Maladera peregoi Ahrens, Fabrizi & Liu, 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 : 207-208

Maladera peregoi Ahrens, Fabrizi & Liu , sp. n.

Figures 47 F–I, 112

Type material examined. Holotype: ♂ “Birmania, S.S.S. Palaing, 1450m. VI.1935 R. Perego ” ( MSNM). Paratypes: Myanmar: 1 ♂ “Birmania, S.S.S. Palaing, 1450m. V.-1935 R. Perego ” ( ZFMK). Thailand: 1 ♂ “Thai 11- 15.V.1993 Nan Pha Khab Pacholatko & Dembicky leg./ TS57” ( CP), 1 ♂ “Thai-N, Nan prov., 19°13’N 101°7’E, Doi Phukha N.P. Headq., 22.-26.iv.1999, ca 1500m, D. Hauck leg.” ( CP). Vietnam: 1 ♂, 1 ♀ “Museum Paris (coll. Parendel) Coll. J. Chatarmy 1914/ Ngap-Son Tonkin” ( MNHN), 2 ♂♂, 1 ♀♀ “Museum Paris (coll. Parendel) Coll. J. Chatarmy 1914[/ Ngap-Son Tonkin]” ( MNHN). Laos: 21 ♂♂, 25 ♀♀ “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 ♀ “Laos-NE, Huoa Phan prov., 20° 13’09-19’’N 103°59’54’’- 104°00’03’’E, 1480-1510m, Phou Pane Mt., 22.iv.-14.v.2008, Vit Kuban leg.” ( ZFMK), 1 ♂ “X-DA4723 Laos Hua Phan prov.; Ban Saleui , Phou Pan (Mt.) 20°12’N, 104°01 ’ 15.-30.iv.2014 leg. C. Holzschuh—ZFMK Ankauf 2014 Serica spLaos_ Phupane 41” ( ZFMK), 1 ♂ “X-DA4771 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 Serica spLaos_ Phupane 41” ( ZFMK), 1 ♂ “X-DA4773 Laos Hua Phan prov.; Ban Saleui , Phou Pan (Mt.) 20°12’N, 104°01 ’ 15.-30.iv.2014 leg. C. Holzschuh—ZFMK Ankauf 2014 Serica spLaos_ Phupane 41” ( ZFMK), 1 ♂ “X-DA4931 Laos Hua Phan prov.; Ban Saleui , Phou Pan (Mt.) 20°12’N, 104°01 ’ 15.- 30.iv.2014 leg. C. Holzschuh—ZFMK Ankauf 2014 Serica spLaos_ Phupane 41” ( ZFMK), 1 ♂ “X-DA4772 Laos Hua Phan prov.; Ban Saleui , Phou Pan (Mt.) 20°12’N, 104°01 ’ 15.-30.iv.2014 leg. C. Holzschuh—ZFMK Ankauf 2014 Serica spLaos_ Phupane 41” ( ZFMK). China: 1 ♂ “[China] Mt. Eshan , VI.1979, No. 301” ( IZAS), 1 ♂ “[China] Jingdong , Yunnan, 30.VI.1956, 1170m, leg. Zagulaev ” ( IZAS), 1 ♂ “[China] Jingdong , Yunnan, 6.VI.1956, 1170m, leg. Krischanovskna ” ( IZAS) .

Description. Length: 5.2 mm, length of elytra: 3.4 mm, width: 3.0 mm. Body oblong-oval, dorsal face reddish brown, dull, antenna yellow, head shiny, except some single setae on head dorsal surface nearly glabrous.

