I find it useful to search for (historically) edible plants by searching for “edulis” is the taxon search, these two aren’t plants and seem particularly singled-out:
- Trichonephila edulis - a spider
- Pyxicephalus edulis - a bull frog
Note: I think “edulis” should be treated with caution. In practice it’s somewhat dubious and tends to mean “barely edible”.