Tetraserica vientianeensis, Fabrizi, Silvia, Dalstein, Vivian & Ahrens, Dirk, 2019

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 : 52

Tetraserica vientianeensis sp. n. Figures 20, 54

Type material examined.

Holotype: ♂ "Laos Bolikhamxai pr., 18°16'N, 103°11'E, 70 km NEE Vientiane 27-30.iv.1997, 150 m, Vít Kubáň leg./ coll. P. Pacholátko / 197 Sericini Asia spec." (CPPB).

Description.

Length of body: 8.3 mm; length of elytra: 6 mm; maximum width: 4.9 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: 0.64. Ratio of length of metepisternum/metacoxa: 1/1.65. Metatibia short and wide, ratio width/length: 1/2.93; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 20 I–K. Habitus: Fig. 20L.

Female unknown.

Diagnosis.

Tetraserica vientianeensis sp. n. differs from the similar T. constanti sp. n. by the basally straight and unbent left paramere, and by the median lamina of phallophase which is not widened at apex.

Etymology.

The new species is named with reference to its close occurrence to the city of Vientiane (adjective in the nominative singular).