Chasmatonotus unimaculatus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Diptera
- family: Chironomidae
- genus: Chasmatonotus
- species: Chasmatonotus unimaculatus
Paxton- West Concord
Massachusetts- Raritan
- Somerville
New Jersey
United States