Maladera rufodorsata ( Fairmaire, 1888 ) Fabrizi & Liu & Bai & Yang & Ahrens, 2021

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 : 121-124

Maladera rufodorsata ( Fairmaire, 1888) comb. n.

Figures 26 A–D, 99

Homaloplia rufodorsata Fairmaire, 1888 a: 19 .

Autoserica rufodorsata: Brenske 1902: 49 .

Maladera rufodorsata: Ahrens 2004a: 205, 2007b: 24 ; Ahrens & Fabrizi 2016: 138.

Type material examined. Syntypes ( rufodorsata ): 1 ♂ “ Homaloplia rufodorsata Fairmaire Kiangsi / 112/ Museum Paris 1904 Coll. Leon Fairmaire ” ( MNHN) , 1 ♂, 3 ♀♀ “ Homaloplia rufodorsata Fairmaire Kiangsi [handwritten Fairmaire]/ 112/ Museum Paris Coll. Léon Fairmaire ” ( MNHN, ♂ with original labels, ♀♀ at the same pin, subsequently labelled by us), 3 ♂♂, 1 ♀ “Yunan/ Museum Paris 1906 Coll. Léon Fairmaire ” ( MNHN, 1 ♂ with original labels, 2 ♂♂, 1 ♀, at the same pin, subsequently labelled by us), 1 ♂ “Yunan” ( MNHN) . Syntypes ( satrapa ): 1 ♀ “Carin Asciuti Ghecù 1400-1500 m. L. Fea III-IV.88/ Serica satrapa Typ. Brsk. / Coll. Brenske ” ( ZMHB), 2 ♂♂, 1 ♀ “Carin Cheba 900-1100 m L. Fea V.XII-88/ Serica satrapa Typ. Brsk. ” ( MSNG) .

