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 trilobiforceps sp. n. Figures 4, 51 Type material examined. Holotype: ♂ "Laos, 21°09'N , 101°19'E , Louangnamtha pr. Namtha-MuangSing 5-31.v.1997. 900-1200 m, Vit Kuban leg/ coll. Pacholatko / 232 Sericini Asia spec." (CPPB). Paratypes: 1 ♂ "Laos, 21°09'N , 101°19'E , Louangnamtha pr. Namtha-MuangSing 5-31.v.1997. 900-1200 m, Vit Kuban leg/ coll. Pacholatko / 232 Sericini Asia spec." (CPPB), 1 ♂ "LAOS north, 5-11.v.1997, 20 km NW Louang Namtha, N21°09.2 E 101°18.7, alt. 900 +/- 100 m, M. Strba & R. Hergovits leg./ coll. P. Pacholatko / 186 Sericini Asia spec." (ZFMK). Description. Length of body: 8.3 mm; length of elytra: 5.8 mm; maximum width: 4.5 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: 0.63. Ratio of length of metepisternum/metacoxa: 1/1.64. 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. 4 A-C . Habitus: 4D. Figure 4. A-D Tetraserica trilobiforceps sp. n. (holotype) E-H T. phukradungensis sp. n. (holotype) I-M T. cucphongensis sp. n. (holotype) A, E, I aedeagus, left side lateral view C, G, L aedeagus, right side lateral view B, F, J parameres, dorsal view K parameres, ventral view D, H, M habitus. Scale bars: 0.5 mm. Habitus not to scale. Female unknown. Variation. Length of body: 8.3-8.9 mm; length of elytra: 5.8-6.2 mm; maximum width: 4.5-5.2 mm. Diagnosis. Tetraserica trilobiforceps sp. n. differs from all other Tetraserica species by the left paramere having a dorsal lobe distant from base. Etymology. The species name (noun in apposition) is derived from the combined Latin words tri- (three times), lobatus (lobed), and forceps, with reference to the shape of the left paramere.