discosphaera tubifer discosphaera tubifer discosphaera tubifer (original name: discosphaera tubifera) is a marine, unicellular species of coccolithophore in the genus discosphaera. it exhibits a very delicate structure and arrangement of coccoliths. discosphaera tubifer scientific classification domain: eukaryota kingdom: chromista (unranked): hacrobia phylum: haptophyta class: prymnesiophyceae order: syracosphaerales family: rhabdosphaeraceae genus: discosphaera species: d. tubifer binomial name discosphaera tubifer