A monograph on the genus Tetraserica from the Indochinese region (Coleoptera, Scarabaeidae, Sericini) Author Fabrizi, Silvia Author Dalstein, Vivian Author Ahrens, Dirk text ZooKeys 2019 837 1 155 http://dx.doi.org/10.3897/zookeys.837.32057 journal article http://dx.doi.org/10.3897/zookeys.837.32057 1313-2970-837-1 4A18822935804DB7B1229F131F6A0AC8 4A18822935804DB7B1229F131F6A0AC8 Tetraserica pseudouncinata sp. n. Figures 2, 50 Type material examined. Holotype: ♂ "X-DA4693 labcode: VD086 China, Guangxi A.R., Schiwandashan National Forest Park (forested river valley; at light), 290-360 m, 21°54.4'N , 107°54.2'E , 5-9.iv.2013, M. Fikacek , J. Hajek , J. Ruzicka leg. Tetraserica spCH_V47/ sp-CH-V47/ X-DA4693" (ZFMK). Description. Length of body: 9.3 mm; length of elytra: 6.9 mm; maximum width: 5.9 mm. Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye twice as wide as long. Eyes moderately large, ratio of diameter/interocular width: 0.58. Ratio of length of metepisternum/metacoxa: 1/1.7. Posterior margin of metafemur with blunt tooth. Metatibia moderately long and wide, ratio width/length: 1/3.31; basal group of dorsal spines of metatibia at first third of metatibial length. Aedeagus: Fig. 2 A-D . Habitus: Fig. 2E. Figure 2. A-E Tetraserica pseudouncinata sp. n. (holotype) F-J T. falciformis sp. n. (holotype) K-N T. sculptilis Liu et al., 2014 (holotype). A, F, K aedeagus, left side lateral view D, I, M aedeagus, right side lateral view B, G, L parameres, dorsal view C, H parameres, ventral view E, J, N habitus. Scale bars: 0.5 mm. Habitus not to scale. Female unknown. Diagnosis. Tetraserica pseudouncinata sp. n. differs from T. neouncinata by the left paramere being two thirds as wide as length of the antennal club (rather than one quarter as wide as in T. neouncinata ). Etymology. The species name (adjective in the nominative singular) is derived from the combined Greek word pseudo- (false) and Latin word uncinatus, with reference to the uncinated shape of the right paramere.