title: [Ultrastructural aspects of spermiogenesis in Polycelis tenuis and Polycelis nigra (planarians)].
mesh_terms: D000818:Animals; D002466:Cell Nucleolus / Q000166:cytology; D002843:Chromatin; D003593:Cytoplasm; D005407:Flagella; D008297:Male; D008566:Membranes; D008854:Microscopy, Electron; D008870:Microtubules; D008928:Mitochondria; D013091:Spermatogenesis; D013094:Spermatozoa / Q000166:cytology; D014419:Turbellaria / Q000166:cytology*
chemical_list: D002843:Chromatin
vernacular_title: Quelques aspects ultrastructuraux de la spermiogenèse chez Polycelis tenuis et Polycelis nigra (planaires.