Between brackets is the number of accepted marine extant species
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Shows the number of accepted marine extant species within the taxon
The last expanded taxon is highlighted
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- Biota (247 582)
- Kingdom Animalia (211 546)
- Kingdom Archaea (117)
- Kingdom Bacteria (2 223)
- Kingdom Chromista (20 791)
- Subkingdom Chromista incertae sedis (5)
- Subkingdom Chromobiota
- Subkingdom Cryptista accepted as Cryptophyta
- Subkingdom Hacrobia (568)
- Subkingdom Harosa (18 423)
- Infrakingdom Alveolata (5 969)
- Phylum Ciliophora (2 677)
- Subphylum Intramacronucleata (2 369)
- Infraphylum Intramacronucleata incertae sedis (25)
- Infraphylum Rhabdophora (222)
- Class Litostomatea (222)
- Subclass Haptoria (221)
- Subclass Trichostomatia (1)
- Order Vestibuliferida (1)
- Family Balantidiidae Reichenow in Doflein & Reichenow, 1929 (1)
- Genus Balantidium Claparède & Lachmann, 1858 (1)
- Species Balantidium sigani Diamant & Wilbert, 1985
- Infraphylum Spirotrichia (350)
- Infraphylum Ventrata (1 088)
- Class Oligotrichea (684)
- Subphylum Postciliodesmatophora (308)
- Class Kinetofragminophora
- Class Polyhymenophora accepted as Postciliodesmatophora
- Phylum Myzozoa (3 292)
- Infrakingdom Heterokonta (2 795)
- Infrakingdom Rhizaria (9 658)
- Phylum Chromeridophyta (1)
- Phylum Bacillariophyta (1)
- Phylum Chrysophyta accepted as Chrysophyceae
- Phylum Heterokontophyta (1 794)
- Phylum Xanthophyta accepted as Xanthophyceae
- Kingdom Fungi (1 432)
- Kingdom Monera represented as Bacteria
- Kingdom Plantae (10 581)
- Kingdom Protozoa (766)
- Kingdom Viruses (115)
