Tetraserica siantarensis (Moser, 1922) Moser, 1922

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

Tetraserica siantarensis (Moser, 1922) comb. n. Figures 12, 50

Neoserica siantarensis Moser, 1922: 104.

Type material examined.

Lectotype (here designated): ♂ "Fort de Kock (Sumatra) 920 m Januari 1922 leg. E. Jacobson/ Neoserica siantarensis Mos. [handwritten by Moser] det. J. Moser 1926 [handwritten by curator?]" (ZMAN). Paralectotype: 1 ♀ "Fort de Kock (Sumatra) 920 m Januari 1922 leg. E. Jacobson/ Neoserica siantarensis Mos.[handwritten by Moser]/ det. J. Moser 1926 [handwritten by curator?]" (ZMAN).

Additional material examined.

2 ♂♂, 1 ♀ "Malaysia W, Kelantan 40 km N of Gua Musang Gunung Berangkat Kampong Riek; 1100 m, 15.v.-8.vi.2017 Petr Cechovsky lgt." (NME), 1 ♂, 1 ♀ "W-Sumatra Payakumbuh Sarilamak env. 15.-16.2.91 Jezevec lgt." (ZFMK), 1 ♂ "Indonesia W, Sumatra, Harau Valley, Payakumbuh near Bukit Tinggi, XI.1993-IV.1994, Sarimudanas leg." (ZFMK), 1 ♂, 1 ♀ "Indonesia Sumatra Utara Sungei Kopas II, ca 60 km E Pematangsiantar ca. 300 m, Sekundärwald 25.03.1997, leg.C U. P. Zorn" (ZFMK), 1 ♂ "I-W. Sumatra 600 m Paykumbuh 6-10.1. Harau vill. env. St. Jakl lgt.1991" (ZFMK), 1 ♂, 1 ♀ "Sumatra Utara Aek Bum b. Rantanprabat 11/12.2.96 lg. Zorn" (ZFMK), 2 ♂♂ "Malaysia 10-16.iv.1999 Kelantan prov. Kampong Raja env. Lgt. Mir. Janalik" (ZFMK), 1 ♂ "Indonesien Sumatra Aceh-Prov. Umg. Kotacane Ketambe 15.-22. Januar 2016 leg. Horst Rudolph" (Coll. H. Rudolph), 1 ♂ "Indonesien/Sumatra Sindar Raya LF Simaraopa 350 m NN 24. Februar 1993 leg. Horst Rudolph" (Coll. H. Rudolph).

Diagnostic description.

Body length: 8.8 mm, length of elytra: 7.2 mm, width: 6.0 mm.

Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye three times as wide as long. Antennal club 1.1 times as long as remaining antennomeres combined. Eyes moderately large; ratio of diameter/interocular width: 0.69. Ratio of length of metepisternum/metacoxa: 1/1.59. Metafemur dull, anterior margin acute, without submarginal serrated line; anterior row of setae-bearing punctures absent; posterior margin with a blunt tooth. Metatibia short and wide, ratio width/length: 1/2.7; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 12 A–C. Habitus: Fig. 12D.