gromiida gromiida gromiida is an order of cercozoans. it is the only order in the class gromiidea. gromiida gromia (1) and some foraminiferans (2-7) scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: endomyxa class: gromiideacavalier-smith, 2003 sensu bass et al., 2009 order: gromiidaclaparède & lachmann, 1856 families gromiidae psammonobiotidae golemansky, 1974, emend meisterfeld, 2002 pseudodifflugiidae taxonomy class gromiidea cavalier-smith 2003 sensu bass et al. 2009 order gromiida claparède & lachmann 1856 s.s. family gromiidae ruess 1862 genus gromia dujardin 1835