Tetraserica cattienensis, 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 : 54-56

Tetraserica cattienensis sp. n. Figures 22, 46

Type material examined.

Holotype: ♂ "Museum Leiden Viet Nam (Dong Nai Prov.) Cát Tiên NP: Ficus trail. 9-26.iv.2007. leg. May Phu Quy, Nguyen Than Mahn/ humid lowland forest; in malaise traps; 250 m 11°26'20, 6"N, 107°25'42"E" (RMNH). Paratypes: 1 ♂ "Museum Leiden Viet Nam (Dong Nai Prov.) Cát Tiên N.P.: Ficus trail. 9-26.iv.2007. leg. May Phu Quy, Nguyen Than Mahn/ humid lowland forest; in malaise traps; 250 m 11°26'20, 6"N, 107°25'42"E" (ZFMK), 1 ♂ "Museum Leiden Viet Nam (Dong Nai Prov.) Cát Tiên N.P.: Ficus trail. 10.iv-15.v.2007. Leg. May Phu Quy, Nguyen Than Mahn/ humid lowland forest; in malaise traps; 250 m. 11°26'20, 6"N, 107°25'42"E" (RMNH), 1 ♂ "S Vietnam, 1-5.5.1994 Nam Cat Tien Nat. park P. Pacholátko & L. Dembický leg./ coll. P. Pacholátko /VS 118" (CPPB).

Description.

Length of body: 8.4 mm; length of elytra: 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: 0.67. Ratio of length of metepisternum/metacoxa: 1/1.61. Metatibia short and wide, ratio width/length: 1/2.35; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 22 A–C. Habitus: Fig. 22D.

Female unknown.

Variation.

Length of body: 7.9-8.4 mm; length of elytra: 5.9-6 mm; maximum width: 4.9-5.0 mm.

Diagnosis.

Tetraserica cattienensis sp. n. differs from all other Tetraserica species in having a straight or slightly convex posterior margin of the metafemur, small eyes, and the short median phallobasal lamina being half as long as phallobase. From the similar T. bansanpakiana sp. n. and T. margheritae sp. n., T. cattienensis sp. n. differs by the robust spines on the ventral margin of metatibia being subequal in length.

Etymology.

The new species is named after the type locality, Cát Tiên NP (adjective in the nominative singular).