The Microsporidia are spore-forming obligate parasites, whose taxonomic history has fluctuated for over a century. Morphological and genetic methods have created a plethora of taxa, but the formality of these taxa is questionable. By bringing together experts in microsporidian taxonomy, and representatives from fields in which microsporidians are pervasive (eg Agriculture, Aquaculture), we will develop agreeable Microsporidia Taxonomic Criteria (MTCs), which taxonomists can use as the foundation of new discoveries.
