Maladera habashanensis 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 : 196-198

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

Figures 44 I–L, 111

Type material examined. Holotype: ♂ “ China: Yunnan; 1995; Habashan mts. , 2500-3800m 27.20N 100.11E; 3.-6.vi.; SE slope; S. Becvar leg./ 838 Sericini : Asia spec.” ( CP) . Paratypes: 4 ♂♂ “ China: Yunnan prov.; Gaoligongshan mts.; 90km W of Baoshan; S. Becvar leg.; 26.-29.v.1995 ” ( CP, ZFMK), 3 ♂♂ “[ China] Yunnan 1500- 2500m 25.22N 98.49E 17-24/5 Gaoligong mts. Vit Kuban leg. 1995” ( CP), 1 ♂ “S. China, Yunnan prov., 18 km SW Baoshan, 2100m, 16.19. v.2003, leg. S. Murzin ” ( CP), 5 ♂♂, 4 ♀♀ “ China, W. Yunnan prov, mts. 60Km E Tengchong, 2200m, 19.-22.v.2006, S. Murzin & I. Shokhin leg.” ( CP), 1 ♂ “[ China] Yunnan 1500-2500m 25.22N 98.49E 17-24/5 Gaoligong mts. Vit Kuban leg. 1995/ 318 Sericini : Asia spec.” ( CP), 1 ♂ “ China: Yunnan Prov. Zizhi vill., 29.vi.-2.vii.2016 25°43.7’N, 98°34.1’E, 1995m at light in village J. Hájek & J. Růžicka ” ( NMPC) .

Description. Length: 8.4 mm, length of elytra: 6.0 mm, width: 4.7 mm. Body oblong-oval, reddish brown, dull, antenna and labroclypeus yellow, labroclypeus shiny, except some single setae on head dorsal surface nearly glabrous.

Labroclypeus narrow and subtrapezoidal, widest at base, lateral margins straight and subparallel, anterior angles moderately rounded, anterior margin weakly emarginate medially, margins distinctly reflexed; lateral margin and ocular canthus produce a distinct angle; surface flat, finely and densely punctate, with a few larger punctures each bearing an erect seta; frontoclypeal suture indistinctly incised, evenly curved; smooth area anterior to eye weakly convex, twice as wide as long; ocular canthus moderately long and narrow (1/4 of ocular diameter), finely and densely punctate, with a terminal seta. Frons dull, behind frontoclypeal suture narrowly shiny, with sparse, fine punctures, with a few long setae behind frontoclypeal suture and beside eyes. Eyes very large, ratio diameter/ interocular width: 0.82. Antenna with ten antennomeres; club with three antennomeres and strongly reflexed, 2.5 times as long as remaining antennomeres combined. Mentum elevated and slightly flattened anteriorly.

Pronotum transverse, widest in posterior third, lateral margins evenly convex and strongly convergent anteriorly, anterior angles moderately produced and sharp, posterior angles strongly rounded; anterior margin convex, with complete robust marginal line, base without marginal line; surface finely and densely punctate, with minute setae in punctures; lateral anterior and lateral margin finely setose; hypomeron carinate, not produced ventrally. Scutellum wide, triangular, with fine, dense punctures.

Elytra widest shortly behind middle, striae distinctly impressed, finely and sparsely punctate, intervals slightly convex, with fine and dense punctures concentrated along striae, with minute setae in punctures, odd intervals with a very few short setae; epipleural margin robust, ending at strongly curved external apical angle of elytra, epipleura sparsely setose; apical border of elytra membraneous, with a rim of microtrichomes (visible at ca 100x magnification).

Ventral surface dull, coarsely and densely punctate, glabrous, metasternal disc sparsely covered with fine, short setae; metacoxa with a few longer setae laterally. Abdominal sternites finely and densely punctate, glabrous, 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: 1/1.4. Pygidium convex and dull, coarsely and densely punctate, without impunctate midline, glabrous except a few robust setae along apical margin.

Legs moderately long and wide, shiny; femora with two longitudinal rows of setae, finely and sparsely punctate. Metafemur with anterior margin acute, without adjacent serrated line, anterior row of setae reduced to a few single setae; posterior margin smooth, weakly widened at apex and smooth ventrally, not serrate dorsally, finely shortly setose. Metatibia moderately long and wide, widest at middle, ratio of width/length: 1/3.2, sharply carinate dorsally, with two groups of spines, basal group at middle, apical group at three quarters of metatibial length, with a few robust setae basally subparallel to dorsal margin; lateral face longitudinally convex, shiny, sparsely punctate and glabrous; ventral margin finely serrate, with three long and robust setae of which distal one is more distant; medial face smooth and glabrous; apex finely serrate, moderately truncate interiorly near tarsal articulation. Tarsomeres dorsally sparsely and finely punctate, punctures with short setae, moderately setose ventrally; metatarsomeres with a strongly serrated ridge ventrally and a smooth subventral longitudinal carina, laterally and dorsally carinate; first metatarsomere as long as following two tarsomeres combined and distinctly longer than dorsal tibial spur. Protibia moderately long, bidentate; anterior claws symmetrical, basal tooth of both claws bluntly truncate at apex.

Aedeagus: Fig. 44 I–L. Habitus: Fig. 44L .

Diagnosis. Maladera habashanensis Ahrens, Fabrizi & Liu , sp. n. is similar to M. sinobiloba Ahrens, Fabrizi & Liu , sp. n in external morphology and shape of the genitalia, differing from M. sinobiloba in lacking rudimentary lateral basal lobes on the parameres.

Etymology. The name (adjective in the nominative singular) of the new species is derived from the type locality situated in the Habashan mountains.

Variation. Length: 7.6–8.4 mm, length of elytra: 5.6–6.0 mm, width: 4.4–4.7 mm. Female: eyes smaller than in male, ratio of diameter/interocular width: 0.6; antennal club with three antennomeres, as long as remaining antennomeres combined; pygidium weakly convex.

Distribution. See map ( Fig. 111 ) and Table 1.

Figures

FIGURE 44. A–D: Maladera sinobiloba Ahrens, Fabrizi & Liu, sp. n. (holotype); E–H: M. jizuana Ahrens, Fabrizi & Liu, sp. n. (holotype); I–L: M. habashanensis 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 111. Distribution of the Maladera indica group: Maladera bansongchana sp. n., M. habashanensis sp. n., M. huanianensis sp. n., M. jingdongensis sp. n., M. jizuana sp. n., M. kryschanowskii sp. n..