Tetraserica multiangulata, 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 : 56

Tetraserica multiangulata sp. n. Figures 22, 49

Type material examined.

Holotype: ♂ "N. Vietnam: 40 km NE Thainguyen, 300 m, 14.V.1963, leg. O. Kabakov" (ZIN).

Description.

Length of body: 7.6 mm; length of elytra: 6 mm; maximum width: 4.5 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: 0.53. Ratio of length of metepisternum/metacoxa: 1/1.5. Posterior margin of metafemur with blunt tooth. Metatibia moderately long and wide, ratio width/length: 1/3.31; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 22 E–G. Habitus: Fig. 22H.

Female unknown.

Diagnosis.

Tetraserica multiangulata sp. n. differs by all other Tetraserica species by the blunt tooth at the posterior margin of metafemur, by the long and narrow left paramere, by the median lamina of phallobase being as long or nearly as long as phallobase, and by the left paramere being more than half as long as phallobase; furthermore, the left paramere is split shortly before the apex into two filiform but flattened branches.

Etymology.

The name of the new species (adjective in the nominative singular) is derived from the combined Latin words multi (numerous) and angulatus (angled), with reference to the parameres being bent numerous times.