Tetraserica semiruiliensis, 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 : 80-82

Tetraserica semiruiliensis sp. n. Figures 35, 51

Type material examined.

Holotype: ♂ "E Thailand, Chanta Buri, Pawa Kaeng Hang Naw, Khao Krok; 300 m; 25.-26.IV.1997; leg. Sadahiro Ohmomo" (ZFMK). Paratypes: 1 ♂ "E Thailand, Chanta Buri, Pawa Kaeng Hang Naw, Khao Krok; 300 m; 25.-26.IV.1997; leg. Sadahiro Ohmomo" (ZFMK), 4 ♂♂ "E Thailand, Chanta Buri, Houw Tabmon Rayong; Khao Chamao; 400 m; 28.IV.1997" (ZFMK), 2 ♂♂ "E Thailand, 5.-13.5- Chanthaburi Dist, Khao Soi Dao, 1998 J. Horák leg/ coll. P. Pacholátko” (CPPB), 2 ♂ "Coll. I. R. Sc. N. B., Cambodia, Pursat pr., Phnom Samkos Wildlife Sanctuary, Pramaoy, 16.XI.2005, forest edge, light trapping Leg. K. Smets & I. Var" (ISNB), 5 ♂♂ "Coll. I. R. Sc. N. B., Cambodia, Pursat Prov Phnom Samkos W.S. Pramaoy Forest Edge, 15-IV-2005, Light Trap Leg. K. Smets & I. Var" (ISNB), 4 ♂♂ "Coll. I. R. Sc. N. B., Cambodia, Pursat prov. Phnom Samkos W.S., forest edge, light trap 14.iv.2005 Leg. K. Smets & I. Var" (ISNB), 3 ♂♂ "Coll. I. R. Sc. N. B., Cambodia (Pursat Prov.) Phnom Samkos wildlife Sanctuary, light trap Forest Edge & Primary 14-IV-2005 Leg. K. Smets & I. Var" (ISNB).

Description.

Length of body: 10 mm; length of elytra: 7.1 mm; maximum width: 5.9 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: 1/1.84. Metatibia short and wide, ratio width/length: 1/2.84; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 35 A–C. Habitus: Fig. 35D.

Female unknown.

Variation.

Length of body: 9.5-10.0 mm; length of elytra: 6.5-7.1 mm; maximum width: 5.5-5.9 mm.

Diagnosis.

Tetraserica semiruiliensis sp. n. differs from the similar T. ruiliensis Liu et al., 2014 by the nearly straight right paramere (lateral view), which is moderately bent at middle (lateral view) in T. ruiliensis .

Etymology.

The species name (adjective in the nominative singular) is derived from the combined Latin prefix semi- (half) and the species name ruiliensis , with reference to the similarity to T. ruiliensis Liu et al.