Maladera secreta
Creators: name: Fabrizi, Silvia
name: Liu, Wan-Gang
name: Bai, Ming
name: Yang, Xing-Ke
name: Ahrens, Dirk
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melolonthidae
Maladera
Maladera secreta

description: Maladera secreta (Brenske, 1897)
Figures 3 A–E, 84
Autoserica secreta Brenske, 1897: 431; Niijima & Kinoshita 1923: 25.
Maladera secreta: Murayama 1938: 12; Nomura 1959: 40, 1963: 124, 1969: 80, 1973: 136, 1974: 112; Nakane & Baba 1960: 4; Kim & Lee 1997: 122; Ahrens 2006b: 234, 2007b: 19; Ahrens & Bezděk 2016: 291.
Autoserica takaoana Niijima & Kinoshita, 1927: 11, 80; syn by Nomura 1973: 136.
Autoserica uyei Niijima & Kinoshita, 1927: 12, 80; syn by Nomura 1973: 136.
Autoserica cruralis Frey, 1972a: 170.
Maladera cruralis: Ahrens 2006b: 234; 200b7: 19; Ahrens & Bezděk 2016: 291, syn. n.
Type material examined. Holotype (cruralis): ♂ “Kuatun (2300 m) 27,40 n.Br. 117,40 ö. L. J. Klapperich 29.4.1938 (Fukien)/ Type Autoserica cruralis G. Frey 1972 ” (ZMFK). Paratypes (cruralis): 1 ♂ “Kuatun (2300 m) 27,40 n.Br. 117,40 ö. L. J. Klapperich 19.4.1938 (Fukien)/ Paratype Autoserica cruralis G. Frey 1972 ” (ZMFK), 1 ♂ “Kuatun (2300 m) 27,40 n.Br. 117,40 ö. L. J. Klapperich 20.7.1938 (Fukien)/ Paratype Autoserica cruralis G. Frey 1972 ” (CF), 1 ♀ “Kuatun (2300 m) 27,40 n.Br. 117,40 ö. L. J. Klapperich 15.7.1938 (Fukien)/ Paratype Autoserica cruralis G. Frey 1972 ” (ZMFK).
Additional material examined. China: 1 ex. “ Chine 16.VII.46 Kuatun, Fukien leg. Tschung-Sen ” (MHNG), 1 ex. “ Chine 22.VII.46 Kuatun, Fukien leg. Tschung-Sen ” (MHNG), 1 ex. “ Chine 24.VII.46 Kuatun, Fukien leg. Tschung-Sen ” (MHNG), 4 ex. “ China prov. Fujian bor. occ. Shaowu env. 25 km road Shaowu-Taining 5.–10.7. M. Nikodým lgt. 1991“ (CN, CA), 1 ex. “ China prov. Fujian bor. occ. Wuyi Gong 1.–3.7. M. Nikodým lgt. 1991“ (CN), 2 ex. “ China Fujian, Shaowu 19.– 23.7.1991 M. Nikodym leg.“ (NMPC), 1 ex. “ Kuatun, Fukien China, 15.7.46 leg. Tschung-Sen / ex. Coll. V. Balthasar National Museum Prague, Czech Republic ” (NMPC), 1 ♂ “China, W Hubei, 10.VII. Road Badong-Jianshi 30,8N 109,9E, ~ 1500m ~ 10km W Zhashuping Jaroslav Turna leg., 2003” (ZFMK), 2 ex “ China, Fujian c., 20.VI.–12.VII. Tianbaoyanshan, NW slopes 25°58’N 117°31’E, 1100m Jaroslav Turna leg., 2007” (ZFMK), 1 ex. “China, E Fujian, 25.VI.–17.VII. Jiaxianshan, 1350m, 25°42’N 118°07’E Jaroslav Turna leg., 2007” (ZFMK), 1 ex. “ Lushan, Jinjiang Jiang, XI, X-2003, leg. Wen ” (ZFMK), 1 ex. “ Datchulan China ‘39 T.H. Cheng / No. 00636 May 13, ‘35” (USNM), 1 ♂ “ Huangniushi, Mt. Jiulianshan, Jiangxi, 16.VI.1975, leg. Zhang Youwei ” (IZAS), 1 ♂ “ Taojiang, Leishan, Guizhou, 7.VII. 1998, 950m, leg. Wang Shuyong ” (IZAS), 1 ♂ “Nanping County, Shangsi, Guangxi, 11.VI. 2000, 350m, leg. Li Wenzhu ” (IZAS), 1 ♂ “ San’gang, Chong’anxingcun, Fujian, 18.VII.1960, 740– 910m, leg. Ma Chenglin ” (IZAS), 1 ♂ “ Shekou, Fu’an, Fujian, 24.VIII.1963 ” (IZAS), 1 ♂ “ Qixingqiao, Xingcun, Chong’an, Fujian, 19.VII. 1963, 840m, leg. Zhang Youwei ” (IZAS), 1 ♂ “ San’gang, Xingcun, Chong’an, Fujian, 1.VIII.1960, 740– 900m, leg. Ma Chenglin ” (IZAS), 1 ♂ “ Mts. Gutianshan, Zhejiang, 1–4.V.2010, 446– 715m, leg. Liu Chongling, No. G 24ha-112” (IZAS), 2 ♀♀ “ Mts. Gutianshan, Zhejiang, 24–27.V. 2010, 435,502m, leg. Liu Chongling, No. G 45-GE11,G45-FI8” (IZAS), 1 ♀ “ Mts. Gutianshan, Zhejiang, 30.IV–3.V. 2010, 298m, leg. Liu Chongling, No. S 15-14” (IZAS), 1 ♂ “ Aotou, Huangkeng, Jianyang, Fujian, 6.V, 8.VIII.1960, 650– 950m, 800–950m, leg. Jiang Shengqiao ” (IZAS), 1 ♂ “ China, NE Jiangxi prov. Wufugang, 1100–1200m E slopes, 27°59’N 118°02’E Jatua leg., 21.V.–21.VI.2013 ” (ZFMK), 1 ♂ “ China, NE Jiangxi, 29.IV.–27. V. Wufugang, 1149–1500m E slopes, 27°59’N 118°02’E Jaroslav Turna leg., 2010” (ZFMK), 1 ♂ “China, cent. Zheijang, 15.V.–21.VI. N of Jinhua Dapanshan 1100m, 29°13’N 119°39’E Jaroslav Turna leg., 2011” (ZFMK), 1 ♂ “ China, W Zheijang, 1.–29. V. Qianjiang, 720–950m for. Park, 29°23’N 118°12’E Jaroslav Turna leg. 2010” (ZFMK), 1 ♂ “ China: Zhejiang, Lin’an City, Danming Shan, 30°02’04’’N, 118°59’14’’E, light trap, 860 m, 7.VII.2014 ” (SNUC), 1 ♂ “ Foping County Shaanxi Prov. alt. 850–950m 20-VII-2004 Hu, Tang, Zhu leg.” (SNUC). Japan: 1 ♂ “ Mt. Daimonji, Kyoto, 23.V.1931, leg. K. Eki ” (IZAS), 1 ♂ “ Japan / W.H. Muche Radeberg, Ankauf” (SMTD), 1 ♂ “ Kaya-Sakaidani, Sankyo-mura Miyosa-gun, Awa, Sikoku Japan, 3.6. 48 M. Chujo” (ZFMK), 1 ♂ “ Mt. Otaki (700m) Kagawo-ken Shikoku, Japan 11.VI.1950 Coll. M. Chujo ” (ZFMK), 2 ♂♂ “Hibosashi Hirado” (ZMHB). Vietnam: 1 ♂ “ Tonkin Montes Mauson April, Mai 2–3000‘ H. Fruhstorfer “ (ZMHB).
