title: Ultrastructural topography of trematode eggshell.
mesh_terms: D000818:Animals; D001717:Birds; D004528:Egg Shell; D005260:Female; D005399:Fishes; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D010063:Ovum / Q000166:cytology; D014200:Trematoda / Q000166:cytology*