Tetraserica xiengkhouangensis, 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 : 23-25

Tetraserica xiengkhouangensis sp. n. Figures 6, 51

Type material examined.

Holotype: ♂ "LAOS-NE, Xieng Khouang prov., 19°37-8'N, 103°20'E, 30km NE Phonsavan Ban Na Lam-> Phou Sane Mt., 1300-1500 m, 10.-30.v.2009, M. Brancucci leg./ NHMB Basel, NMPC Prague, Laos 2009, Expedi tion: M. Brancucci, M. Geiser, Z. Kraus, D. Hauck, V. Kubáň / 914 Sericini Asia spec." (NHMB). Paratypes: 1 ♂ "LAOS-NE, Xieng Khouang prov., 19°37-8'N, 103°20'E, Phonsavan (30km NE) Phou Sane Mt., 1420 m, 10-30.v.2009, Z. Kraus leg./ NHMB Basel, NMPC Prague, Laos 2009, Expedition: M. Brancucci, M. Geiser, Z. Kraus, D. Hauck, V. Kubáň / 914 Sericini Asia spec." (ZFMK).

Description.

Length of body: 8.6 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: 0.68. Ratio of length of metepisternum/metacoxa: 1/1.73. Metatibia moderately long and wide, ratio width/length: 1/3.62; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 6 A–C. Habitus: Fig. 6D.

Female unknown.

Variation.

Length of body: 8.6-8.7 mm; length of elytra: 6.3-6.5 mm; maximum width: 5.2-5.3 mm.

Diagnosis.

Tetraserica xiengkhouangensis sp. n. differs from the similar T. damaidiensis by having the right paramere distinctly not wider (dorsal view) than the left one, and the left paramere short, one third as long as phallobase.

Etymology.

The new species is named with reference to its occurrence in the Xieng Khouang province (adjective in the nominative singular).