Sphaerexochus calvus
- kingdom: Animalia
- phylum: Arthropoda
- class: Trilobita
- order: Phacopida
- family: Cheiruridae
- genus: Sphaerexochus
- species: Sphaerexochus calvus
Dudley
England
United Kingdom
Cedarville
Ohio
United States
Sphaerexochus calvus Dudley Cedarville