Tetraserica microspinosa, 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 : 58

Tetraserica microspinosa sp. n. Figures 23, 50

Type material examined.

Holotype: ♂ "N Vietnam - Lao Cai province, Van Ban district: Van Ban Nature Reserve- (~1000 m)- 23-26.V.2011/ L. Bartolozzi, S. Bambi, F. Fabiano, E. Orbach leg./ 934 Sericini Asia spec." (VNMN).

Description.

Length of body: 7.5 mm; length of elytra: 5.8 mm; maximum width: 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: 0.46. Ratio of length of metepisternum/metacoxa: 1/1.61. Metatibia moderately long and wide, ratio width/length: 1/3.58; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 23 E–G. Habitus: Fig. 23H.

Female unknown.

Diagnosis.

Tetraserica microspinosa sp. n. differs from all Tetraserica species in having a very short median phallobasal lamina and by having both parameres long and filiform.

Etymology.

The name of the new species (adjective in nominative singular) is derived from the combined Greek and Latin words micros (small) and spinosus (with spines), with reference to a small spine-like tooth on the left paramere.