Fulvifomes robiniae is a parasitic polypore with distribution in temperate zones of North America. However, specimens morphologically similar to F. robiniae are found in other parts of America. In addition, species such as F. cedrelae and F. coffeatoporus are related to F. robiniae in morphology. In this work, the material type of F. robiniae, F. cedrelae F. coffeatoporus, F. krugiodendri, F. centroamericanus, and F. swieteniae were revised. Furthermore, phylogenetic inferences of species studied were performed. Based on our results, F. swieteniae and F. centroamericanus are synonymized in F. cedrelae and F. krugiodendri in F. coffeatoporus. Also, F. cedrelae and F. coffeatoporus are confirmed as distinct species of F. robiniae based on molecular data. Additionally, specimens that resemble F. robiniae in northern Argentina were found. Based on morphological, molecular, and ecological data, these specimens are resolved as a distinct entity from F. robiniae. Here presented as new, F. popoffii sp. nov. Illustrations, taxonomic analyses, a discussion is presented, and a Fulvifomes species key from America is provided.