Maladera kryschanowskii 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 : 209-211

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

Figures 48 A–D, 111

Type material examined. Holotype: ♂ “[ China] Mangshi , Yunnan, 1955 V.17., 900m, leg. Kryschanowski / LW- 874” ( IZAS) . Paratypes: 1 ♂ “[ China] Mangshi , Yunnan, 1955 V.17., 900m, leg. Kryschanowski ” ( IZAS) , 1 ♂ “[ China] Mangshi , Yunnan, 1955 V.16., 900m, leg. Kryschanowski ” ( ZFMK) .

Description. Length: 6.5 mm, length of elytra: 4.4 mm, width: 3.8 mm. Body oblong-oval, yellowish brown, dull, antenna yellow, head shiny, except some single setae on head dorsal surface nearly glabrous.

Labroclypeus wide and subtrapezoidal, widest at base, lateral margins convex and distinctly convergent anteriorly, anterior angles sharply dentate, anterior margin emarginate medially, and strongly reflexed at middle, seen from posterior anterior margin tridentate; lateral margin distinctly incised before labroclypeus; lateral margin and ocular canthus produce a blunt angle; surface flat, finely and densely punctate, with a few larger punctures each bearing an erect seta anteriorly; frontoclypeal suture indistinct, evenly curved; smooth area anterior to eye weakly convex, as wide as long; ocular canthus short and wide (1/4 of ocular diameter), finely and densely punctate, without a terminal seta. Frons completely but moderately shiny, with very dense, fine punctures, beside eyes with a few long setae. Eyes small, ratio diameter/ interocular width: 0.58. Antenna with ten antennomeres; club with three antennomeres and straight, slightly shorter than remaining antennomeres combined. Mentum elevated and slightly flattened anteriorly.

Pronotum transverse, widest shortly before base, lateral margins evenly convex and strongly convergent anteriorly, anterior angles distinctly produced and sharp, posterior angles strongly rounded; anterior margin straight, with complete and fine 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 finely impressed, finely and sparsely punctate, intervals weakly convex, with fine and sparse punctures concentrated along striae, with minute setae in punctures, penultimate interval with a very few single, short setae; epipleural margin robust, ending at weakly curved external apical angle of elytra, epipleura sparsely setose; apical border of elytra membraneous, with a wide membraneous 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: 1/1.45. Pygidium weakly convex and dull, coarsely and densely punctate, without impunctate midline, glabrous except a few short setae along apical margin.

Legs short 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 complete; posterior margin smooth, weakly widened at apex and smooth ventrally, not serrate dorsally, finely shortly setose. Tarsomeres dorsally impunctate, moderately setose ventrally; metatarsomeres with a strongly serrated ridge ventrally and a smooth subventral longitudinal carina, laterally and dorsally not carinate. Protibia short, bidentate; anterior claws symmetrical, basal tooth of both claws bluntly truncate at apex.

Aedeagus: Fig. 48 A–C. Habitus: Fig. 48D . Female unknown.

Diagnosis. Maladera kryschanowskii Ahrens, Fabrizi & Liu , sp. n. is rather similar to M. pallida (Burmeister) , but differs in lacking a basal lobe, and having the labroclypeus tridentate.

Etymology. The new species is named (noun in genitaive case) after its collector, Mr. Kryschanowski.

Variation. Length: 6.4–6.5 mm, length of elytra: 4.4–4.6 mm, width: 3.8–4.1 mm. Metatibia short and wide, widest at middle, ratio of width/length: 1/2.6, sharply carinate dorsally, with two groups of spines, basal group at one third, apical group at two thirds 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 four equidistant, short and robust setae; medial face smooth and glabrous; apex finely serrate, moderately truncate interiorly near tarsal articulation. First metatarsomere little shorter than following two tarsomeres combined and distinctly longer than dorsal tibial spur.

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

Figures

FIGURE 48. A–D: Maladera kryschanowskii Ahrens, Fabrizi & Liu, sp. n. (holotype); E–H: M. gibbiventris (Brenske, 1897) (China: Guizhou: Shibing); I–L: M. hunuguensis Ahrens, Fabrizi & Liu, sp. n. (holotype). A, E, I: aedeagus, left side lateral view; C, G, K: aedeagus, right side lateral view; B, F, B: 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..