coelodendridae coelodendridae coelodendridae is a family of cercozoans in the order phaeodendrida. coelodendridae scientific classification domain: eukaryota (unranked): sar (unranked): rhizaria phylum: cercozoa class: phaeodarea order: phaeodendrida family: coelodendridaehaeckel, 1887 genera coelodendrum