title: The ultrastructure of Dentalium egg at the trefoil stage.
mesh_terms: D000818:Animals; D002462:Cell Membrane; D005260:Female; D002479:Inclusion Bodies; D008854:Microscopy, Electron; D008928:Mitochondria; D008974:Mollusca / Q000196:embryology*; D010063:Ovum / Q000166:cytology* / Q000254:growth & development