The widespread New World species Olibroporus punctatus Casey, 1890 is diagnosed and illustrated using light microscopy and scanning electron microscopy, and its geographic distribution is mapped. Olibroporus grouvellei (Guillebeau, 1894) (originally in Parasemus Guillebeau) is considered a new junior synonym of O. punctatus. Based on further examination of specimens from the Neotropics, Pycinus Guillebeau, 1893 is reevaluated to be a new junior synonym of Olibroporus Casey, resulting in 12 new combinations. Novel structures imaged using SEM are discussed, and a general discussion of rampant genus-level synonymy in the Phalacridae follows.