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.