Maladera sontica ( Brenske, 1898 )

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 : 71-73

Maladera sontica ( Brenske, 1898)

Figures 14 F-J, 94

Autoserica sontica Brenske, 1898: 336 .

Maladera sontica: Ahrens 2004a: 287 .

Type material examined. Syntypes: 3 ♂♂ “ Hte Birmanie Mines des Rubies 1200 m- 2300 m Doherty 1890/ sontica type Brsk./ Mus. Paris ex. Coll. Oberth ̹r/ Type” ( MNHN) .

Additional material examined. Myanmar. 1 ex. “ Maymyo , Burma. A.K.W. Downing. B.M. 1923-324/ A.K. Weld Downing Burma / Autoserica perniciosa Brsk. Determined from description G.J.A.” ( BMNH) . Vietnam. 5 ex. “N-Vietnam, Prov. Lao Cai Sa Pa , 1600-1700 m, N22°19’52; E103°50’35; 23.-27.V.1999, leg. Ahrens, Jäger, Fabrizi ” ( ZFMK) , 3 ex. “ Vietnam, Lao Cai Prov., Sa Pa Distr. Fan Si Pan Mt., 1400-1500 m 26.V.-6.VI.1999 N.L. Orlov ” ( ZIN) , 2 ex. “N-Vietnam, Lao Cai Prov., Hoang Lien NP, Tram Ton , N22°21.197‘ E103°46.513‘, 1800-2050m 13.- 16.5.2015, leg. A. Skale ” ( CASH) . Thailand. 15 ex. “ Thailand: prov. Tak Regione di Umphang IV-VI.1991 H. Bomans legit (Mag. n. 1375)” ( MZF) , 1 ex. “THAI 28-31/5 1995 19.27N 98.20E Soppong 1500 m Vit Kubán leg.” ( CP) , 1 ex. “Thai-N, 1-15.v.1998, Chiang Mai prov., San Pakia vill., 19.19N 98.50E, 1400 m, Vit Kubán leg.” ( CP) , 1 ex. “N-Thailand 17.VII.1990 Doi Inthanon, leg. Malicky ” ( ZSM) . Laos. 2 ex. “ Laos, La Oudomxay 16.6.2005, ex. Coll. Sabatinelli ” ( ZFMK) , 1 ex. “ Laos, 21°09’N 101°19’E, Louangnamtha pr. Namtha-MuangSing , 5-31.v.1997, 900- 1200 m, Vit Kubán leg.” ( CP) , 1 ex. “ Laos north, 13-24.V.1997 15 km NW Louang Namtha N 21°07.5, E 101°21.0 alt. 750+ 100 m E. Jendek & O. Šauša leg.” ( CP) , 2 ex. “ Laos north, 13-24.V.1997 15 km NW Louang Namtha N 21°07.5, E 101°21.0 alt 750+ 100 m M. Strba & R. Hergovits leg.” ( CP) , 4 ex. “ Laos north, 24-30.V.1997 20 km NW Louang Namtha N 21°09.2, E 101°18.7 alt. 900+ 100 m E. Jendek & O. Šauša leg.” ( CP) , 2 ex. “ Laos north, 5-11.V.1997 20 km NW Louang Namtha N 21°09.2, E 101°18.7 alt. 900+ 100 m E. Jendek & O. Šauša leg.” ( CP) , 4 ex. “ Laos north, 5-11.V.1997 20 km NW Louang Namtha N 21°09.2, E 101°18.7 alt. 900+ 100 m M. Strba & R. Hergovits leg.” ( CP) , 1 ex. “ Laos bor., 900 m Louang Namtha 5- 30.5.1997 1000 m [sic], N21.09.2 E101.18.7” ( ZFMK) , 7 ex. “ Laos, 1.-16.v.1999, Louangphrabang pr., 20°33-4’N 102°14’E, Ban Song Cha (5km W), 1200 m, Vit Kubán leg.” ( CP) . China. 1 ex. (♂) “Chine-Yunnan PK 12 après Xima 24°49’N; 97°44’E alt. 2080 m / Muséum Paris 12.VI.2001 Deuve, Mantilleri, Rougerie & Tian leg.” ( MNHN) , 1 ex. “ China, Yunnan 14-21.VI.1993 100 km W of Baoshan Gaoligongshan nat. res. E. Jendek & O. Šauša leg.” ( CP) , 1 ex. (♂) “ China: E. Tibet, Tome, Tangmai , 2000 m, 30 km W of Donjung 12.- 13.6.1997 leg. A. Wrzecianka ” ( ZFMK) , 3 ex. “ China; Yunnan prov.; Gaoligongshan mts. ; 90 km W of Baoshan; S. Becvar leg.; 26.-29.v.1995 ” ( CP) , 1 ex. “ China: W-Sichuan, Aba Tibetan Aut. Pref. Weizhou Co., Qionglai Shan Wolong Valley , 20 km W Guanxiang, 1100 m, 31.04,55N, 103.26,38E, 14.VII.1999 leg. A. P̹tz” ( CAPE) , 1 ex. “ China: W-Sichuan Ya’an Pref., Shimian Co. Xiaoxiang Ling, Rd. Shimian-Ganluo , 20 km SE Shimian 29.05N, 102.29E, 1850 m 8.VII.1999, leg. A. P̹tz” ( CAPE) , 1 ♂ “ China, S. Yunnan Prov. Xinshuangbanna 20km NW Jinghong Man Diao ( NNNR) 720m, 22°07.80’N 100°40.05’E, 26.v.2008, light trap, leg. A. Weigel ” ( NME) , 1 ♂ “ Hansha , III.1981, No. 315” ( IZAS) , 1 ♂ “ Mengla Nature Researve , Yunnan, 4-5.VIII.2007, leg. Li Jiahui ” ( LSSYU) .

