endomyxa endomyxa endomyxa is a group of eukaryotic organisms in the supergroup rhizaria. they were initially a subphylum of cercozoa and later a subphylum of retaria, but several analyses have proven they are a phylogenetically separate lineage, and endomyxa is currently regarded as its own phylum. endomyxa gromia brunneri scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: rhizaria phylum: endomyxacavalier-smith 2002, emend. bass & berney in adl et al. 2019 subgroups vampyrellida phytomyxea filoreta gromia ascetosporea