massisteriidae massisteriidae massisteriidae is a family of granofilosean protists within the phylum cercozoa. massisteriidae scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: cercozoa class: granofilosea order: leucodictyida family: massisteriidaecavalier-smith, 1993 genera massisteria minimassisteria taxonomy massisteriidae contains two genera: massisteria larsen & patterson, 1990 massisteria marina larsen & patterson, 1990 massisteria voersi mylnikov & wylezich, 2015 minimassisteria arndt & cavalier-smith, 2011 minimassisteria diva arndt & cavalier-smith, 2011