Tetraserica graciliforceps, Liu, Wan-Gang, Fabrizi, Silvia, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2014

Liu, Wan-Gang, Fabrizi, Silvia, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2014, A taxonomic review on the species of Tetraserica Ahrens, 2004, of China (Coleoptera, Scarabaeidae, Sericini), ZooKeys 448, pp. 83-121 : 97-98

Taxon classification Animalia Coleoptera Scarabaeidae

Tetraserica graciliforceps sp. n.

Type material examined.

Holotype: ♂ "China, W Yunnan prov., mts. 60km E Tengchong, 2200m, 19.-22.v.2006, S. Murzin & I. Shokhin" (CPPB). Paratype: 1 ♂ "Yunnan 2200-2500m 24.57N 98.45E 8-16/5. Gaoligong mts. Vit Kubáň leg. 1995" (ZFMK).

Description.

Body length: 8.9 mm, length of elytra: 7.2 mm, width: 5.7 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. Antennal club 1.2 times as long as remaining antennomeres combined. Ratio of length of metepisternum/metacoxa: 1/1.6. Metafemur dull, anterior margin acute, without submarginal serrated line; anterior row of setae-bearing punctures absent; posterior margin with a large sharp hook. Metatibia short and wide, ratio width/length: 1/3.2; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus. Fig. 6 E–G. Habitus: Fig. 6H.

Female unknown.

Variation.

Body length: 8.9-9.8 mm, length of elytra: 7.1-7.2 mm, width: 5.5-5.7 mm.

Diagnosis.

Tetraserica graciliforceps sp. n. differs from Tetraserica longzhouensis by the following features: phallobasis in dorsal view is only slightly asymmetric; left and right parameres are simple, without two lobes; posterior angles of the pronotum are strongly rounded.

Etymology.

The species name is derived from the combined Latin words, gracilis - fine, and forceps - forceps, with reference to the fine and simple parameres of the species.