Maladera nanpingensis 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 : 271-272

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

Figures 63 I–L, 122

Type material examined. Holotype: ♂ “[ China] Milv, Nanping, Shangsi , Guangxi, 3.IV. 2002, 770m, light trap, leg. Xue Huaijun ” ( NKU).

Description. Length: 10.6 mm, length of elytra: 8.2 mm, width: 6.2 mm. Body oval, reddish brown, frons slightly darker, antenna yellow, labroclypeus shiny, remainder of dorsal surface dull, with several short setae on the head and at margin of pronotum and elytra.

Labroclypeus subtrapezoidal, wider than long, widest at base, lateral margins convex and convergent to strongly rounded anterior angles, lateral margin and ocular canthus producing a distinct blunt angle, margins moderately reflexed, anteriorly emarginate medially; surface weakly convex, shiny, coarsely and moderately punctate, with moderately long, erect setae; frontoclypeal suture feebly impressed and weakly curved medially; smooth area in front of eye approximately 2.5 times as wide as long; ocular canthus narrow and moderately long, finely punctate, with two terminal setae. Frons dull, with fine, dense punctures, glabrous except for a few setae beside eyes. Eyes moderately large, ratio of diameter/interocular width: 0.53. Antenna with 10 antennomeres; club with three antennomeres, 1.3 times as long as remaining antennomeres combined. Mentum anteriorly elevated and flattened.

Pronotum subtrapezoidal, widest at base, lateral margins convex and strongly convergent anteriorly, anterior angles produced and sharp, posterior angles blunt; anterior margin weakly convexly produced medially; marginal line medially moderately interrupted; surface finely and densely punctate, with minute setae in punctures only; anterior and lateral margins sparsely setose. Scutellum wide, triangular, with fine and dense punctures, each bearing a single minute seta, impunctate medially.

Elytra oblong, widest at middle, striae moderately impressed, finely and densely punctate, intervals moderately convex, with fine, dense punctures concentrated along striae, on odd intervals with a few fine, erect, short setae, otherwise punctures with minute setae; epipleural margin robust, ending at convex external apical angle of elytra, epipleura densely setose; apical border membraneous, with a rim of short microtrichomes.

Ventral surface dull, metasternum and metacoxa with large and dense punctures, sparsely setose, metacoxa glabrous except for a several long setae laterally. Mesosternum between mesocoxae as wide as mesofemur. Ratio of length of metepisternum/metacoxa: 1/1.7. Abdominal sternites, in addition to fine and moderately dense punctures, each with a distinct transverse row of coarse punctures each bearing a short and robust seta, punctures with microscopic setae, penultimate sternite apically with a shiny smooth chitinous border, which is one third as long as sternite. Pygidium moderately convex, finely and densely punctate, without smooth midline, punctures with microscopic setae and with a few long setae along apical margin.

Legs moderately long and wide; femora with two longitudinal rows of setae, finely and moderately densely punctate; metafemur dull, anterior margin acute, lacking an adjacent serrated line, anterior row of setae absent, posterior ventral margin straight, weakly widened in apical half and finely serrate, posterior dorsal margin completely serrated, finely setose. Metatibia moderately wide and long, widest at apex, ratio width/length: 1/3.0, dorsally sharply carinate, with two groups of spines, basal one at one third, apical one at three quarters of metatibial length; lateral face with dense and coarse punctures, punctures with minute setae; ventral margin serrate, with three strong spines of which the distal one is more distant; medial face impunctate; apex interiorly near tarsal articulation shallowly concave. Tarsomeres dorsally sparsely finely punctate, with dense setae ventrally; metatarsomeres of holotype missing. Protibia moderately long, bidentate; protarsal claws symmetric.

Aedeagus: Fig. 63 I–K. Habitus: Fig. 63L . Female unknown.

Diagnosis. Maladera nanpingensis Ahrens, Fabrizi & Liu , sp. n. differs from the closely related and similar Maladera bawanglingana Ahrens, Fabrizi & Liu , sp. n. in having the parameres bifid (split into two branches).

Etymology. The new species is named after its type locality, Nanping (adjective in the nominative singular).

Distribution. See map ( Fig. 122 ) and Table 1.

Figures

FIGURE 63. A–D: Maladera fengyangshanica Ahrens, Fabrizi & Liu, sp. n. (holotype); E–H: M. jaroslavi Ahrens, Fabrizi & Liu, sp. n. (holotype); I–L: M. nanpingensis 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 122. Distribution of the Maladera uncipenis group: Maladera constellata sp. n., M. fengyangshanica sp. n., M. guanxiensis sp. n., M. hunanensis sp. n., M. jaroslavi sp. n., M. nanpingensis sp. n., M. paraserripes sp. n..