| Fessisentis | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Acanthocephala |
| Class: | Palaeacanthocephala |
| Order: | Echinorhynchida |
| Family: | Fessisentidae Van Cleve, 1931 |
| Genus: | Fessisentis Van Cleve, 1931 |
Fessisentis is a genus of parasitic spiny-headed (or thorny-headed) worms. It is the only genus in the family Fessisentidae. This genus contains six species that are distributed across the Eastern continental United States as far west as Oklahoma and Wisconsin. These worms parasitize salamanders and fish.