Redescription. Length: 9.1 mm, length of elytra: 6.6 mm, width: 5.6 mm. Body oblong, reddish brown, antenna yellowish, surface dull, anterior labroclypeus shiny, except a few short setae on head and sides of elytra, glabrous.
Labroclypeus wide and subtrapezoidal, widest at base, lateral margins moderately convex and convergent anteriorly, anterior angles moderately rounded; anterior margin weakly emarginate medially; margins moderately reflexed; lateral margin and ocular canthus produce an indistinct angle; surface basally dull, weakly convex medially, finely, densely punctate, with a few single erect setae on anterior third; frontoclypeal suture finely 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 sparsely punctate, terminal seta present. Frons with moderately dense, irregular, fine punctures, with a few single setae beside eyes. Eyes small, ratio diameter/ interocular width: 0.5. Antenna with ten antennomeres; club with three antennomeres and straight, as long as remaining antennomeres combined. Mentum elevated and slightly flattened anteriorly.
Pronotum narrow, widest at base, lateral margins in basal half nearly straight and distinctly convergent anteriorly, in anterior third weakly convex and convergent anteriorly, anterior angles distinctly produced and sharp, posterior angles blunt; anterior margin weakly convex, with fine marginal line being medially widely interrupted, base without marginal line; surface finely and densely punctate, with minute setae in punctures; anterior and lateral margin sparsely finely setose; hypomeron carinate, not produced ventrally. Scutellum wide, triangular, with fine and dense punctures.
Elytra widest at middle, striae finely impressed, finely and densely punctate, intervals weakly convex, with fine, moderately dense punctures, penultimate interval with a few single short, erect setae, otherwise with minute setae in punctures; epipleural margin robust, ending at convex external apical angle of elytra, epipleura sparsely setose; apical border of elytra broadly membraneous, with a robust rim of microtrichomes (visible at ca 100x magnification).
Ventral surface dull, finely and densely punctate, nearly glabrous, metasternal disc sparsely covered with longer erect setae; metacoxa with minute setae in punctures and 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: 1/1.73. Pygidium strongly convex, dull, finely and densely punctate, without smooth midline, with a few long setae along apical margin.
Legs moderately long and wide; femora shiny, with two longitudinal rows of setae, finely and sparsely punctate. Anterior margin of metafemur acute, serrated; posterior ventral margin smooth and in apical half concave, distinctly widened at apex, apex with a blunt angle, dorsal posterior margin smooth, neither serrate, glabrous. Metatibia long and moderately wide, widest at middle, ratio of width/length: 1/2.1, 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 serrated line beside dorsal margin and few short single spines close to dorsal margin; lateral face longitudinally convex, finely densely punctate, with minute setae in punctures; ventral margin finely serrate, with five robust equidistant setae; medial face smooth and glabrous; apex finely serrate, very shallowly emarginate interiorly near tarsal articulation. Tarsomeres dorsally impunctate, glabrous, neither laterally nor dorsally carinate, moderately setose ventrally; metatarsomeres glabrous and with a strongly serrated ridge ventrally and a smooth subventral longitudinal carina; first metatarsomere slightly shorter than 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. 3 A–D. Habitus: Fig. 3E.
Remarks. Maladera secreta (Brenske) was originally described from Japan; the holotype of Maladera cruralis (Frey) and the Japanese populations of M. secreta, however, are virtually identical in shape of aedeagus, therefore we consider them synonymous.
Distribution. See map (Fig. 84) and Table 1.
description: Published as part of 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), pp. 1-400 in Zootaxa 4922 (1) on pages 22-24, DOI: 10.11646/zootaxa.4922.1.1, http://zenodo.org/record/4496316