- Extinct in the wild (EW): 0 species
- Critically endangered (CR): 4 species
- Endangered (EN): 1 species
- Vulnerable (VU): 1 species
- Near threatened (NT): 0 species
- Least concern (LC): 0 species
- Data deficient (DD): 9 species
Species in Chromista (IUCN, 2021-2)
- 15 extant species have been evaluated
- 6 of those are fully assessed [a]
- 0 are not threatened at present [b]
- 6 to 15 are threatened [c]
- 0 to 4 are extinct or extinct in the wild:
- 0 extinct (EX) species
- 0 extinct in the wild (EW)
- 4 possibly extinct [CR(PE)]
- 0 possibly extinct in the wild [CR(PEW)]
- ^ excludes data deficient evaluations.
- ^ NT and LC.
- ^ Threatened comprises CR, EN and VU. Upper estimate additionally includes DD.
