title: A correlated thin-selection freeze-fracture study on plasmalemmal and mitochondrial membrane specializations in the principal piece of spermatozoa from the chilopodan Lithobius forficatus L.
mesh_terms: D000818:Animals; D001181:Arthropods / Q000648:ultrastructure; D002462:Cell Membrane / Q000648:ultrastructure; D005614:Freeze Fracturing / Q000379:methods; D008297:Male; D008855:Microscopy, Electron, Scanning; D008928:Mitochondria / Q000502:physiology / Q000648:ultrastructure*; D013087:Spermatids / Q000502:physiology / Q000648:ultrastructure; D013091:Spermatogenesis; D013094:Spermatozoa / Q000502:physiology / Q000648:ultrastructure*