Maladera botrytibia Nomura, 1974

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 : 141-142

Maladera botrytibia Nomura, 1974

Figures 30 E–H, 102

Maladera botrytibia Nomura, 1974: 104 , 111.

Additional material examined. Thailand: 1 ♂ “NW Thailand, 30.4.1992 Mae Hong Son 350m, S. Bily ” ( NHMB) , 1 ♂ “NW Thailand 1.- 6.5.1992 Soppong-Pai 1800m, leg. Pacholatko / TS 87” ( CP), 1 ♂ “N Laos: 10 km N Louang Prabang, Mekong riv., 240 km N Vientiane) XII.1992 hill country sparse settled primary vegetation, Insomasy Somsy leg.” ( ZFMK), 1 ♂ “N-Thailand III.1992 3 km W Ban Rai 170 kn NW Bankok 150m NN lg. Malicky” ( ZSM), 4 ♂♂ “ Thailand Angkhai village, Sampong Dist. Chiang Mai Prov. 9.-11.v.1999 K. Masumoto leg.” ( ZFMK), 1 ♂ “ Thailand 25 km NW v. Lan-Sak 65 km NW Thai-Thani ca. 220km NW Bangkok 110m IX.1990 ” ( ZMHB). China: 1 ♂ “ Bawang Town, Changjiang, Hainan, 10.V.2007, leg. Ba Yinbin, Lang Juntong ” ( HBUM), 1 ♀ “Mts. Bawangling, Changjiang, Hainan, 11-12.V.2007, leg. Ba Yinbin, Lang Juntong ” ( HBUM), 1 ♂ “Laoda, Anhui, 6.V.1977, light trap, leg. Huang Ju ” ( IZAS), 1 ♂ “ Mt. Bawangling Nature Reserve, Hainan, 4.IV.2008, light trap, leg. Zhu Gengping ” ( NKU), 1 ♂ “ Mt. Jianfengling , Hainan, 24.III.1984, leg. Song Shimei ” ( IZAS) , 2 ♂♂ “ Hong Kong; Lantau I: San Shek Wan; 13.v.1988 / C. O’Connell , Coll. Bishop Museum ” ( BMH) , 1 ♂ “ Hong Kong; Lantau I: San Shek Wan; v.1988 / C. O’Connell, Coll. Bishop Museum ” ( BMH) .

Redescription. Length: 8.3 mm, length of elytra: 5.6 mm, width: 4.9 mm. Body oblong-oval, yellowish brown, dull, labroclypeus shiny, with a few long setae on head, pronotum and elytra.

Labroclypeus wide and subtrapezoidal, widest at base, lateral margins nearly straight and convergent anteriorly, anterior angles weakly rounded and reflexed, anterior margin shallowly emarginate, strongly elevated and reflexed medially, other margins moderately reflexed; lateral margin and ocular canthus produce an indistinct angle; surface distinctly elevated along middle, finely, densely punctate, with a few erect, long setae; frontoclypeal suture distinctly incised, evely curved; smooth area anterior to eye convex, twice as wide as long; ocular canthus short and wide (1/3 of ocular diameter), finely densely punctate, with a terminal seta. Frons dull, with very sparse and superficial punctures, with a few single setae beside eyes and behind frontoclypeal suture. Eyes small, ratio diameter/ interocular width: 0.63. Antenna with ten antennomeres; club with three antennomeres and straight, slightly longer than remaining antennomeres combined. Mentum elevated and slightly flattened anteriorly.

Pronotum moderately transverse, widest shortly behind middle, lateral margins evenly convex and convergent towards angles, anterior angles distinctly produced and sharp, posterior angles blunt, rounded at tip; anterior margin straight, with fine marginal line, base without marginal line; surface moderately finely and densely punctate, with minute setae in punctures and a very few long, semi-erect setae on lateral disc; anterior and lateral margin finely densely setose; hypomeron carinate, not produced ventrally. Scutellum wide, triangular, with fine, moderately dense punctures, impunctate on midline.

Elytra widest in posterior third, striae finely impressed, finely and densely punctate, intervals flat, with fine, sparse punctures and with minute setae in punctures, odd intervals with numerous single long setae; epipleural margin robust, ending at half of elytra, epipleura sparsely setose; apical border of elytra membraneous, with a very fine rim of microtrichomes (visible at ca 100x magnification).

Ventral surface dull, finely and densely punctate, nearly glabrous, metasternal disc sparsely covered with fine, short setae; metacoxa with a few longer setae laterally. Abdominal sternites finely and densely punctate, punctures with minute setae, 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: 1/2.0. Pygidium strongly convex, dull, coarsely and moderately densely punctate, with narrow smooth midline, with a few long setae on disc and along apical margin.

Legs short and wide, dull; femora with two longitudinal rows of setae, finely and sparsely punctate. Anterior margin of metafemur acute, without adjacent serrated line, anterior row of setae completely reduced; posterior ventral margin smooth, strongly widened at ventral apex, dorsal posterior margin smooth, neither serrate, glabrous. Metatibia short and wide, widest at middle, ratio of width/length: 1/2.6, 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 few short and robust single setae; lateral face longitudinally convex, superficially and sparsely punctate, along midline widely smooth, glabrous; ventral margin finely serrate, with five equidistant robust setae; medial face smooth and glabrous; apex finely serrate, shallowly emarginate interiorly near tarsal articulation. Tarsomeres dorsally impunctate, glabrous, neither laterally nor dorsally carinate, moderately setose ventrally; metatarsomeres with a strongly serrated ridge ventrally and a smooth subventral longitudinal carina, glabrous; first metatarsomere distinctly shorter than following two tarsomeres combined and slightly longer than dorsal tibial spur. Protibia moderately long, bidentate; anterior claws symmetrical, basal tooth of both claws bluntly truncate at apex.

Aedeagus: Fig. 30 E–G. Habitus: Fig. 30H .

Distribution. See map ( Fig. 102 ) and Table 1.

Figures

FIGURE 30. A–D: Maladera straminea (Moser, 1915) (China: Guangxi: Luoxiang); E–H: M. botrytibia Nomura, 1974 (Thailand: Mae Hong Son); I–L: M. subtruncata (Fairmaire, 1887) (China: Yunnan: Nabanhe). 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 102. Distribution of the Maladera thomsoni group: Maladera apicalis sp. n., M.aureola (Murayama, 1938), M. botrytibia Nomura, 1974, M. guomenshanica sp. n., M. hansmalickyi sp. n..