Cyclosternum bicolor (Schiapelli & Gerschman, 1945) is regarded as the senior synonym of Cyriocosmus chicoi Pérez-Miles, 1998 as they share the same collecting site, same collector and same distinct abdominal pattern giving the new combination Cyriocosmus bicolor comb. nov.

Journal of the British Tarantula Society 32(1): 10-12