Labroclypeus wide and subtrapezoidal, widest at base, lateral margins convex and distinctly convergent anteriorly, anterior angles moderately rounded, anterior margin emarginate medially, margins strongly reflexed; lateral margin and ocular canthus produce an indistinct angle; surface flat, finely and very densely punctate, with a few larger punctures each bearing an erect seta; frontoclypeal suture indistinct, evenly curved; smooth area anterior to eye weakly convex, as wide as long; ocular canthus short and wide (1/4 of ocular diameter), finely and densely punctate, with a terminal seta. Frons completely shiny, with very dense, fine punctures, behind frontoclypeal suture and beside eyes with a few long setae in large sparse punctures. Eyes moderately large, ratio diameter/ interocular width: 0.7. 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 evenly convex and strongly convergent anteriorly, anterior angles distinctly produced and sharp, posterior angles strongly rounded; anterior margin straight, with complete and fine marginal line, base without marginal line; surface finely and densely punctate, with minute setae in punctures; lateral anterior and lateral margin finely setose; hypomeron carinate, not produced ventrally. Scutellum wide, triangular, with fine, dense punctures.

Elytra widest shortly behind middle, striae finely 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 very few single, short setae; epipleural margin robust, ending at weakly curved 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, coarsely and densely punctate, glabrous, metasternal disc sparsely covered with fine, short 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: 1/1.4. Pygidium weakly convex and dull, coarsely and densely punctate, without impunctate midline, glabrous except a few robust setae along apical margin.

Legs short and wide, shiny; femora with two longitudinal rows of setae, finely and sparsely punctate. Metafemur with anterior margin acute, without adjacent serrated line, anterior row of setae complete; posterior margin smooth, weakly widened at apex and smooth ventrally, not serrate dorsally, finely shortly setose. Metatibia short and wide, widest at middle, ratio of width/length: 1/2.8, sharply carinate dorsally, with two groups of spines, basal group at one third, apical group at two thirds of metatibial length, with a few robust setae basally subparallel to dorsal margin; lateral face longitudinally convex, shiny, sparsely punctate and glabrous; ventral margin finely serrate, with four equidistant, short and robust setae; medial face smooth and glabrous; apex finely serrate, moderately truncate interiorly near tarsal articulation. Tarsomeres dorsally impunctate, moderately setose ventrally; metatarsomeres with a strongly serrated ridge ventrally and a smooth subventral longitudinal carina, laterally and dorsally not carinate; first metatarsomere as long as following two tarsomeres combined and twice as long as dorsal tibial spur. Protibia short, bidentate; anterior claws symmetrical, basal tooth of both claws bluntly truncate at apex.

Aedeagus: Fig. 47 F–H. Habitus: Fig. 47I .

Diagnosis. Maladera peregoi Ahrens, Fabrizi & Liu , sp. n. differs from all other other species of the indica group in having the parameres longer than the phallobase and in having a narrow median process on the dorsal apex of phallobase.

Etymology. The name (adjective in the nominative singular) of the new species is dedicated to one of the collectors of the species, R. Perego.

Variation. Length: 5.0– 5.8 mm, length of elytra: 3.4–3.9 mm, width: 3.0– 3.6 mm. Morphology of the female is the same as that of male, no sexual dimorphism. Female: eyes little smaller than in male, ratio of diameter/interocular width: 0.59; antennal club as in male; pygidium flat.

Distribution. See map ( Fig. 112 ) and Table 1.

Figures

FIGURE 47. A–E: Maladera bansongchana Ahrens, Fabrizi & Liu, sp. n. (holotype); F–I: M. peregoi Ahrens, Fabrizi & Liu, sp. n. (holotype); J–M: M. pallida (Burmeister, 1855) (China). A, F, J: aedeagus, left side lateral view; D, H, L: aedeagus, right side lateral view; B, G, K: parameres, dorsal view; E, I, M: habitus. Scale: 0.5 mm. Habitus not to scale.

FIGURE 112. Distribution of the Maladera indica group: Maladera lushuiensis sp. n., M. pallida (Burmeister, 1855), M. peregoi sp. n., M. pseudoconsularis sp. n., M. sinobiloba sp. n., M. yongrenensis sp. n..