protocruziea protocruziea protocruziea is a class of ciliates in the subphylum intramacronucleata. protocruziea scientific classification domain: eukaryota clade: diaphoretickes clade: tsar clade: sar clade: alveolata phylum: ciliophora subphylum: intramacronucleata class: protocruziea orders protocruziida jankowski in small & lynn, 1985 synonyms protocruziidia (as a subclass)