Leech
- kingdom: Animalia
- phylum: Annelida
- class: Clitellata
- order: Rhynchobdellida
- family: Glossiphoniidae
- genus: Helobdella
- species: Helobdella triserialis
Hamden- Litchfield
- New Haven
- Wallingford
- Wallingford Center
Connecticut
United States