Tetraserica pluriuncinata, 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 : 28

Tetraserica pluriuncinata sp. n. Figures 8, 53

Type material examined.

Holotype: ♂ "NE Thailand 1-15.[v.]1991. Mae Hong Son, Ban Huai Po, 800-1600 m, S. Bily leg." (ZFMK). Paratypes: 1 ♂ "NW Thailand, Mae Hong Son, 9-16.V.1991 Ban Huai Po 1600 m leg. P. Pacholátko / coll. P. Pacholátko / TS135/ 146 Sericini Asia spec." (CPPB), 7 ♂♂ "NW Thailand, 19.19N, 97.59E, Mae Hong Son, 1991 Ban Huai Po, 1600-2000 m 17.-23.5., L. Dembický leg." (NHMW, ZFMK).

Description.

Length of body: 7.6 mm; length of elytra: 5.9 mm; maximum width: 5 mm. Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye twice as wide as long. Eyes moderately large, ratio of diameter/interocular width: 0.77. Ratio of length of metepisternum/metacoxa: 1/1.52. Metatibia moderately long and wide, ratio width/length: 1/3.38; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 8 E–G. Habitus: Fig. 8H.

Female unknown.

Variation.

Length of body: 7.6 mm; length of elytra: 5.8-5.9 mm; maximum width: 4.8-5 mm.

Diagnosis.

Tetraserica pluriuncinata sp. n. differs from T. bachmaensis by the left paramere being split into two long branches (or lobes) and by having much longer median phallobasal apophysis.

Etymology.

The species name (adjective in the nominative singular) is derived from the combined Greek word pluris (higher) and Latin word uncinatus (hooked), with reference to the pluri-hooked shape of the right paramere.