Maladera harmonica ( Brenske, 1897 )

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 : 343

Maladera harmonica ( Brenske, 1897)

Figure 82 G–I

Autoserica harmonica Brenske, 1897: 405 .

Maladera harmonica: Ahrens 2006b: 237 ; 2007b: 23.

Type material examined. Holotype: ♀ “ China Futschau/ Geilenkeuser/ harmonica Type Brsk/ coll. Brenske / harmonica Brsk.” ( ZMHB).

Description. Length: 7.9 mm, length of elytra: 6.0 mm, width: 4.8 mm. Body oval, reddish brown, antenna yellow, dorsal surface dull, partly especially on pronotum with iridescent shine, head, tarsomeres, and tibiae shiny, dorsal surface glabrous.

Labroclypeus narrow, trapezoidal, lateral margins straight and moderately convergent, producing with the ocular canthus an indistinct blunt angle, anterior angles weakly rounded, anterior margin distinctly emarginate medially, margins moderately reflexed; surface flat, completely shiny, finely and densely punctate, with a few short setae anteriorly; frontoclypeal suture finely incised, moderately curved; ocular canthus moderately wide and long (equals 1/3 of ocular width), finely and sparsely punctate, with a short terminal seta. Frons shiny, in posterior third dull at middle, with fine, dense punctures, with a few single setae beside eyes. Antenna with ten antennomeres, club with three antennomeres, 0.8 times as long as remaining antennomeres combined. Eyes moderately large, ratio diameter/ interocular width: 0.53. Mentum convexly elevated and flattened anteriorly.

Pronotum widest at base, lateral margins evenly convex and convergent anteriorly, anterior angles sharp and distinctly produced, posterior angles blunt; anterior margin weakly convex, with a robust complete marginal line; basal margin without marginal line; surface finely and densely punctate, setae of lateral and anterior margin long and dense, punctures with microscopic setae only. Hypomeron carinate, not produced ventrally. Scutellum wide, triangular, punctation as on pronotum, on basal midline impunctate.

Elytra widest at posterior third, striae finely impressed, finely punctate, even intervals flat, odd intervals weakly convex, finely and densely punctate, punctures concentrate along striae, glabrous except minute setae in punctures; epipleural margin robust, ending at strongly rounded external apical angle of elytra, sparsely setose; apex of elytra with a very fine membraneous rim of short microtrichomes.

Figures

FIGURE 82. A–C: Maladera flammea (Brenske, 1898) (lectotype); D–F: M. exigua (Brenske, 1894) (lectotype); G–I: M. harmonica (Brenske, 1897) (lectotype). A, D, G: head, dorsal view; B, E, H: body, lateral view; C, F, I: habitus, dorsal view.