Tetraserica nakaiensis, 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 : 97

Tetraserica nakaiensis sp. n. Figures 41, 49

Type material examined.

Holotype: ♂ "Laos centr., Khammouan prov. NAKAI env., 4-8.5.1998, Route No 8 alt. 560 ± 20 m, N17°42.8', E 105°08.9 (GPS), E Jendek & O Šauša leg./ Coll. P Pacholátko / 200 Sericini Asia spec." (CPPB).

Description.

Length of body: 8.9 mm; length of elytra: 6.6 mm; maximum width: 5.5 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: 1/1.74. Metatibia short and wide, ratio width/length: 1/2.81; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 41 I–K. Habitus: Fig. 41L.

Female unknown.

Diagnosis.

Tetraserica nakaiensis sp. n. differs from the similar T. bolavensensis sp. n. by the left paramere being at middle distinctly widened and distinctly longer than the median phallobasal lamina. In T. bolavensensis the left paramere is narrow in the middle (lateral view) and only a little longer than the median phallobasal lamina.

Etymology.

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