Hortonella
| Hortonella Temporal range:   | |
|---|---|
| Scientific classification | |
| Clade: | Archaeplastida | 
| Division: | Rhodophyta | 
| Class: | Florideophyceae | 
| Stem group: | Corallinales | 
| Family: | †Archaeolithophyllaceae | 
| Genus: | †Hortonella | 
Hortonella is a fossil genus of alga that has been placed deep in the coralline stem group on the basis of its scarcely differentiated thallus.