PachykellyaPachykellya is a genus of very small saltwater clams, marine bivalve molluscs in the family Neoleptonidae.SpeciesSpecies in the genus Pachykellya include:Pachykellya bernardi Powell, 1927Pachykellya concentrica Powell, 1927Pachykellya edwardsi Bernard, 1897Pachykellya minima Powell, 1931Pachykellya rotunda Powell, 1927