philasterida philasterida philasterida (the philasterid ciliates) is an order of ciliates in the subclass scuticociliatia. philasterida uronema nigricans scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: alveolata phylum: ciliophora class: oligohymenophorea subclass: scuticociliatia order: philasteridasmall, 1967 families cinetochilidae cohnilembidae cryptochilidae entodiscidae entorhipidiidae loxocephalidae orchitophryidae paralembidae parauronematidae philasteridae pseudocohnilembidae schizocaryidae thigmophryidae thyrophylacidae uronematidae philasterida incertae sedis