title: Sperm differentiation in cestodes.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D002454:Cell Differentiation; D002589:Cestoda / Q000502:physiology* / Q000648:ultrastructure; D008297:Male; D013091:Spermatogenesis; D013094:Spermatozoa / Q000648:ultrastructure*