Maladera infuscata (Moser, 1915)

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 : 63-65

Maladera infuscata (Moser, 1915)

Figures 12 E–H, 92

Autoserica infuscata Moser, 1915: 340 ; Nijima and Kinoshita 1927: 6.

Aserica infuscata: Murayama 1938: 13 [misidentified].

Serica infuscata: Murayama 1954: 41 [misidentified].

Maladera infuscata: Nomura1959: 40 ; Nomura 1974: 104, 109, fig. 48 [misidentified]; Sun & Zhang 1982: 324; Kim & Lee 1997: 122; Kim & Kim 2003: 89.

Autoserica koreana Moser, 1919: 330 ; Niijima & Kinoshita 1923: 29; syn. by Ahrens 2003d: 2; Aserica koreana: Murayama 1938: 15 [misidentified]; Serica koreana: Murayama 1954: 65 [misidentified].

Maladera koreana: Kim and Lee 1997: 129 [misidentified].

Aserica okamotoi Murayama, 1938: 18 .

Serica okamotoi: Murayama 1954: 35 .

Maladera okamotoi: Kim and Lee, 1997: 126 ; Kim and Kim 2003: 88, syn. by Ahrens 2003d: 2.

Type material examined. See Ahrens (2003d).

Additional material examined. 1 ♂ “ Panmundzoa Korea ” ( CP), 3 ♂♂ “ Jiugongshan Tongshan, S-Hubei, 1.V.2004 leg. Wen ” ( ZFMK), 1 ♂ “ Linjiang, 21.VI.1955 ” ( IZAS), 1 ♂ [doubtful record] “ China: Inner Mongolia Mt. Daquangdingzishan (2061m) Chifeng 2-12.vii.2009 local coll. Ankauf via Li Jingke 2010” ( ZFMK), 1 ♂, 2 ♀♀ “Tsingtau Prof. Hofmann/ Autoserica infuscate Mos. J. Moser det 1917” ( DEIC), 1 ♂ “ Kuatun (2300 m) 27, 40 n.Br. 117,40 ö. L. J. Klapperich 20.6.1938 (Fukien)” ( CF), 1 ♀ “ Kuatun (2300 m) 27, 40 n.Br. 117,40 ö. L. J. Klapperich 30.5.1938 (Fukien)” ( CF), 1 ♀ “ Kuatun (2300 m) 27, 40 n.Br. 117,40 ö. L. J. Klapperich 11.6.1938 (Fukien)” ( CF), 1 ♀ “ Kuatun (2300 m) 27, 40 n.Br. 117,40 ö. L. J. Klapperich 12.5.1938 ( Fukien )” ( CF).

Redescription. Length: 9.1 mm, length of elytra: 6.5 mm, width: 5.2 mm. Body oval, reddish brown, antenna yellow, labroclypeus shiny, remainder of dorsal surface dull, glabrous, except for a few small setae on the head and elytra.

Labroclypeus subtrapezoidal, distinctly wider than long, widest at base, straight and strongly convergent to moderately rounded anterior angles, lateral border and ocular canthus producing a distinct blunt angle, margins weakly reflexed, anteriorly very shallowly emarginate medially; surface weakly convex medially, shiny, finely punctate, distance between punctures irregular sometimes less than their diameter, with a few short, erect setae anteriorly; frontoclypeal suture feebly impressed and weakly curved medially; smooth area in front of eye approximately twice as wide as long; ocular canthus short and moderately broad, finely punctate, with a single short terminal seta. Frons with fine, moderately dense punctures, glabrous except for a few setae beside eyes. Eyes small, ratio of diameter/ interocular width: 0.57. Antenna yellow, with ten antennomeres; club with three antennomeres, as long as remaining antennomeres together. Mentum anteriorly elevated and flattened.

Pronotum widest at base, lateral margins weakly and evenly convex and convergent anteriorly, anterior angles distinctly produced and sharp, anterior marginal line widely interrupted medially, margin weakly and convexly produced medially; surface moderately densely and finely punctate, with very minute setae in punctures only; anterior and lateral borders setose. Scutellum broad, triangular, with fine and moderately dense punctures, each bearing a single very minute seta.

Elytra oblong, widest at middle, striae distinctly impressed, finely and densely punctate, intervals moderately convex, with fine, moderately dense punctures, penultimate lateral interval with a few fine, erect, short setae, some punctures with very minute setae; epipleural margin robust, ending at the weakly convex external apical angle of elytra, epipleura densely setose, apical border chitinous, with short microtrichomes.

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

Legs moderately broad; femora with two longitudinal rows of setae, finely and moderately densely punctate; metafemur dull, anterior margin acute, lacking an adjacent serrated line, posterior ventral margin medially straight, weakly widened in apical half and not serrate, dorsally not serrated, finely setose. Metatibia moderately broad and long, widest at apex, ratio width/ length: 1/ 3.4, dorsally sharply carinate, with two groups of spines, basal one at middle, apical one at three quarters of metatibial length, basally with a few punctures, each bearing short single spines; lateral face longitudinally convex, with sparse and fine punctures in basal half, glabrous; ventral margin serrate, with three strong spines equidistant from each other, medial face not punctate, apex interiorly near tarsal articulation shallowly concave. Tarsomeres very sparsely and finely punctate dorsally, ventrally with sparse, short setae; metatarsomeres ventrally with a strongly serrated ridge, beside which is a strong longitudinal carina, first metatarsomere a little shorter than the two following segments combined and a little longer than the upper tibial spur. Protibia short, bidentate. All claws symmetrical, feebly curved and long, with normally developed basal tooth.

Aedeagus: Fig. 12 E–G. Habitus: 12H.

Distribution. See map ( Fig. 92 ) and Table 1.

Figures

FIGURE 12. A–D: Maladera anhuiensis Ahrens, Fabrizi & Liu, sp. n. (holotype); E–H: M. infuscata (Moser, 1915) (China: Hubei: Jiugongshan); I–L: M. diversipes (Moser, 1915) (China: Hubei: Wujiashan). 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 92. Distribution of the subgenus Omaladera: Maladera infuscata (Moser, 1915), M. johannesi Ahrens & Fabrizi, 2016, M. juntongi sp. n., M. masumotoi Nomura, 1974 (not precisely localized collection site indicated by a “?”), M. ovatula (Fairmaire, 1891).