Maladera obscurata (Moser, 1915)

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 : 90-92

Maladera obscurata (Moser, 1915)

Figures 19 A–D, 96

Autoserica obscurata Moser, 1915: 354 .

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

Type material examined. Lectotype (here designated): ♂ “ China Yunnan / Autoserica obscurata ♂ Type Mos.” ( ZMHB) . Paralectotypes (here designated): 1 ♀ “ Yünnan China / Autoserica obscurata ♀ Type Mos.” ( ZMHB), 2 ♂♂ “ China Yunnan ” ( ZMHB) .

Additional material examined. China: 1 ♂ “Coll. R.I.Sc.N.B. Chine/ Sud Yunnan Tche-Ping-Tcheou/ Coll. P. Guerry Le Moult vendit” ( ISNB), 1 ex. (♂) “Yun-nan sen” ( ZFMK), 1 ♂ “China West Sichuan Moximian Luding Co. 13.-18.7.94 Benes” ( ZFMK), 6 ex. “China Yunnan 2000-3000m 27.20N 100.11E Habashan mts. SE slope 10- 13/7. Vit Kuban leg. 92” ( ZFMK), 1 ♂ “ Yunnan, 24-26 May Yulong Mts. 1993 27.01N 100.12E Bolm lgt. 3200m ” ( CP), 1 ♂ “ Yunnan, 23.-24. Jun Yulong Mts. 1993 27.00N 100.12E Bolm lgt. 3200M” ( CP), 1 ♂, 1 ♀ “China Yunnan Lijiang 2100m 13.-27.VI.1995 leg. Pekarovic” ( CP), 2 ♂♂ “China, Yunnan Lijiang 8-24.VI.1994 leg. B. Siska & T. Spevar” ( CP), 3 ♂♂, 3 ♀♀ “China VI.1990 Lijiang leg. Bocak” ( CP), 1 ♂ “China N. Yunnan Lijiang 2600 m 30.6.- 2.7.1990 L. & M. Bocák” ( ZFMK), 1 ♂ “China VI.1990 Lijiang leg. Bocák/ CS 38” ( CP), 1 ♂ “[China] Yunnan 2000-3000m 27.20N 100.11E Habashan mts. SE slope 10-13/7. Vit Kuban leg. 92” ( CP), 1 ♂ “ Yunnan 1500-3200m 26.07N 103.14E Dongchuan 28/6-3/7 Vit Kuban leg. 1994” ( CP), 1 ♂ “China; Yunnan, 1.-19.7. Heishui 1992 27.13N 100.19E E. Jendek leg.” ( CP), 1 ♂, 1 ♀ “China: Yunnan prov.; Daju- 50km N Lijiang; 27.21N 100.19E; S. Becvar leg.; 21.-27.vi.1993 ” ( CP), 1 ♂ “China, Yunnan Lijiang 25-27.VI.1994 leg. B. Siska & T. Spevar” ( CP), 2 ♂♂ “China, Yunnan prov. Daju- 50km N of Lijiang 27,21N; 100,19E 21.- 27.6.1993 lgt. S. Becvar” ( CP), 2 ♂♂ “China, Yunnan Dali 1-7.VI.1994 leg. B. Siska & T. Spevar” ( CP), 4 ♂♂ “China Yunnan, 6-10.VII. Ninglang env. 27.19N 100.55E lgt. S. Becvar 1992” ( CP), 1 ♂ “Yunnan-North 30km E Lijiang, N26°50[‘]-E100°24’ 2500m, 4.6.2006 V. Major leg.” ( CP), 7 ♂♂, 1 ♀ “China, NW Yunnan prov., Baishuitai, (San Ba terasses) 2600m, 4.-6.vi.2006, S. Murzin & I, Shokhin leg.” ( CP), 1 ♂, 1 ♀ “China-W. Sechuan Jinliang (Tcho-nin) 15- 20.6.2002 lgt. E. Kucera” ( CP), 1 ♀ “China-W Yunnan Sabe 28.6.- 1.7.2002 lgt. E. Kucera” ( CP), 1 ♀ “Ch-S Sichuan, 26-27.VI. road Xichang-Yanyuan, 1998 pass 15km SW Pingchuan 27.33N, 101.49E, cca 3200m Jaroslav Turna leg.” ( CP), 2 ♂♂, 1 ♀ “ Yunnan, 2000-3000m 27°20’N 100°11’E, Habashan Mts., SE slope, 10- 13.7.1992 D. Kral lgt.” ( NMPC), 4 ♂♂ “China-W Sechuan Jintiang (Tcho-nin) 15- 20.6.2002 lgt. E. Kucera” ( ZFMK), 1 ♀ “China—W. Yunnan Baishuitai 9- 10.7.2002 lgt. E. Kucera” ( ZFMK), 1 ♂ “Luguhu Lake, Ninglang County, Yunnan, 13-15.VII.2004, leg. Yuan Caixia, Li Jing” ( HBUM), 1 ♂ “Menghai, Xishuangbanna, Yunnan, 