The recent rediscovery and examination of the holotype of Neischnocolus panamanusPetrunkevitch, 1925 and its comparison with type material of the genera BarropelmaChamberlin, 1940 and AmiPérez-Miles, 2008 led us to establish their generic synonymy. Ami species and the monotypic Barropelma parvior (Chamberlin & Ivie, 1936) fit with the diagnostic characters of Neischnocolus, with the presence of modified type I urticating setae and the singular spermathecal morphology. B. parvior is considered a junior synonym of N. panamanussyn. nov. based on genital organ morphology and geographical location. Ami bladesi Pérez-Miles, Gabriel & Gallon, 2008 is also considered a junior synonym of Neischnocolus panamanussyn nov. based on genital organ morphology and geographical location. As a consequence, of the synonymies of the genera Barropelma and Ami with Neischnocolus, seven new combinations are created: N. amazonicacomb. nov., N. armihuarensiscomb. nov., N. caxiuanacomb. nov., N. obscuruscomb. nov., N. pijaoscomb. nov., N. weinmannicomb. nov. and N. yupanquiicomb. nov.