Additional material examined. China: 5 ex. “ Coll. R. I. Sc. N. B. Chine Yunnan fou/ R. Ley coll. Le Moult vendit” ( ISNB), 12 ex. “ Coll. R. I. Sc. N. B. Chine / Tchao Pin-io China Le Moult vendit” ( ISNB), 5 ex. (♀) “Yünnan China” ( ZMHB, CF), 1 ex. “ Yunnan ” ( ZMHB), 1 ex. “ China Yunnan ” ( ZMHB), 4 ex. “Tchao Pin Io Chine” ( ZMHB), 1 ex. “ Coll.R.I.Sc.N.B. Chine / Yunnan Sen/ Coll. P. Guerry Le Moult vendit” ( ISNB), 3 ex. “ Coll.R.I.Sc. N.B. Chine / Sud Yunnan Tche-Ping-Tcheou/ Coll. P. Guerry Le Moult vendit” ( ISNB), 2 ex. “ Coll.R.I.Sc.N.B. Chine / Hang-Kia-Pin alt. 1400 m Ouest Yunnan / Coll. P. Guerry Le Moult vendit” ( ISNB), 1 ex. “ Coll.R.I.Sc. N.B. Chine / Dji-Lou-La alt. 1200 m. Nord Ouest Yunnan / Coll. P. Guerry Le Moult vendit” ( ISNB), 1 ex. “ China. Prov. Yunnan. Vallis flumin, Soling-ho./ Brit. Mus. 1947-67” ( BMNH), 1 ex. “ China, W. Yunnan Tengchong env. 10-13.VI.1993 E. Jendek & O. Šauša leg./ CS 75” ( CPPB), 40 ex. “ China-Yunnan env. Tengchong 10.- 13.6.1993 E. Jendek & O. Šauša leg. [sic]” ( NHMW), 12 ex. “Yunan” ( MNHN), 22 ex. “Yunan” ( MNHN), 50 ex. “ Chine Yunnan Rec. de Lou-Nan 1931” ( MNHN), 4 ex. “ Chine Kouy-Tchéou R.P.J. Esquirol 1918” ( MNHN), Kouy-Tchéou R.P.J.R. Chaffanjen 1903” ( MNHN), 3 ex. “Museum Paris, Kouy-Tchéou, Rég. de Pin-Fa, Pére Cavalerie 1908” ( MNHN), 4 ex. “Museum Paris, Kouy-Tchéou, Pére Cavalerie 1910” ( MNHN), 5 ex. “ China, W Yunnan Tengchong env. 10-13.VI.1993 E. Jendek & O. Šauša leg.” ( CP), 1 ex. “ S China, Yunnan prov., mts. 20km SW Baoshan , 2400m, 23.-25.v.2006 leg. S. Murzin & I. Shokin ” ( CP), 1 ♂ “ Dongjiafen, Jingdong, Yunnan, 20.VI.1956, 1250m, leg. А. Schnitnikov ” ( IZAS), 1 ♀ “ Menghun , Xishuangbanna , Yunnan, 13.VI. 1958, 650m, leg. Zheng Leyi ” ( IZAS), 1 ♂ “ Meng’e, Xishuangbanna , Yunnan, 23.V.1958, 1050- 1080m, leg. Zhang Yiran ” ( IZAS), 1 ♂ “ Hedongjie, Jingdong, Yunnan, 29.IV.1957, leg. Zhu Zeng ” ( IZAS), 2 ♂♂ “ Menghai , Yunnan, 17.IV.1982, leg. Wang Sumei, Zhou Jingruo” ( MNAFU). Laos: 2 ex. “ Xim Khonang 20.IV.60 Laos (Bandon)” ( MNHN), 1 ex. (♂) “ Laos , 10-16.v.1999 Louangphrabang pr. 20°33‘-4‘N 102°14‘E, BanSongCha (5 km W), 1200 m, Vit Kuban leg.” ( CPPB), 10 ♀♀ “ Laos N, 24.iv.-16.v.1999, Louang Phrabang prov. , 20°33‘ N, 102°14‘ E, Ban Song Cha (5km W), 1200 m, C. Holzschuch leg.” ( CPPB), 2 ♂♂ “ Laos , Phongsaly prov., 21°41‘ N 102°6-8‘ E, 28.v.-20.vi.2003, Phongsaly env., ~ 1500m, Pacholátko leg.” ( CPPB), 3 ex. “ Laos : Xieng Khouang 17.v.1995 ” ( ZFMK), 8 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), 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), 1 ♂ “X-DA5011 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 rufodorsata ” ( ZFMK), 1 ♂ “X-DA4851 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 rufodorsata ” ( ZFMK), 1 ♂ “X-DA4713 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 rufodorsata ” ( ZFMK). Myanmar: 6 ex. “ Maymyo, Burma H.L. Andrewes/ Andrewes Bequest B.M. 1922-221/ Maymyo VI.10 H.L. Andrewes” ( BMNH), 1 ex. (♀) “ Birmah Karen Mts. / Doherty / Fry Coll. 1900.100.” ( BMNH), 3 ex. (♀) “ Birmah Ruby Mnes. / Doherty / Fry Coll. 1900.100.” ( BMNH), 10 ex. “ Hte. Birmanie Mines des Rubies , 1200-2300 m, Doherty 1890” ( MNHN), 11 ex. “ Birmah Ruby Mines / Doherty/ Fry Coll. 1950.100” ( BMNH), 1 ex. “ Burma Myindaik 4500 ft. 5.V.18/ India T. B. Fletcher B.M. 1943-9.” ( BMNH), 1 ex. (♀) “ Birmah Momeit / Doherty / Fry Coll. 1905.100” ( BMNH), 1 ♀ “N. Chin Hills Burma 94-4” ( BMNH). Thailand. 1 ex. (♂) “Thai-N, 1.- 19.5.1998 Chiang Mai prov. Ban San Pakia, Bednarik leg., 1400 m ” ( CPPB) .

Redescription. Length: 5.2 mm, length of elytra: 3.6 mm, width: 3.4 mm. Body short oval; bicoloured, ventral side, head, nterior pronotum, scutellum and margins of elytra black, legs, antenna, elytra and basal part of pronotum yellowish brown, dark parts sometimes with greenish shine; dorsal surface except head, tibiae, and tarsi dull, nearly glabrous.

