Tetramorium pacificum Mayr, 1870

Material examined. Commonwealth Road, 1.31115, 103.78171, 22-24 Nov 2016, G.W. Yong leg., ZRC _HYM_0001758-1759; Icube building (NUS), 1.29347, 103.77633, Jul-Sep 2015, M.S. Foo & W. Wang leg., malaise trap, ZRC _BDP (multiple); Kent Ridge, 20 Apr 1985, D.H. Murphy leg., ZRC _HYM_0000757; Mandai, 1.4083, 103.77803, 19 Jun 2016, M.K.L. Wong leg., ZRC _ ENT00000700; Namly forest, 10 May 1985, D.H. Murphy leg., ZRC _ HYM_0000746; Prince George’s Park Residences (NUS), 1.29239, 103.77869, May-Sep 2015, M.S. Foo & W. Wang leg., ZRC _BDP (multiple); Yishun wasteland, 1.42078, 103.84934, 21 Feb 2016, M.K.L. Wong leg., ZRC _ ENT00000699 ; Bukit Timah, 14 Apr 1993, Sk. Yamane leg. (SKYC) ; worker and founding queen, Upper Thomson Nature Park, 9 Dec 2017, Sk. Yamane leg., SG17-SKY-38 (SKYC) .

Material not physically examined. In Schlick-Steiner et al. (2006) - queen, Singapore Zoo, 12 Jan 2002, H. Zettel leg.; queen, National University of Singapore campus, 26-28 Jan 2002, H. Zettel leg.; 15 queens, same locality as previous, 21 Oct - 7 Nov 2003, H. Zettel leg. (all in ZCW).

Literature. Schlick-Steiner et al. (2006); Wang et al. (2018a); Yamane et al. (2022).

Localities. Bukit Timah; Commonwealth Road; Kent Ridge; Mandai; Namly forest; National University of Singapore campus (Clementi/ Kent Ridge, multiple sites); Singapore Zoo; Yishun wasteland.

Habitat/Ecology. This species is associated mostly with young secondary forests of varying disturbance levels in Singapore, including waste woodland secondary forest. Individuals have been collected on bamboo, tree trunks, in decayed wood, and on foliage of Wormia (currently known as ‘ Dillenia’) shrubs/trees.

Remarks. The species has a very broad distribution range throughout most of the Oriental and Indo-Australian realms.