metopus magnus metopus magnus metopus magnus is a species of metopid first found in soil from the murray river floodplain, australia. this species can be distinguished from its congeners by its large body size and the shape of the macronucleus; this species' micronucleus is located situated in a small macronuclear concavity. metopus magnus scientific classification domain: eukaryota (unranked): sar (unranked): alveolata phylum: ciliophora subphylum: intramacronucleata order: armophorida family: metopidae genus: metopus species: m. magnus binomial name metopus magnusvďačný & foissner, 2016