Tetraserica appendiculata, 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 : 32-34

Tetraserica appendiculata sp. n. Figures 11, 46

Type material examined.

Holotype: ♂ "X-DA4795 labcode: VD100, LAOS, Stupa GH, 5 km W Muang Sing, 750 m, 21.1482N 101.1711E, 9.v-2.vi.2011, M. Murzin, O. Shulga leg. Tetraserica spLA_V59/ sp-LA-v59/ X-DA4795" (ZFMK). Paratype: 1 ♂ "Laos, 21°09'N, 101°19'E, Louangnamtha pr. Namtha->Muang Sing, 5-31.v.1997, 900-Vit. Kubáň leg. -1200 m/ Coll. P. Pacholátko / LS57" (CPPB).

Description.

Length of body: 8.8 mm; length of elytra: 6.5 mm; maximum width: 5.3 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: 0.65. Ratio of length of metepisternum/metacoxa: 1/1.52. Metatibia short and wide, ratio width/length: 1/3.21; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 11 A–D. Habitus: Fig. 11E.

Female unknown.

Variation.

Length of body: 7.8-8.8 mm; length of elytra: 5.9-6.5 mm; maximum width: 5.0-5.3 mm.

Diagnosis.

The shape of aedeagus of T. appendiculata sp. n. is very similar to that of T. mengeana Liu et al., 2014; the new species differs in having one filiform sub-branch of the left paramere reduced, being much shorter than the width of principal branch at apical third.

Etymology.

The species name (adjective in the nominative singular) is derived from the Latin word appendiculus (small appendage), with reference to the small appendix of the paramere.