Maladera opaciventris (Moser, 1915) 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 : 30-31

Maladera opaciventris (Moser, 1915) comb. n.

Figures 5 A–D, 86

Autoserica opaciventris Moser, 1915b: 355 ; Niijima & Kinoshita 1923: 29.

Aserica opaciventris: Murayama 1938: 12 .

Maladera opaciventris: Kim & Lee 1997: 129 ; Kim & Kim 2003: 88; Ahrens 2006b: 237.

Eumaladera opaciventris: Ahrens 2007b: 5 .

Maladera coreana Kim & Kim, 2003: 83 , syn. by Ahrens 2007b: 5.

Type material examined. See Ahrens (2007).

Additional material examined. China: 1 ♂ “ Mt. Longwangshan, Anji , Zhejiang, 10.VIII.1995, leg. Wu Hong ” ( IZAS) , 1 ♂ “ Mt. Longwangshan, Anji , Zhejiang, 20.VII. 1995, 450m, leg. Wu Hong ” ( IZAS) , 1 ♂ “ Mt. Longwangshan, Anji , Zhejiang, 20.VII. 1995, 450m, leg. Wu Hong ” ( IZAS) , 1 ♂ “ Mt. Longwangshan , Anji, Zhejiang, 1.VIII.1995, leg. Zhu Xuwei ” ( IZAS), 2 ♂♂ “China: Zhejiang, Lin’an City, Danming Shan, 30°02’04’’N, 118°59’14’’E, light trap, 860 m, 7.VII.2014 ” ( SNUC), 1 ♂ “China: Zhejiang, Lin’an City, Danming Shan, 30°02’04’’N, 118°59’14’’E, light trap, 860 m, 15.VII.2014 ” ( SNUC), 1 ♂ “China: An’hui Yuexi County Yaoluoping N.R. nr. resort 30°59’05’’N, 116°04’41’’E light trap alt. 1050m 16.vi.2013 Dai & Peng leg.” ( SNUC). South Korea: 3 ex. “ 16.06.2010 Hongik Univ., Seoul (S̹dkorea) leg. T. Kölkebeck ” ( ZFMK), 1 ex. “ 23.06.2010 Suri-san, Gunpo-si , Geonggi-do (S̹dkorea) leg. T. Kölkebeck ” ( ZFMK), 1 ex. “ 24.06.2010 Hwaseong , Suwon (S̹dkorea) leg. T. Kölkebeck ” ( ZFMK), 1 ♂, 3 ♀♀ “ Seoul Korea ” ( CF), 2 ♂♂ “ Tschi-li Ost-China ” ( CF) .

Description. Length: 8.1 mm, length of elytra: 5.8 mm, width: 4.5 mm. Body oblong-oval, dark reddish brown, antenna yellow, dorsal face shiny, nearly glabrous, ventral face dull.

Labroclypeus wide and subtrapezoidal, widest at base, lateral margins weakly convex and convergent anteriorly, anterior angles strongly rounded, anterior margin moderately emarginate, margins moderately reflexed; lateral margin and ocular canthus produce an indistinct angle; surface weakly convex, coarsely, very densely punctate, with numerous long setae; frontoclypeal suture distinctly incised, weakly curved; smooth area anterior to eye convex, twice as wide as long; ocular canthus moderately long and wide (1/3 of ocular diameter), finely densely punctate, with two terminal setae. Frons shiny, with very dense and coarse punctures, and moderately dense, erect setae. Eyes large, ratio diameter/ interocular width: 0.8. Antenna with ten antennomeres; club with three antennomeres and straight, as long as remaining antennomeres combined. Mentum elevated and slightly flattened anteriorly.

Pronotum moderately transverse, widest at base, lateral margins in basal half staright and subparallel, in anterior half weakly convex and convergent anteriorly, anterior angles distinctly produced and sharp, posterior angles blunt; anterior margin straight, with fine marginal line, base without marginal line; surface very finely and densely punctate, with minute setae in punctures being as long as puncture diameter, otherwise glabrous; anterior and lateral margin densely setose; hypomeron carinate, not produced ventrally. Scutellum wide, triangular, with fine, very dense punctures.

Elytra widest in posterior third, striae finely impressed, finely and densely punctate, odd intervals weakly convex, even ones flat, with fine, very dense punctures, with minute setae in punctures, penultimate lateral interval with a few fine setae; epipleural margin robust, ending at apical external angle of elytra, epipleura densely setose; apical border of elytra membraneous, with a very fine rim of microtrichomes (visible at ca 100x magnification).

Ventral surface dull, coarsely and densely punctate, metasternum including disc densely setose; metacoxa glabrous, with a few longer setae laterally. Abdominal sternites finely and densely punctate, punctures with minute setae, each sternite with a transverse row of punctures each bearing a fine seta. Mesosternum between mesocoxae as wide as mesofemur. Ratio of length of metepisternum/metacoxa: 1/1.35. Pygidium dull, weakly convex, finely and densely punctate, without smooth midline, with dense short and numerous long and fine setae.

Legs moderately long and wide, shiny; femora with two longitudinal rows of setae, coarsely and moderately densely punctate. Anterior margin of metafemur acute, with adjacent continuous serrated line, anterior row of setae complete; posterior ventral margin smooth, moderately widened at ventral apex, dorsal posterior margin smooth, neither serrate, glabrous. Metatibia short and wide, widest at apex, ratio of width/length: 1/2.5, sharply carinate dorsally, with two groups of spines, basal group at three fifths, apical group at five sixths of metatibial length, in basal half with a few short and robust single setae and a continuous serrated line beside entire dorsal margin; lateral face longitudinally convex, with dense coarse punctures, punctures setose; ventral margin finely serrate, with four equidistant robust setae; medial face smooth and glabrous; apex finely serrate, distinctly deeply emarginate interiorly near tarsal articulation. Tarsomeres dorsally impunctate and glabrous, neither laterally nor dorsally carinate, moderately setose ventrally; metatarsomeres with a strongly serrated ridge ventrally and a smooth subventral longitudinal carina; first metatarsomere little shorter than following tarsomere and little longer than dorsal tibial spur. Protibia moderately long, bidentate; anterior claws symmetrical, basal tooth of both claws bluntly truncate at apex.

Aedeagus: Fig. 5 A–C. Habitus: Fig. 5D .

Distribution. See map ( Fig. 86 ) and Table 1.

Figures

FIGURE 5. A–D: Maladera opaciventris (Moser, 1915) (China: Zhejiang: Mt. Longwangshan); E–I: M. robustula Ahrens, Fabrizi & Liu, sp. n. (holotype); J–N: M. wipfleri Ahrens, Fabrizi & Liu, sp. n. (holotype). A, E, J: aedeagus, left side lateral view; C, H, M: aedeagus, right side lateral view; B, F, G, K, L: parameres, dorsal view; D, H, N: habitus. Scale: 0.5 mm. Habitus not to scale.

FIGURE 86. Distribution of the subgenus Eumaladera: Maladera fencli sp. n., M. opaciventris (Moser, 1915), M. robustula sp. n., M. subrugata (Moser, 1926), Maladera wipfleri sp. n. (not precisely localized collection site indicated by a “?”).