Glycymeris decussata

{{Short description|Species of bivalve}}

{{Speciesbox

| image =Naturalis Biodiversity Center - RMNH.MOL.315715 - Glycymeris decussata (Linnaeus, 1758) - Glycymerididae - Mollusc shell.jpeg

| genus = Glycymeris

| species = decussata

| authority = (Linnaeus, 1758)

}}

Glycymeris decussata, or the decussate bittersweet, is a species of bivalve mollusc in the family Glycymerididae. It can be found in Caribbean waters, ranging from Florida to the West Indies and Brazil.Abbott, R.T. & Morris, P.A. A Field Guide to Shells: Atlantic and Gulf Coasts and the West Indies. New York: Houghton Mifflin, 1995. 13.