Tetraserica margheritae, 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 : 60-63

Tetraserica margheritae sp. n. Figures 25, 51

Type material examined.

Holotype: ♂ "Thailand bor. Chiang Mai, 56 km NW 99°25'E, 19°05'N, 7-14.6.1995 lgt. Snizek M./ 943 Sercini Asia spec." (ZFMK). Paratype: 1 ♂ "Thailand bor. Chiang Mai, 56km NW 99°25'E, 19°05'N, 7-14.6.1995 lgt. Snizek M./ 943 Sercini Asia spec." (ZFMK).

Description.

Length of body: 7.3 mm; length of elytra: 6.1 mm; maximum width: 4.6 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: 0.44. Ratio of length of metepisternum/metacoxa: 1/1.62. Metatibia short and wide, ratio width/length: 1/2.83; basal group of dorsal spines of metatibia at first third of metatibial length. Robust spine at middle of ventral margin extremely prolonged and s-shaped, exceeding distal margin of metatibia.

Aedeagus: Fig. 25 E–G. Habitus: Fig. 25H.

Female unknown.

Variation.

Length of body: 7.1-7.3 mm; length of elytra: 4.8-6.1 mm; maximum width: 4.5-4.6 mm.

Diagnosis.

Tetraserica margheritae sp. n. differs from the externally similar T. bansanpakiana sp. n. by the median phallobasal lamina being narrower and sharply pointed at apex, also by having a dorsal tooth and the left paramere being distinctly shorter than median phallobasal lamina.

Etymology.

The new species is named after Silvia’s mother, Margherita (noun in genitive singular).