull.

Distribution. See map ( Fig. 124 ) and Table 1.

Figures

FIGURE 64. A–D: Maladera serripes (Moser, 1915) (China: Fujian: Aotou); E–I: M. paraserripes Ahrens, Fabrizi & Liu, sp. n. (holotype); J–M: M. xinqiaoensis Ahrens, Fabrizi & Liu, sp. n. (holotype). A, E, J: aedeagus, left side lateral view; C, H, L: aedeagus, right side lateral view; B, F, K: parameres, dorsal view; G: aedeagus, ventral view; D, I, M: habitus. Scale: 0.5 mm. Habitus not to scale.

FIGURE 124. Distribution of the Maladera uncipenis group: Maladera tiammushanica sp. n., M. tianzushanica sp. n., M. uncipenis sp. n., M. xinqiaoensis sp. n..