Phaeocystida
| Phaeocystida | |
|---|---|
| Auloceros spp. (Aulacanthidae) | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Clade: | Diaphoretickes | 
| Clade: | Sar | 
| Clade: | Rhizaria | 
| Phylum: | Cercozoa | 
| Class: | Thecofilosea | 
| Order: | Opaloconchida | 
| Suborder: | Phaeocystina Haeckel, 1887 | 
| Families | |
Phaeocystida, also known as Phaeocystina, is a group of cercozoans in the class Phaeodarea. It was first described by Ernst Haeckel in 1887 and treated traditionally as a suborder, but later was raised to order level until Cavalier-Smith's classification lowered it again to suborder level. It belongs to the order Eodarida, characterised by simpler silica skeletons or a lack thereof.