Maladera lukjanovitschi ( Medvedev, 1966 )

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 : 328-330

Maladera lukjanovitschi ( Medvedev, 1966)

Figures 78 E–H, 129

Amaladera lukjanovitschi Medvedev, 1966: 1576 ; Januschev 1974: 117; Medvedev 1976: 164.

Maladera lukjanovitschi: Nikolaev 1977: 270 .

Maladera kaszabi Frey, 1967: 145 ; syn by Nikolaev 1977: 270.

Additional material examined: 4 ♂♂ “ China: Nei Mongol. Erlan , on light 21.VII.1990 L. & M. Bocak lgt.” ( NHMB) , 1 ♀ “ Ordos 1884 G. Patanin / Unicum N=16/ Brenske vid./ pallida hat 3zaehnigen Clypeus, matte Decken/ Serica No. 16 Brenske Berl. E.Z.97.407” ( DEIC) , 1 ♂ “ Xijiao Park , Beijing, 2.VII.1951, light trap, leg. Zhang Yiran ” ( IZAS) , 2 ♂♂ “ Gongzhufen , Beijing, 27.VI, 2.VII.1954, leg. Yang Jikun ” ( CAU) , 1 ♂ “ Zhunqi, Inner Mongolia, 30.VI.1978, leg. Chen Heming ” ( CAU) , 1 ♂ “ Daqi , Inner Mongolia, 4.VII.1978, leg. Chen Heming ” ( CAU) , 1 ♂ “ Yanchi , Ningxia, 21.VI.1989 ” ( HBUM) .

Redescription. Length: 6.2 mm, length of elytra: 4.1 mm, width: 3.5 mm. Body oblong-oval, yellowish brown and shiny; antenna yellow, dorsal surface glabrous.

Labroclypeus subtrapezoidal, widest at base, lateral margins weakly convex and moderately convergent to moderately rounded anterior angles, lateral margin and ocular canthus producing a blunt angle; margins distinctly reflexed, anteriorly shallowly emarginate medially; surface flat, shiny, finely and densely punctate, with few long, erect setae anteriorly; frontoclypeal suture weakly impressed and moderately curved; smooth area in front of eye approximately 2.5 times as wide as long; ocular canthus short and moderately wide, finely punctate, with one terminal seta. Frons with fine, dense punctures, glabrous. Eyes moderately large, ratio of diameter/interocular width: 0.64. Antenna with 10 antennomeres; club with three antennomeres, as long as remaining antennomeres combined. Mentum anteriorly elevated and flattened.

Pronotum subtrapezoidal, widest at base, lateral margins weakly convex and moderately convergent anteriorly; anterior angles weakly produced and sharp; posterior angles blunt; anterior margin moderately convexly produced medially, anterior marginal line fine and complete; surface finely and densely punctate; anterior and lateral margins sparsely setose. Scutellum wide and dull, triangular, with fine and dense punctures.

Elytra oblong, widest at middle, striae weakly impressed, finely and densely punctate, odd intervals weakly elevated, even ones flat, with fine, dense punctures, odd intervals with a few fine, erect, short setae; epipleural margin robust, ending at the strongly rounded external apical angle of elytra, epipleura densely setose; apical border chitinous, without a rim of short microtrichomes.

Ventral surface shiny, metasternum and metacoxa with fine and dense punctures, sparsely setose; metacoxa glabrous except for a several long setae laterally. Mesosternum between mesocoxae as wide as mesofemur. Ratio of length of metepisternum/metacoxa: 1/1.3. Abdominal sternites, in addition to fine and dense punctures, each with a distinct transverse row of punctures each bearing a short and fine seta, otherwise punctures with microscopic setae, penultimate sternite apically with a shiny smooth chitinous border, which is one third as long as sternite. Pygidium moderately convex, finely and densely punctate, without smooth midline, punctures with microscopic setae and with a few long setae on apical half.

Legs moderately wide and long; femora with two longitudinal rows of setae, finely and moderately densely punctate; metafemur shiny, anterior margin acute, lacking an adjacent serrated line; posterior ventral margin convex, weakly widened in apical half and smooth, dorsal posterior margin smooth, finely sparsely setose. Metatibia moderately wide and long, widest at apex, ratio width/length: 1/3.25, dorsally not carinate, with two group of spines, basal at one third, apical at two thirds of metatibial length; lateral face longitudinally convex, with sparse and fine punctures; ventral margin serrate, with three spines of which the distal stands more distant; medial face impunctate; apex interiorly near tarsal articulation shallowly concave. Tarsomeres impunctate dorsally, ventrally with sparse, short setae; metatarsomeres glabrous ventrally and with a strongly serrated ridge, beside which is not a strong longitudinal carina; first metatarsomere as long as following tarsomere and little longer than dorsal tibial spur. Protibia short, bidentate, moderately long. Protarsal claws symmetric.

Aedeagus: Fig. 78 E–G. Habitus: Fig. 78H .

Distribution. See map ( Fig. 129 ) and Table 1.

Figures

FIGURE 78. A–D: Maladera panyuensis Ahrens, Fabrizi & Liu, sp. n. (holotype); E–H: M. lukjanovitschi (Medvedev, 1966) (China: Nei Mongol.: Erlian). A, E: aedeagus, left side lateral view; C, G: aedeagus, right side lateral view; B, F: parameres, dorsal view; D, H: habitus. Scale: 0.5 mm. Habitus not to scale.

FIGURE 129. Distribution of Maladera species with uncertain systematic status: Maladera baishaoensis sp. n., M. hutiaoensis sp. n., M. jinggangshanica sp. n., M. lukjanovitschi (Medvedev, 1966), M. luoxiangensis sp. n., M. nabanensis sp. n., M. nanlingensis sp. n..