title: The fine structure of spermatid differentiation in the mussel, Mytilus edulis.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002467:Cell Nucleus; D004721:Endoplasmic Reticulum; D008297:Male; D008854:Microscopy, Electron; D008928:Mitochondria; D008974:Mollusca / Q000166:cytology*; D013094:Spermatozoa / Q000166:cytology*