Penetration of the oocyte envelope by spermatozoa in the spider crab.
D000447:Aldehydes; D000818:Animals; D002462:Cell Membrane; D003445:Crustacea / Q000166:cytology* / Q000502:physiology; D005260:Female; D005306:Fertilization; D005557:Formaldehyde; D006652:Histological Techniques; D008297:Male; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D010063:Ovum / Q000166:cytology* / Q000502:physiology; D013094:Spermatozoa / Q000166:cytology* / Q000502:physiology
D000447:Aldehydes; D005557:Formaldehyde