17.IV.1982, leg. Wang Sumei, Zhou Jingruo” ( MNAFU), 1 ♂ “Wengshui, Zhongdian, Yunnan, 10.VII.1982, 3000m, leg. Wang Shuyong” ( IZAS), 1 ♂ “Chuxiong, Yunnan, 7.V.1982, 2400m, leg. Liao Subai” ( IZAS), 1 ♂ “Moxi, Luding, Sichuan, 6.VIII.2004, 1600m, leg. Bai Ming, Xue Huaijun” ( IZAS), 1 ♂, 1 ♀ “Wengshui, Zhongdian, Yunnan, 10.VII.1982, 3000m, leg. Zhang Xuezhong” ( IZAS), 1 ♂ “Dongjiafen, Jingdong, Yunnan, 21.V.1956, leg. Kryschanowski” ( IZAS), 1 ♂ “Lijiang (Yunnan), 1989, No.304” ( IZAS), 1 ♂ “Derong, Sichuan, 13-14.VIII.2008, 2309m, leg. Gao Zhenhua, Zhou Yong” ( HBUM), 1 ♂ “China: Yunnan province, 2.5km SW of Haba, 19.VI.2007, Haba Xueshan Mts., 27°22.4’N 100°06.7’E, 3100m, J. Hajek & J. Ruzicka leg. [Ch37]/X-DA1636” ( ZFMK), 14 ex. “China: Sichuan Prov., Moxi env. Hailuogou valley, Gonghe vill., 1715m, 29°37‘27‘‘N 102°06‘28‘‘E, / 17.-21.VI.2014 at light, in front of hotel, ruderals close to margin of mixed forest, J. Hajek, J. Ruzicka & M. Thoc leg.” ( NMPC). Laos: 1 ex. “Laos-NE Hua Phan prov., 20°12’N, 104°01 ’E, Phu Phan Mt., 1500-1900m, 17.5.- 3.6.2007, leg. Vit Kuban” ( ZFMK), 2 ex. “NE-Laos: Hua Phan prov., Ban Saleui, Phou Pan (Mt.) - 20°12’N, 104°01 ’E; 11.iv.-15.v.2012; 1300-1900m; leg. C. Holzschuh Ankauf ZFMK Bonn 2012” ( ZFMK), 2 ex. “NE-Laos: Hua Phan prov., Ban Saleui, Phou Pan (Mt.) - 20°12’N, 104°01 ’E; 14.iv.-15.v.2012; 1300-1900m; leg. C. Holzschuh Ankauf ZFMK Bonn 2012/13” ( ZFMK), 1 ♂ “X-DA5064 Laos Hua Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12’N, 104°01 ’ 15.-30.iv.2014 leg. C. Hol-zschuh—ZFMK Ankauf 2014 Maladera spLaos_Phupane24” ( ZFMK), 1 ♂ “X-DA4730 Laos Hua Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12’N, 104°01 ’ 15.-30.iv.2014 leg. C. Holzschuh—ZFMK Ankauf 2014 Maladera obscurata cf” ( ZFMK), 1 ♂ “X-DA4839 Laos Hua Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12’N, 104°01 ’ 15.- 30.iv.2014 leg. C. Holzschuh—ZFMK Ankauf 2014 Maladera spLaos_Phupane24” ( ZFMK), 1 ♂ “X-DA4837 Laos Hua Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12’N, 104°01 ’ 15.-30.iv.2014 leg. C. Holzschuh—ZFMK Ankauf 2014 Maladera spLaos_Phupane24” ( ZFMK), 1 ♂ “X-DA4838 Laos Hua Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12’N, 104°01 ’ 15.-30.iv.2014 leg. C. Holzschuh—ZFMK Ankauf 2014 Maladera spLaos_Phupane24” ( ZFMK), 1 ♂ “X-DA4979 Laos Hua Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12’N, 104°01 ’ 15.-30.iv.2014 leg. C. Hol-zschuh—ZFMK Ankauf 2014 Maladera spLaos_Phupane24” ( ZFMK). Thailand: 1 ♂ “Thailand, 1000-1600m Chiang Mai prov. 20Km NW of Fang, 2.-5.v.1996 lgt. S. & E. Becvar” ( CP).

Specimens without basal lobe: 1 ♂ “ China: Yunnan NW, 3600-3700m Yulongshan Mt. 14.-22.VI.1998 S. Murzin leg.” ( ZFMK) , 1 ♂ “ China: Yunnan, Tiger Leaping Gorge 2000-3100m, 10-12.VI.1998 leg. S. Murzin ” ( ZFMK) , 1 ♂ “ China: Yunnan, Baoshan env. h= 2000m 15.vii.2000 ” ( ZFMK) , 1 ♀ “ China, N. Yunnan Lijiang 27.- 28.vi.1996 local collector” ( ZFMK) .

