Tetraserica auriculata, 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 : 76

Tetraserica auriculata sp. n. Figures 33, 46

Type material examined.

Holotype: ♂ "X-DA4700 labcode: VD089 CAMBODIA Sihanouk-ville 20-40 m, 20.-30.iv.2008, S. Murzin leg. Tetraserica spCA_V50/ X-DA4700/ sp-CA-V50" (ZFMK).

Description.

Length of body: 8.1 mm; length of elytra: 6.6 mm; maximum width: 5.4 mm. Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye twice as wide as long. Eyes small, ratio of diameter/interocular width: 0.5. Ratio of length of metepisternum/metacoxa: 1/1.73. Metatibia short and wide, ratio width/length: 1/3; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 33 A–C. Habitus: Fig. 33D.

Female unknown.

Diagnosis.

Tetraserica auriculata sp. n. is similar to T. pailinensis sp. n. in shape of aedeagus, from which it differs by the dorsal lobe of the left paramere being distinctly shorter than the median lamina of phallobase and the right paramere being narrower (in lateral view) and distinctly shorter than median lamina of phallobase. In T. pailinensis sp. n. the dorsal lobe of left paramere is distinctly exceeding the median lamina of phallobase and the right paramere is wider (in lateral view) and a little shorter than median lamina of phallobase.

Etymology.

The name of the new species (adjective in nominative singular) is derived from the Latin adjective auriculatus (ear-shaped), with reference to the ear-shaped median apical lamella of phallobase.