Maladera parva ( Moser, 1908 )

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 : 324-326

Maladera parva ( Moser, 1908)

Figures 77 A–D, 130

Cephaloserica parva Moser, 1908: 326 ; Ahrens 2002: 71.

Maladera parva: Ahrens 2006b: 237 ; 2007b: 24.

Cephaloserica kojimai Miyake, 1991: 9 , syn. by Ahrens 2002: 71.

Type material examined. See Ahrens (2002).

Additional material examined. China: 2 ♂♂, 1 ♀ “ Menglun , Yunnan, 19.V.1991, leg. Wang Yinglun, Tian Binggang ” ( MNAFU) , 1 ♂, 1 ♀ “ Mt. Yanshan , Guangxi, 30.V.1963, leg. Yang Jikun ” ( CAU) , 2 ♀♀ “Fukien, S. China Shaowu City 1942, 26.VI. T. Maa ” ( BMH) , 1 ♂ “ Fukien S. China Yungan, Siying pan 16.V.1942 T.C. Maa ” ( BMH) , 1 ♂ “ Fukien S. China Yungan, Siying pan 1.VII.1940 T.C. Maa ” ( BMH) . Vietnam: 20 ex. “N-Vietnam Thai Nguyen Prov., vic Ngoc Thanh, Me Linh (IEBR station), 12.V.2012, 21°23’3’’N, 105°42’44’’E, 60-80m, leg. A. Skale ” ( CASH) , 7 ex. “Museum Paris Tonkin Langue 1886” ( MNHN) . Thailand: 1 ♂ “THAI 11-15.V.1993 Nan-Pha-Khab Pacholátko & Dembicky leg.” ( CP) . Laos: 1 ♂ “ Laos , 31.v.1997 Louangnamtha pr. 21°00’N 101°25’E Louang Namtha Vit Kuban leg., 600m ” ( CP) .

Redescription. Length: 5.6 mm, length of elytra: 4.1 mm, width: 3.4 mm. Body short-oval, reddish to dark brown and shiny; antenna yellow, dorsal surface glabrous.

Labroclypeus subtrapezoidal, widest at base, lateral margins weakly convex and strongly convergent to moderately rounded anterior angles, lateral margin and ocular canthus producing a blunt angle; margins distinctly reflexed, anteriorly distinctly emarginate medially; surface flat, finely and densely punctate, with a few long, erect setae anteriorly; frontoclypeal suture weakly impressed and moderately curved; smooth area in front of eye approximately 1.5 times as wide as long; ocular canthus short and moderately wide, finely punctate, with one terminal seta. Frons with fine, dense punctures, with a few single setae beside eyes. Eyes moderately large, ratio of diameter/interocular width: 0.6. Antenna with 10 antennomeres; club with three antennomeres, little shorter than remaining antennomeres combined. Mentum anteriorly elevated and flattened.

Pronotum subtrapezoidal, widest at base, lateral margins strongly convex and 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 densely setose. Scutellum wide and dull, triangular, with fine and dense punctures.

Elytra oblong, widest at middle, striae finely impressed, finely and densely punctate, intervals weakly convex, with fine, dense punctures concentrated along striae, glabrous; epipleural margin robust, ending at blunt external apical angle of elytra, apex of elytra concavely trunctae; 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: 1/1.47. 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 a quarter as long as sternite. Pygidium moderately convex, finely and densely punctate, without smooth midline, with a few long setae along apical margin.

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: 1/2.55, dorsal margin sharply 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 equidistant spines; 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 little shorter than following two tarsomeres combined and little longer than dorsal tibial spur. Protibia short, bidentate, moderately long. Protarsal claws symmetric.

Aedeagus: Fig. 77 A–C. Habitus: Fig. 77D .

Distribution. See map ( Fig. 130 ) and Table 1.

Figures

FIGURE 77. A–D: Maladera parva (Moser, 1908) (Paralectotype: Central Tonkin, Chiem Hoa); E–H: M. punctulata (Frey, 1972). 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 130. Distribution of Maladera species with uncertain systematic status: Maladera panyuensis sp. n., M. parva (Moser, 1908), Maladera punctulata (Frey, 1972), M. rotunda (Arrow, 1946), M. tibialis (Brenske, 1898), M. trifidiforceps sp. n., M. wandingana sp. n.