 Ryvarden and Dhandha had previously (1975) used this combination of characters to erect "Cystostiptoporus", a genus that had "Cystostiptoporus indicus" as the type species.Due to the Principle of Priority, the earlier-published name is preferred, and "Cystostiptoporus" was therefore sunk into synonymy with "Microporellus".In 1987, E. J. H. Corner further emended "Microporellus" by including species without cystidia, and also some trimitic species.