the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [noun] > section Asiphonida > family Mytilidae > genus Modiola > member of (3)
a large and coarse kind of mussel of the genus Modiola; (also) a freshwater mussel, Unio or Anodonta.
A large dark mussel; esp. the northern horse mussel, Modiolus modiolus.
A modiolid bivalve mollusc.