nanofila nanofila nanofila (from latin nanos 'tiny', and fila 'threads') is a genus of marine heterotrophic protists of the phylum cercozoa. it is the only genus in the family nanofilidae. it is a monotypic genus, with the sole species n. marina. nanofila scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: cercozoa class: granofilosea order: cryptofilida family: nanofilidaecavalier-smith & bass, 2009 genus: nanofilacavalier-smith & bass, 2009 species: n. marina binomial name nanofila marinacavalier-smith & bass, 2009 type strain usnm51490 morphology nanofila are small amoebae with unbranched, granular filopodia. they lack cilia, have a spherical shape of around 3 μm in diameter, and extend about six extremely thin filopodia that lie flat against the substrate.