Serica adspersa ( Frey, 1972 ) Ahrens & Fabrizi & Bai & Liu, 2022

Ahrens, Dirk, Fabrizi, Silvia, Bai, Ming & Liu, Wangang, 2022, Taxonomic revision of Serica MacLeay, 1819 (sensu lato) from China and adjacent areas (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), with updates on Nipponoserica Nomura, 1972, Zootaxa 5186 (1), pp. 1-83 : 21-23

Serica adspersa ( Frey, 1972) new combination

Figures 4A–D , 21

Trichoserica adspersa Frey, 1972 a: 164 .

Type material examined. Holotype: ♂ “Kuatun (2300 m) 27,40 n.Br. 117,40 ö. L. J. Klapperich 19.5. 1938 (Fukien)/ Type Serica adspersa G. Frey 1972 ” ( ZMFK) . Paratypes: 1 ♀ “Kuatun (2300 m) 27,40 n.Br. 117,40 ö. L. J. Klapperich 19.5. 1938 (Fukien)/ Paratype Serica adspersa G. Frey 1972 ” ( ZMFK) , 1 ♀ “Kuatun (2300 m) 27,40 n.Br. 117,40 ö. L. J. Klapperich 17.5. 1938 (Fukien)/ Type Serica adspersa G. Frey 1972 ” ( ZMFK) , 1 ♀ “Kuatun (2300 m) 27,40 n.Br. 117,40 ö. L. J. Klapperich 24.5. 1938 (Fukien)/ Type Serica adspersa G. Frey 1972 ” ( ZMFK) .

Additional material examined. 3 ex. “ Chine 21.IV.46 Kuatun, Fukien leg. Tschung-Sen ” ( MHNG) , 2 ex. “ Chine 1.V.46 Kuatun, Fukien leg. Tschung-Sen ” ( MHNG) , 1 ex. “ Chine 12.VI.46 Kuatun, Fukien leg. Tschung-Sen ” ( MHNG) , 1 ex. “ Kuatun (2300 m) 27, 40 n. Br. 117,40 ö. L. J. Klapperich 19.5. 1938 (Fukien)/ ex. Coll. V. Balthasar National Museum Prague, Czech Republic ” ( NMPC) , 1 ex. “ Kuatun (2300 m) 27, 40 n. Br. 117,40 ö. L. J. Klapperich 15.6. 1938 (Fukien)/ ex. Coll. V. Balthasar National Museum Prague, Czech Republic ” ( NMPC) , 1 ex. “ Kuatun (2300 m) 27, 40 n. Br. 117,40 ö. L. J. Klapperich 3.6. 1938 (Fukien)/ ex. Coll. V. Balthasar National Museum Prague, Czech Republic ” ( NMPC) , 2 ex. “ China, Fujian c., 21.-22.VI. Ziyungdongshan, NW slopes 25°46’N 117°20’E, 900-1100m Jaroslav Turna leg., 2007” ( ZFMK) , 1 ♂ “ China, W Jiangxi Jinggang Shan-Ciping 2-14.VI.1994 E. Jendek & O. Sausa leg./ CS78” ( CP) , 2 ♂♂, 1 ♀ “ Huangkeng Aotou, Jianyang , Fujian, 6.V.1960, 750- 950m, leg. Zhang Yiran ” ( IZAS) , 1 ♀ “ Sangang, Chong’anxingcun , Fujian, 26.V. 1960, 750m, leg. Jiang Shengqiao ” ( IZAS) .

Description of the holotype. Length: 10.6 mm, length of elytra: 7.5 mm, width: 5.6 mm. Body oval, reddish brown, elytra and pygidium yellowish brown, elytra with dense small dark spots, dull, partly with greenish toment, antenna yellow; dorsal surface almost glabrous.

