The curious case of the lateral-spined egg: Schistosoma mansoni.
D000818:Animals; D005260:Female; D049673:History, 20th Century; D010063:Ovum / Q000166:cytology; D010274:Parasitology / Q000266:history*; D012548:Schistosoma haematobium / Q000166:cytology; D012550:Schistosoma mansoni / Q000166:cytology*