| Protoopalina | |
|---|---|
| Protoopalina pingi | |
| Scientific classification | |
| (unranked): | SAR |
| Superphylum: | Heterokonta |
| Phylum: | Placidozoa |
| Class: | Opalinea |
| Order: | Opalinida |
| Family: | Opalinidae |
| Genus: | Protoopalina |
Protoopalina is a genus of heterokonts.
Examples are Protoopalina intestinalis and Protopalina pingi.