philasteridae philasteridae philasteridae is a family of ciliates in the order philasterida. philasteridae scientific classification domain: eukaryota (unranked): sar (unranked): alveolata phylum: ciliophora class: oligohymenophorea subclass: scuticociliatia order: philasterida family: philasteridaekahl, 1931 genera helicostoma cohn, 1866 madsenia kahl, 1934 philaster fabre-domergue, 1885 philasterides kahl, 1931 porpostoma moebius, 1888