Labroclypeus wide, weakly trapezoidal, widest at base, lateral margins strongly convex and convergent anteriorly, separated by a distinct angle from ocular canthus, slightly incised at transition to labrum; anterior angles moderately convex, slightly elevated; anterior margin slightly emarginate medially, margins moderately reflexed, anterior angles and midpoint of anterio margin tooth-like produced (see from posterior); surface weakly convex medially, coarsely densely punctate, with numerous larger punctures each bearing an erect seta. Frontoclypeal suture finely incised, weakly curved. Smooth area in front of eyes as wide as long, strongly punctate near eyes. Ocular canthus short and wide, externally convex, very finely and densely punctate, terminal seta absent. Frons dull, finely and moderately densely punctate, posterior head, beside eyes as well as on posterior quarter very densely and coarsely punctate, beside eyes with a few single erect setae, otherwise with microscopic setae in punctures only. Eyes small, ratio diameter/interocular width: 0.39. Antenna with nine antennomeres, club with three antennomeres, as long as remaining antennomeres combined and straight. Mentum convexly elevated, anteriorly slightly flattened.

Pronotum widest at posterior third, anterior angles moderately sharp and well produced, posterior angles strongly convex, obsolete; anterior margin with fine and complete marginal line, weakly convexly produced medially; lateral margins strongly convex and convergent anteriorly and posteriorly, immediately behind anterior angles convex; surface finely and densely punctate, with microscopic setae in punctures, otherwise glabrous, anterior and lateral margins with sparse but robust setae. Colour black, in basal half more or less widely yellowish, basal and lateral margins always dark. Scutellum dark or yellowish, narrowly triangular, with fine and moderately dense punctures, with microscopic setae in punctures.

Elytra wide, wides shortly behind middle, external apical angle widely rounded, yellowish brown, base, sutural interval, apical margin and external intervals dark, striae finely impressed, finely sparsely punctate, intervals very weakly convex or flat, sparse and fine punctures concentrated along striae, odd intervals with a few single short setae, near humerus with a single long seta, otherwise only with microscopic setae in punctures. Epipleural margin robust, ending at external apical angle of elytra; apical margin chitinous, without rim of microtrichomes (visible at ca 100x magnification).

Ventral face with coarse and moderately dense punctures, sparsely setose, with a few robust setae on mesosternum and metasternal disc; otherwise with microscopic setae. Mesosternum between mesocoxae 1.5 times as wide as mesofemur. Metacoxa glabrous except a few robust setae laterally. Abdominal sternites dull, finely densely punctate, with a row of robust punctures each bearing a robust seta. Ratio of length of metepisternum/metacoxa: 1/1.65. Pygidium dull, in male mostly dark, weakly convex ad moderately dense punctate, apical margin with a few single long setae, otherwise only with microscopic setae.

Legs moderately wide; femora finely and very sparsely punctate, with two longitudinal rows of setae. Metafemur moderately shiny, anterior margin acute, without adjacent serrated line; posterior ventral margin almost straight, distinctly widened in apical half, neither ventrally nor dorsally serrated but smooth, glabrous. Metatibia short and moderately wide, sides subparallel, basally narrowed, ratio width/length: 1/2.9; dorsal margin weakly carinate, with two groups of spines, basal one at one third, apical one at three quarters of metatibial length; lateral face strongly longitudinally convex, smooth, laterally with sparse and superficial punctures; ventral margin with three nearly equidistant robust setae; medial face smooth and glabrous, interiorly near tarsal articulation shallowly concavely emarginate. Tarsi glabrous dorsally, circular in cross section, metatarsomeres ventrally with a strongly serrated carina, subventrally with a second, smooth longitudinal carina, first metatarsomere slightly shorter than following two combined and little longer than the dorsal tibial spur. Protibia moderately long, bidentate; protarsal claws normal, symmetric.

Aedeagus: Fig. 26 A–C. Habitus: Fig. 26D .

Distribution. See map ( Fig. 99 ) and Table 1.

Figures

FIGURE 26. A–D: Maladera rufodorsata (Fairmaire, 1888) (China: Tchao Pin-io); E–H: M. sericella (Brenske, 1898) (India: Sikkim: Geyzing). 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 99. Distribution of the Maladera assamica group and of the M. marginella-group: Maladera rufodorsata (Fairmaire, 1888), M. sericella (Brenske, 1898).