Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Bikonta - bikonts |
| Corticata | |
| kingdom | Chromalveolata Adl et al., 2005 |
| superphylum | Alveolata Cavalier-Smith, 1991 - alveolate |
| phylum | Ciliophora Doflein, 1901 - ciliate |
| subphylum | Intramacronucleata Lynn, 1996 |
| class | Litostomatea Smal & Lynn, 1981 |
| subclass | Trichostomatia Bütschli, 1889 |
| order | Vestibuliferida de Puytorac et al., 1974 |
| family | Pycnotrichidae Poche, 1913 |
| genus | Vestibulongum Grim, 1988 |