Redescription. Length: 7.8 mm, length of elytra: 5.5 mm, width: 4.5 mm. Body oblong-oval, reddish brown, antenna yellowish, surface dull, labroclypeus shiny, except a few short setae on sides of elytra, glabrous.

Labroclypeus wide and subtrapezoidal, widest at base, lateral margins nearly straight and convergent anteriorly, anterior angles strongly rounded, anterior margin weakly emarginate medially; margins moderately reflexed; lateral margin and ocular canthus produce an indistinct angle; surface flat, with an indistinct longitudinal elevation behind anterior margin, finely, densely punctate, glabrous; frontoclypeal suture distinctly incised, angled medially; smooth area anterior to eye convex, twice as wide as long; ocular canthus short and narrow (1/3 of ocular diameter), finely densely punctate, with a long terminal seta. Frons dull, with moderately dense, fine punctures, with a few single setae beside eyes. Eyes small, ratio diameter/ interocular width: 0.53. Antenna with ten antennomeres; club with three antennomeres and straight, as long as remaining antennomeres combined. Mentum elevated and slightly flattened anteriorly.

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

Elytra widest at posterior third, striae finely impressed, finely and densely punctate, intervals slightly convex, with fine, moderately dense punctures being except on second interval partly concentrated along striae, with minute setae in punctures and penultimate interval with a few short setae, otherwise glabrous; epipleural margin robust, ending at nearly blunt external apical angle of elytra, epipleura sparsely setose; apical border of elytra membraneous, with a fine rim of microtrichomes (visible at ca 100x magnification).

Ventral surface dull, finely and densely punctate, with dense and fine, adpressed setae, metasternal disc sparsely covered with longer 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: 1/1.6. Pygidium strongly convex, dull, finely and sparsely punctate, without smooth midline, with a few setae along apical margin.

Legs short and wide; femora dull, with two longitudinal rows of setae, finely and sparsely punctate. Anterior margin of metafemur acute, without adjacent serrated line, anterior row of setae completely reduced; posterior ventral margin smooth, moderately widened at ventral apex, dorsal posterior margin smooth, neither serrate, glabrous. Metatibia short and wide, widest at middle, ratio of width/length: 1/2.67, sharply carinate dorsally, with two groups of spines, basal group at middle, apical group at three quarters of metatibial length, in basal half with a few short single spines close to dorsal margin; lateral face longitudinally convex, nearly entirely impunctate, only a few fine punctures beside dorsal and ventral margin, glabrous; ventral margin finely serrate, with four equidistant robust setae; medial face smooth and glabrous; apex finely serrate, shallowly emarginate interiorly near tarsal articulation. Tarsomeres dorsally impunctate, glabrous, neither laterally nor dorsally carinate, moderately setose ventrally; metatarsomeres with a strongly serrated ridge ventrally and a smooth subventral longitudinal carina; first metatarsomere as long as following two tarsomeres combined and as long as dorsal tibial spur. Protibia moderately long, bidentate; anterior claws symmetrical, basal tooth of both claws bluntly truncate at apex.

Aedeagus: Fig. 14 F–I. Habitus: Fig. 14J .

Remarks. New record for China.

Distribution. See map ( Fig. 94 ) and Table 1.

Figures

FIGURE 14. A–E: Maladera perniciosa (Brenske, 1898) (Vietnam: Lao Cai: Sa Pa); F–J: M. sontica (Brenske, 1898) (Laos: Louangnamtha: Namtha); K–O: M. verticalis (Fairmaire, 1888b) (China: Shaanxi: Houzhenzi). A, F, K: aedeagus, left side lateral view; D, I, N: aedeagus, right side lateral view; B, G, L: aedeagus, dorsal view; C, H, M: left parameres, ventral view; E, J, O: habitus. Scale: 0.5 mm. Habitus not to scale.

FIGURE 94. Distribution of the subgenus Omaladera: Maladera sontica (Brenske, 1898), M. verticalis (Fairmaire, 1888), M. weni sp. n., M. wuliangshanensis sp. n., M. xingkei sp. n., M. yibini sp. n..