cryptochilum cryptochilum cryptochilum is a genus of marine ciliates in the family cryptochilidae. cryptochilum cryptochilum - illustration in bullettino delle sedute della accademia gioenia di scienze naturali in catania, 1893 scientific classification domain: eukaryota (unranked): sar (unranked): alveolata phylum: ciliophora class: oligohymenophorea subclass: scuticociliatia order: philasterida family: cryptochilidae genus: cryptochilummaupas, 1883 species cryptochilum boreale hentschel, 1924 cryptochilum echini cuenot, 1912 cryptochilum reniforme petz, song & wilbert, 1995 cryptochilum boreale has been recovered from the intestine of echinus esculentus. names brought to synonymy cryptochilum elegans maupas, 1883, a synonym for uronema elegans (maupas, 1883) hamburger & buddenbrock, 1911