Tetraserica koi, 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 : 43

Tetraserica koi sp. n. Figures 15, 48

Type material examined.

Holotype: ♂ "Thailand (S) Prov. Chumphon, ca 5 km S von Phato 06.VII.2008 leg. M Langer/ 1000 Asia Sericini spec." (ZFMK). Paratypes: 1 ♂, 1 ♀ "Thailand (S) Prov. Chumphon, ca 5 km S von Phato 06.VII.2008 leg. M Langer" (ZFMK).

Description.

Length of body: 7 mm; length of elytra: 5.4 mm; maximum width: 4.5 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: 0.48. Ratio of length of metepisternum/metacoxa: 1/1.39. Metatibia short and wide, ratio width/length: 1/3.25; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 15 I–K. Habitus: Fig. 15L.

Variation.

Length of body: 7.0-8.4 mm; length of elytra: 5.4-6.1 mm; maximum width: 4.5-4.8 mm. Female: Eyes as large as in male; antennal club composed of three antennomeres, as long as remaining antennomeres combined.

Diagnosis.

Tetraserica koi sp. n. differs from all other species with the left paramere composed of two lobes at its base, by the right paramere being half as long as phallobase, and the left paramere longer than phallobase.

Etymology.

The new species is named in honour of Prof Dr Ko, Silvia’s oncologist and director of the Johanniter Hospital in Bonn, for all his efforts and care (noun in genitive singular).