Tetraserica champassakana, 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 : 54

Tetraserica champassakana sp. n. Figures 21, 46

Type material examined.

Holotype: ♂ "Laos, Champassak Prov., Dong Hua Xao NBCA bank of Nam Phak river, 15°59'N, 105°55'E / 280 m, at light, No. 14, 28-29.III.1998 leg. O Merkl & G Csorba" (HNHM). Paratype: 1 ♂ "Laos, Champassak Prov., Dong Hua Xao NBCA bank of Nam Phak river, 15°59'N, 105°55'E / 280 m, at light, No. 14, 28-29.III.1998 leg. O Merkl & G Csorba" (ZFMK).

Description.

Length of body: 8.8 mm; length of elytra: 5.9 mm; maximum width: 5.3 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: 0.5. Ratio of length of metepisternum/metacoxa: 1/1.73. 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. 21 I–K. Habitus: Fig. 21L.

Female unknown.

Variation.

Length of body: 7.2-8.8 mm; length of elytra: 5.4-5.9 mm; maximum width: 4.5-5.3 mm.

Diagnosis.

Tetraserica champassakana sp. n. is rather similar to T. nahaeoensis sp. n. in the shape of the aedeagus but differs by the longer right paramere being half as long as phallobase.

Etymology.

The new species is named with reference to its occurrence in Champassak province (adjective in the nominative singular).