Labroclypeus subtrapezoidal, wider than long, widest at base, lateral margins weakly convex and strongly convergent anteriorly; anterior angles moderately rounded; anterior margin distinctly emarginate medially; margins weakly reflexed; surface flat and moderately shiny, on base broadly dull, finely and densely, partly rugosely punctate, with a few sparse erect setae; frontoclypeal suture finely incised, weakly bent medially; smooth area anterior to eye small and flat, twice as wide as long; ocular canthus short and slender (1/3 of ocular diameter), finely densely punctate, with a short terminal seta. Frons completely dull and flat, with fine and dense punctures, glabrous, with a few fine setae beside eyes. Eyes small, ratio diameter/ interocular width: 0.58. Antenna with 9 antennomeres; club with three antennomeres, 0.9 times as long as remaining antennomeres combined and straight. Mentum strongly elevated anteriorly, flattened anteriorly. Labrum weakly produced medially, narrowly but distinctly emarginate medially.

Pronotum narrow and subtrapezoidal, widest at base, lateral margins almost entirely straight, evenly and weakly convex and well convergent anteriorly; anterior angles well produced and sharp; posterior angles blunt, weakly rounded; anterior margin straight, marginal line widely lacking; surface densely finely punctate, with minute setae in punctures; anterior and lateral margins sparsely setose; hypomeron carinate at base, moderately produced ventrally. Scutellum moderately large, triangular, finely and densely punctate, with minute setae in punctures.

Elytra oval, widest at posterior third, striae finely impressed, finely and densely punctate; intervals weakly convex, with fine, sparse punctures concentrated along striae; with a few fine, short setae; epipleural edge fine, ending at moderately curved external apical angle of elytra, glabrous (sparse setae in available specimens probably abraded); apical margin narrowly membraneous, with a fine rime of minute microtrichomes (magnification 100x).

Ventral surface dull, finely and densely punctate, glabrous; metacoxa glabrous, except a few short lateral setae. Mesosternum between mesocoxae half as wide as the slender mesofemur. Ratio of length of metepisternum/ metacoxa: 1/ 1.37. Abdominal sternites with a transverse row of coarse punctures, each bearing a long seta, otherwise glabrous; penultimate sternite at posterior margin with a wide membraneous rim being a quarter as long as sternite. Pygidium weakly convex and dull, finely and densely punctate, without smooth midline, with sparse, short setae on apical half.

Legs slender, shiny, pro- and mesofemur dull; femora with two longitudinal rows of setae, finely and sparsely punctate between the rows. Posterior legs in holotype lacking.

Protibia moderately long, bidentate, external margin smooth but bluntly extended at middle.

Aedeagus: Fig. 4A–C . Habitus: Fig. 4D .

Variation. Metafemur shiny, anterior margin acute, without a continuously serrated line behind anterior edge; ventral posterior margin serrated and only weakly widened at apex, dorsal posterior margin completely serrated, in basal half with a few long setae which are half as long as metafemur width. Metatibia slender and long, widest shortly before apex, ratio of width/ length: 1/4.0, dorsally sharply carinate, with only one group of spines at three quarters of metatibial length, basally with a few single, robust setae in row beside the dorsal margin; external face densely and finely punctate, without longitudinal wrinkles, with short or minute setae in punctures; ventral margin serrated, with two widely separated robust setae; medial face finely sparsely punctate, glabrous; apex interiorly near tarsal articulation bluntly truncate. Tarsomeres ventrally with sparse, minute setae, dorsally smooth. Metatarsomeres ventrally glabrous, laterally and dorsally not carinate, with a strongly serrated ridge ventrally; first metatarsomere as long as following two tarsomeres combined and distinctly longer than dorsal tibial spur. Protarsal claws asymmetrical, basal tooth of inner claw sharply pointed at apex.

Figures

FIGURE 4. A–D: Serica adspersa Frey, 1972 (holotype); E–H: S. solivaga (Brenske, 1898) (Myanmar, Panwar); I–L: S. mengsonana Ahrens, Fabrizi & Liu, new species (holotype). 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 (not to scale). Scale: 0.5 mm.

FIGURE 21. Distribution of Serica adspersa Frey, 1972, S. daqiaoana Ahrens, Fabrizi & Liu, new species, S. dissimillima Ahrens, Fabrizi & Liu, new species, S. jiankouensis Ahrens, Fabrizi & Liu, new species, S. longwang Ahrens, Fabrizi & Liu, new species, S. mensonana Ahrens, Fabrizi & Liu, new species, S. solivaga Brenske, 1898, S. tianmushan Ahrens, Fabrizi & Liu, new species .