Maladera gansuensis ( Miyake & Yamaya, 2001 ) Fabrizi & Liu & Bai & Yang & Ahrens, 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 : 214-216

Maladera gansuensis ( Miyake & Yamaya, 2001) comb. n.

Figures 49 A–D, 114

Serica gansuensis Miyake & Yamaya, 2001: 35 ; Ahrens 2006b: 244; 2007b: 33.

Type material examined. Holotype: ♂ “ China. Gansu Mts. Minshan nr. Wudu 2100 1.VI.1999 A. Gorodinski / Holotype: Serica gansuensis, Ahrens, Fabrizi & Liu , sp. n. Y. Miyake, 1994” ( NMMC).

Additional material examined. 1 ♂ “ Eastern part of Gansu, 14.VI.1996, leg. Ren Guodong ” ( HBUM) , 1 ♂ “ Mt. Xinglongshan, Yuzhong , Gansu, 20-21.VIII.2007, leg. Zhang Chengli, Wang Xinpu ” ( HBUM) , 1 ♂ “ Mts. Jinfoshan, Nanchuan , Chongqing, 21-30.VII.2003, leg. Yuan Caixia, Liu Yushuang ” ( HBUM) , 1 ♂, 2 ♀♀ “Erlonghe, Jingyuan , Ningxia, 3-4.VII.2009, leg. Wang Xinpu, Zhao Xiaolin ” ( HBUM) , 1 ♂ “ Xiaonanchuan, Jingyuan , Ningxia, 25.V.1993, leg. Lu Caihong, Han Yaqin ” ( HBUM) , 1 ♂ “ Haopingsi Temple, Mts. Taibaishan , 10.V.1983, leg. Mts. Taibaishan Insect Collecting Group” ( MNAFU) , 1 ♂ “ China, S. Sichuan, Liangshan Mts. , S. Xichang h= 3000m, 1.vii.2002, leg. S. Murzin & I. Shokhin ” ( CP) , 1 ♂ “ China, Shaanxi, Tsinling Mts., 1600 m, Nat. Res. Foping , 33°51’N, 107°57’E, 20.iv.-11.v.1999 V. Siniaev & A. Pkutenko lgt.” ( CP) , 1 ♂, 1 ♀ “ China, 2000-2250m, Shaanxi, Qinling mts. Xunyangba (12 km SW) 14.-18.vi.1998 I.H. Marshal leg.” ( CP) , 11 ♂♂ “ China, NW Yunnan prov., env. Balakou pass, 3400m, 28.v.-7.vi.2008, S. Murzin & I. Shokhin leg.” ( CP) , 5 ♂♂, 2 ♀♀ “ China, S. Sichuan Liangshan Mts. S. Xichang h= 2700m, 2.vii.2002, leg. S. Murzin, I. Shokhin leg.” ( CP) .

Redescription. Length: 8.5 mm, length of elytra: 5.8 mm, width: 4.2 mm. Body oblong, reddish brown, antenna yellow, dorsal surface dull and almost glabrous.

Labroclypeus shortly subtrapezoidal and wide, widest at base, lateral margins straight and moderately convergent to weakly rounded anterior angles, lateral margin and ocular canthus producing a distinct blunt angle, margins weakly reflexed, anterior margin weakly emarginate medially; surface flat and moderately shiny, coarsely and very densely punctate, distance between punctures less than their diameter, punctures partly fused, anteriorly on the sides with a few long, erect setae; frontoclypeal suture very feebly incised and medially weakly angled; smooth area in front of eye very short and approximately twice as wide as long; ocular canthus long and slender, very finely and densely punctate, with a moderately long single terminal seta. Frons dull, in anterior quarter moderately shiny, with fine and somewhat irregularly scattered moderately dense punctures, with a few short setae beside eyes and laterally behind frontoclypeal suture. Eyes moderately large, ratio of diameter/ interocular width: 0.66. Antenna yellow, 10-segmented; club with three segments, almost 2.5 times as long as remaining joints combined. Mentum convexly elevated anteriorly.

Pronotum moderately wide, widest at base, lateral margins almost straight and weakly narrowed anteriorly, in anterior quarter weakly curved and in posterior half feebly concavely emarginate, anterior angles weakly produced and strongly rounded, posterior angles right angled and weakly rounded only in the tip, anterior margin strongly and convexly produced medially, with a distinct and wide marginal line, basal margin without marginal line; surface with moderately dense and fine punctures, with microscopic setae in punctures only; anterior and lateral margins setaceous; hypomeron distinctly carinate at base. Scutellum narrow and long, sharp at apex, with fine and not dense punctures, medially not smooth, microscopic setae present in the punctures.

Elytra oblong, widest in posterior third, striae distinctly impressed and finely and densely punctate, intervals weakly convex and not densely punctate, odd intervals with punctures concentrated along the striae and with some single fine setae; epipleural margin robust, ending at the strongly curved external apical angle of elytra, epipleura densely setaceous, apical border membraneous, with a rim of short microtrichomes.

Ventral surface dull, with large and dense punctures, sparsely and shortly setose, setae partly adpressed, metacoxa glabrous, laterally with fine setae; each abdominal sternite with indistinct transversal row of coarse punctures bearing short setae between fine and moderately dense punctation. Mesosternum between mesocoxae almost half as wide as mesofemur, with irregularly scattered fine setae. Ratio of length of metepisternum/ metacoxa: 1/ 1.37. Pygidium weakly convex at apex, finely and moderately densely punctate, without smooth midline, punctures with very minute setae, a few longer setae beside apical margin.

Legs slender and with shiny surface; femora with two longitudinal rows of setae, finely and moderately densely punctate; metafemur ventrally dull, sharply margined anteriorly and without a submarginal serrated line, posterior margin straight, with a few strong setae medially, only weakly widened externally in apical half and not serrated in distal half, internally not serrated, with short setae. Metatibia slender and long, widest at apex, ratio width/ length: 1/ 4.0, dorsally very weakly carinate, with two groups of spines, the basal group of spines shortly before half of metatibial length, apical one at three quarters of metatibial length, basally with a few single fine spines in punctures; lateral face longitudinally convex, with a fine sparse punctures; ventral margin finely serrated, with three fine, equally spaced spines, medial face not punctate, apex interiorly near tarsal articulation sharply truncate. Tarsomeres dorsally glabrous and impunctate, ventrally with sparse, short setae; metatarsomeres dorsally without longitudinal impressions, ventrally with a strongly serrated ridge, without longitudinal carina immediately beside it, first metatarsomere distinctly longer than the following joint and one third of its length longer than dorsal tibial spur. Protibia moderately long, bidentate, protarsal claws asymmetrical, basal tooth of inner protarsal claw widened but apically sharply pointed, a little longer than the narrow apical tooth.

Aedeagus: Fig. 49 A–C. Habitus: Fig. 49D .

Distribution. See map ( Fig. 114 ) and Table 1.

Figures

FIGURE 49. A–D: Maladera gansuensis (Miyake & Yamaya, 2001) (China: Sichuan: Songpan–Nanping); E–H: M. hongyuanensis Ahrens, Fabrizi & Liu, sp. n. (holotype). A, E: aedeagus, left side lateral view; C, G: aedeagus, right side lateral view; B, F: parameres, dorsal view; D, H: habitus. Scale: 0.5 mm. Habitus not to scale.

FIGURE 114. Distribution of the Maladera gansuensis group: Maladera gansuensis (Miyake & Yamaya, 2001), M. hongyuanensis sp. n., M. shaluishanica sp. n..