Tetraserica feresiantarensis, 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 : 36-37

Tetraserica feresiantarensis sp. n. Figures 12, 47

Type material examined.

Holotype: ♂ "Malaysia: Hulu Perak, Bangunan Camp c/o Kampung Semelor (E shore Lake Tasek-Temengor), 230 m a.s.l., 10-19/VII/2007 L. Bartolozzi legit/ Museo Zoologico "La Specola" num. Mag. 2814/ 916 Sericini Asia spec." (MZUF). Paratypes: 2 ♂♂ "Malaysia: Hulu Perak, Bangunan Camp c/o Kampung Semelor (E shore Lake Tasek-Temengor), 230 m a.s.l., 10-19/VII/2007 L. Bartolozzi legit/ Museo Zoologico "La Specola" num. Mag. 2814" (MZUF, ZFMK), 1 ♂ "Malaysia: Hulu Perak, Bangunan Camp c/o Kampung Semelor (E schore Lake Tasek-Temengor), 101°26'16"E, 5°30'18"N, 230 m 29.VI-4.VII.2008/ L. Bartolozzi, G. Mazza, F. Cianferoni, F. Fabiano (num. Mag. 2847)" (MZUF), 1 ♂ "S Thailand: Betong Gunung Cang dun vill. Yala dist., J. Horák leg./ 159 Sericini Asia spec." (CPPB), 1 ♂ "S. Thailand 25.4.1992 Betong S. Bily leg." (NHMB).

Description.

Length of body: 8.9 mm; length of elytra: 6.3 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: 0.63. Ratio of length of metepisternum/metacoxa: 1/1.71. Metatibia short and wide, ratio width/length: 1/2.68; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 12 E–G. Habitus: Fig. 12H.

Female unknown.

Variation.

Length of body: 8.9-9.5 mm; length of elytra: 6.3-7.2 mm; maximum width: 5.8-5.9 mm.

Diagnosis.

Tetraserica feresiantarensis sp. n. differs from the very similar T. siantarensis Moser, 1915 by the median lamina of phallobase having no dorsal preapical tooth and the dorsal lobe of left parameres and median lamina of phallobase being as long as phallobase, rather than being distinctly longer as in T. siantarensis .

Etymology.

The species name (adjective in the nominative singular) is derived from the combined Latin words fere- (nearly) and the species name siantarensis, with reference to the similarity to T. siantarensis (Moser).