uronema (ciliate) uronema (ciliate) uronema is a genus of ciliates in the family uronematidae. uronema uronema nigricans scientific classification domain: eukaryota (unranked): sar (unranked): alveolata phylum: ciliophora class: oligohymenophorea subclass: scuticociliatia order: philasterida family: uronematidae genus: uronemadujardin, 1841 species several, including: uronema elegans (maupas) hamburger & buddenbrock, 1911 uronema marinum