Tetraserica loeiensis, 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 : 66-67

Tetraserica loeiensis sp. n. Figures 28, 48

Type material examined.

Holotype: ♂ "Coll. I. R. Sc. N. B., THAILAND (loei), Na-Haeo (field res stat) 15-19.V.2003 Light trap Leg. J. Constant, K. Smets & P. Grootaert/ 66V sp." (ISNB). Paratypes: 1 ♂ "Coll. I. R. Sc. N. B., THAILAND (loei), Na-Haeo (field res stat) 15-19.V.2003 Light trap Leg. J. Constant, K. Smets & P. Grootaert" (ZFMK), 1 ♂ "X-DA4647 labcode: VD075, THAILAND: Loei Ruea NP behind checkpoint 691 m Malaise trap, 17°27.829'N, 101°21.360'E, 5-8.vi.2007, Patikhom Tumtop leg. T2514, Tetraserica spTH_V66/ X-DA4647" (QSBG).

Description.

Length of body: 7.5 mm; length of elytra: 5.6 mm; maximum width: 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: 0.56. Ratio of length of metepisternum/metacoxa: 1/1.8. Metatibia moderately long and wide, ratio width/length: 1/3.91; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 28 E–H. Habitus: Fig. 28I.

Female unknown.

Variation.

Length of body: 7.5-7.7 mm; length of elytra: 5.5-5.6 mm; maximum width: 4.7-5.0 mm.

Diagnosis.

Tetraserica loeiensis sp. n. is rather similar to T. matsumotoi Kobayashi, 2017 and T. wapiensis (Frey, 1972) in shape of the aedeagus; the new species differs from both by the dorsal lobe of left paramere which is distinctly longer than the ventral one.

Etymology.

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