Stygiellidae
| Stygiellidae | |
|---|---|
| Stygiella incarcerata under light microscopy stained with protargol | |
| Velundella nauta under DIC microscopy | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Clade: | Discoba | 
| Class: | Jakobea | 
| Order: | Jakobida | 
| Suborder: | Andalucina | 
| Family: | Stygiellidae Pánek, Táborský & Čepička 2015 | 
| Type genus | |
| Stygiella Pánek, Táborský & Čepička 2015 | |
| Genera | |
| 
 | |
| Diversity | |
| 6 species | |
| Stygiellidae distribution map. | |
Stygiellidae is a family of free-living marine flagellates belonging to the order Jakobida, a deep-branching lineage within the eukaryotic supergroup Discoba. They are unicellular organisms that commonly inhabit anoxic, sulfide-rich and ammonium-rich marine habitats worldwide.