Tetraserica setuliforceps, 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 : 30

Tetraserica setuliforceps sp. n. Figures 9, 56

Type material examined.

Holotype: ♂ "NW Thailand, 19.19N, 97.59E, Mae Hong Son, 1991 Ban Huai Po, 1600-2000 m 9-16.5., L. Dembický leg./ 130 Sericini Asia spec." (NHMW). Paratypes: 1 ♂ "NW Thailand, 19.19N, 97.59E, Mae Hong Son, 1991 Ban Huai Po, 1600-2000 m 17.-23.5., L. Dembický leg." (NHMW), 1 ♂ "NW Thailand: 7-12.V., Mae Hong Son distr. 1996 Soppong-pai; 19°27', 98°20', J. Horák lgt.; 1500 m leg./ coll. Pacholátko” (CPPB), 1 ♂ "NW Thailand 9.-16.V. Mae Hong Son 1991, Ban Huai Po, 1600 m, leg. P. Pacholátko / coll. P. Pacholátko” (CPPB), 1 ♂ "NW THAI 7-14.V. DOI SUTHEP PUI 1300-1500 m 1992 leg. P. Pacholátko / coll. P. Pacholátko” (CPPB), 1 ♂ "THAI 24-29.lV.1993, DOI SUTHEP Pacholátko & Dembicky leg/ coll. P. Pacholátko” (ZFMK).

Description.

Length of body: 7.5 mm; length of elytra: 5.9 mm; maximum width: 4.6 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: 0.59. Ratio of length of metepisternum/metacoxa: 1/1.68. Metatibia moderately long and wide, ratio width/length: 1/3.33; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 9 F–H. Habitus: Fig. 9I.

Female unknown.

Variation.

Length of body: 6.7-8.5 mm; length of elytra: 4.9-6.0 mm; maximum width: 4.5-5.0 mm.

Diagnosis.

Tetraserica setuliforceps sp. n. resembles T. changjiangensis Liu et al., 2014 in the shape of aedeagus but it differs by the distinctly longer dorsal lobe of right paramere, which also bears trichome-like spines, and by the nearly straight left paramere.

Etymology.

The species name (noun in apposition) is derived from the combined Latin words setulus (with small setae) and forceps, with reference to the setae present on the right paramere.