Carebara affinis (Jerdon, 1851)

Material examined. Lower Peirce Reservoir, Forest A, 7 Aug 1990, Zoology Dept 3 rd Year project students, ZRC _ ENT00000192 ; same locality as previous, Forest B, 25 Aug 1990, Zoology Dept 3 rd Year project students, ZRC _ ENT00000113; Lorong Banir, NS 192, 16 Jun 1995, Yang & Lua leg., ZRC _ ENT00000376 ; Bukit Timah, Hindhede Drive, 25 Dec 1989, H.K. Lua leg., ZRC _HYM_00000130; Pulau Ubin, 7 Jan 2014, Sk. Yamane leg., ZRC _HYM_00000434-435, 482-483; University Campus Botany Garden, 11 Feb 1977, D.H. Murphy leg., ZRC _HYM_0000913; Mandai Road, 1.41119, 103.80513, 29 Nov- 1 Dec 2016, G.W. Yong leg., pitfall trap, M3D3GPc806, ZRC _HYM_0001770; Bukit Batok East Avenue 6, 1.34304, 103.76235, 3-5 Oct 2016, G.W. Yong leg., pitfall trap, BB1GPd382, ZRC _HYM_0001771; Mandai forest, 7 Jun 2018, W. Wang leg., ZRC _ ENT00047996 ; male, University Town (NUS), 1.30622, 103.77458, 29 Apr-6 May 2015, M.S. Foo & W. Wang leg., NUS0023, malaise trap, ZRC _ BDP0044771 .

Material not physically examined. Unknown.

Literature. Viehmeyer (1916). Overbeck (1924), Yamane (2003) [all as Pheidologeton affinis]. Wang et al. (2018a).

Localities. Bukit Batok East; Bukit Timah Hindhede Drive; Bukit Timah Road; Lorong Banir; Lower Peirce Reservoir; Mandai; University Town (NUS).

Habitat/Ecology. This species was found in both mature and young secondary forests at varying levels of disturbances, including native-dominated and abandoned plantation secondary forests. Individuals have been collected occasionally in disturbed forest fragments in semi-urban settings, or in cultivated gardens. The species has sometimes been collected from leaf litter or decayed wood.

Remarks. Considerable morphological variation was observed among different colonies of C. affinis, but we lack convincing empirical evidence supporting further species delimitation for this possible species complex at the time of writing. Thus, in this checklist, we tentatively treat all morphological variants as conspecific.