Chapman & Capco, 1951: 115, 118 (Asia Atopula, Paratopula); Bolton, 1995b: 312.
Bolton, 1988b: 125 (diagnosis, review of genus, all species revision, worker key, male key); Bolton, 1995a: 1051 (census); Eguchi et al., 2011: 22 (diagnosis, Vietnam synopsis); Xu & Xu, 2011: 595 (all species key); Luo & Guénard, 2017: 10 (all species key); Cantone, 2017: 225 (brief male diagnosis).
Extant: 12 valid species (1 unavailable), 0 valid subspecies (1 synonym)