Tetraserica vietnamensis (Frey, 1969) Frey, 1969

Fabrizi, Silvia, Dalstein, Vivian & Ahrens, Dirk, 2019, A monograph on the genus Tetraserica from the Indochinese region (Coleoptera, Scarabaeidae, Sericini), ZooKeys 837, pp. 1-155 : 83

Tetraserica vietnamensis (Frey, 1969) comb. n. Figures 36, 51

Neoserica vietnamensis Frey, 1969: 109, fig. 2b.

Type material examined.

Holotype: ♂ "Dalat S. Vietnam/ Typus/ Typus Neoserica vietnamensis n.sp. G. Frey 1967" (CF). Paratypes: 1 ♂ "Dalat 1966 S. Vietnam/ Paratype/ Neoserica vietnamensis ♂ n. sp. G. Frey 1967" (CF).

Additional material examined.

1 ♂ "Dalat 1966 S. Vietnam/ Neoserica vietnamensis Frey" (CF), 1 ♂ "Museum Leiden Viet Nam (Dak Lak Prov.) Chu Yang Sin N.P.: 6-8 km S of Dam construction-site. 1-10.vi.2007. Leg. C. van Achterberg, R. de Vries & E. Gassó Miracle/ primary evergreen forest near stream; in malaise traps; 750 m, 12°26'26.3"N, 108°19'5"E " (RMNH), 1 ♂ "S Vietnam, 12.03N 108.27E 12 km N of Dalat-Lang Bian, 1580-1750 m, 17-21.iv.1999, Pacholátko & Dembický leg./ coll. P. Pacholátko / VS 72" (CPPB).

Redescription.

Length of body: 10.5 mm; length of elytra: 7.9 mm; maximum width: 6.1 mm. Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye twice as wide as long. Eyes small, ratio of diameter/interocular width: 0.55. Ratio of length of metepisternum/metacoxa: 1/1.69. Posterior margin of metafemur with blunt tooth. Metatibia short and wide, ratio width/length: 1/3.06; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 36 E–G. Habitus: Fig. 36H.