Redescription. Length: 6.6 mm, length of elytra: 4.2 mm, width: 3.8 mm. Body oval, black, antenna yellow, club brown, dorsal surface dull and weak iridescent shine, except some single setae on head dorsal surface nearly glabrous.

Labroclypeus moderately wide and trapezoidal, shiny, widest at base, lateral margins weakly convex and strongly convergent anteriorly, anterior angles blunt and slightly reflexed, anterior margin moderately emarginate, margins moderately reflexed; lateral margin and ocular canthus produce a blunt angle; surface flat, finely and densely punctate, with numerous erect setae anteriorly; frontoclypeal suture indistinctly incised, curved; smooth area anterior to eye flat, as wide as long; ocular canthus long and moderately wide (nearly 1/2 of ocular diameter), finely and sparsely punctate, with a terminal seta. Frons dull, with fine, dense punctures and a few single erect setae beside eyes. Eyes small, ratio diameter/ interocular width: 0.4. Antenna with ten antennomeres; club with three antennomeres and weakly reflexed, as long as remaining antennomeres combined. Mentum elevated and slightly flattened anteriorly.

Pronotum moderately transverse, widest at base, lateral margins in basal half nearly straight and subparallel, in anterior half evenly convex and moderately convergent anteriorly, anterior angles moderately produced and rightangled, posterior angles blunt, weakly rounded at tip; anterior margin weakly convex, with fine and complete marginal line, base without marginal line; surface finely and densely punctate, with minute setae in punctures, otherwise glabrous; lateral and anterior margin finely setose; hypomeron carinate, not produced ventrally. Scutellum wide, triangular, dull, with fine, sparse punctures.

Elytra widest shortly behind middle, striae distinctly impressed, finely and sparsely punctate, intervals weakly convex, with fine and sparse punctures concentrated along striae, with minute setae in punctures, odd intervals with a few single short setae; epipleural margin robust, ending at strongly curved external apical angle of elytra, epipleura densely setose; apical border of elytra not membraneous, without visible rim of microtrichomes (at ca 100x magnification).

Ventral surface dull, coarsely and moderately densely punctate, metasternum sparsely covered with sparse fine setae; metacoxa with a few longer setae laterally, otherwise glabrous. Abdominal sternites finely and irregularly densely punctate, glabrous, each sternite with a transverse row of coarse punctures each bearing a robust long seta. Mesosternum between mesocoxae as wide as mesofemur. Ratio of length of metepisternum/metacoxa: 1/1.6. Pygidium moderately convex and dull, coarsely and densely punctate, without smooth midline, with short setae throughout and a few longer setae on apical half.

Legs moderately wide and short, weakly shiny; femora with two longitudinal rows of setae, finely and sparsely punctate. Metafemur dull, with anterior margin acute, with continuous serrated line behind anterior margin, setae of anterior row very short; posterior margin smooth and moderately widened at apex ventrally, not serrate dorsally, with just a few short setae basally. Metatibia short, widest at apex, ratio of width/length: 1/3.3, sharply carinate dorsally, with two groups of spines, basal group shortly before middle, apical group at three quarters of metatibial length, with a few short robust setae basally and a short serrated line beside dorsal margin in basal quarter; lateral face weakly longitudinally convex, sparsely punctate on base and ventral portion, with minute setae in punctures; ventral margin finely serrate, with four robust setae of which the apical one is more distant; medial face smooth and glabrous; apex finely serrate, moderately truncate interiorly near tarsal articulation. Tarsomeres dorsally smooth and glabrous, neither laterally nor dorsally carinate, sparsely setose ventrally; metatarsomeres with a strongly serrated ridge ventrally and a smooth subventral longitudinal carina; first metatarsomere slightly shorter than following two tarsomeres combined and slightly longer than dorsal tibial spur. Protibia short, bidentate; anterior claws symmetrical, basal tooth of both claws bluntly truncate at apex.

Aedeagus: Fig. 19 A–C. Habitus: Fig. 19D .

Remarks. The extension of the basal lobes of the parameres exhibit considerable variation within local populations, but the shape of the rest of the paramere remains uniform.. It is very likely that all these forms belong to a single species.

Distribution. See map ( Fig. 96 ) and Table 1.

Figures

FIGURE 19. A–D: Maladera obscurata (Moser, 1915) (China: Yunnan: Haba Xueshan Mts.); E–H: M. paraobscurata Ahrens, Fabrizi & Liu, sp. n. (holotype); I–L: M. piceola (Moser, 1915) (China: Yunnan). 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 96. Distribution of the Maladera teizoana group: Maladera longruiensis sp. n., M. obscurata (Moser, 1915), M. parobscurata sp. n., M. saitoi (Niijima & Kinoshita, 1927), M. shengqiaoae sp. n..