Saxidomus nutalli, the California butterclam or butternut clam, is a species of large edible saltwater clam, a marine bivalve mollusk in the family Veneridae, the venus clams.
This is a commercially exploited species that attains a length of approximately 15 cm.
This species was harvested by Chumash peoples on the central California coast, at least as early as the Millingstone Horizon.
- ^ ITIS, 2008
- ^ Intertidal, 2008
- ^ C.M.Hogan, 2008
- NTIS Report: Saxidomus nutalli 
- Intertidal Marine Invertebrates of the South Puget Sound (2008) 
- C.Michael Hogan (2008) Morro Creek, The Megaltihic Portal, editor Andy Burnham