paramecium woodruffi paramecium woodruffi paramecium woodruffi is a species of unicellular organisms belonging to the genus paramecium of the phylum ciliophora. it was first isolated in 1928 by d. h. wenrich. it is a member of the paramecium aurelia species complex. paramecium woodruffi scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: alveolata phylum: ciliophora class: oligohymenophorea order: peniculida family: parameciidae genus: paramecium species: p. woodruffi binomial name paramecium woodruffiwenrich, 1928