leucodictyon leucodictyon leucodictyon is a genus of cercozoa. leucodictyon scientific classification domain: eukaryota (unranked): sar (unranked): rhizaria phylum: cercozoa order: leucodictyida family: leucodictyidae genus: leucodictyongrell, 1991 species: l. marinum binomial name leucodictyon marinumgrell, 1991 it includes the species leucodictyon marinum.