Tetraserica trilobiforceps, 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 : 21

Tetraserica trilobiforceps sp. n. Figures 4, 51

Type material examined.

Holotype: ♂ "Laos, 21°09'N, 101°19'E, Louangnamtha pr. Namtha-MuangSing 5-31.v.1997. 900-1200 m, Vit Kubáň leg/ coll. Pacholátko / 232 Sericini Asia spec." (CPPB). Paratypes: 1 ♂ "Laos, 21°09'N, 101°19'E, Louangnamtha pr. Namtha-MuangSing 5-31.v.1997. 900-1200 m, Vit Kubáň leg/ coll. Pacholátko / 232 Sericini Asia spec." (CPPB), 1 ♂ "LAOS north, 5-11.v.1997, 20 km NW Louang Namtha, N21°09.2 E 101°18.7, alt. 900 ± 100 m, M. Štrba & R. Hergovits leg./ coll. P. Pacholátko / 186 Sericini Asia spec." (ZFMK).

Description.

Length of body: 8.3 mm; length of elytra: 5.8 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 moderately large, ratio of diameter/interocular width: 0.63. Ratio of length of metepisternum/metacoxa: 1/1.64. 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. 4 A–C. Habitus: 4D.

Female unknown.

Variation.

Length of body: 8.3-8.9 mm; length of elytra: 5.8-6.2 mm; maximum width: 4.5-5.2 mm.

Diagnosis.

Tetraserica trilobiforceps sp. n. differs from all other Tetraserica species by the left paramere having a dorsal lobe distant from base.

Etymology.

The species name (noun in apposition) is derived from the combined Latin words tri- (three times), lobatus (lobed), and forceps, with reference to the shape of the left paramere.