Freshwater triclads (Platyhelminthes, Turbellaria) and continental drift.
D000349:Africa; D000818:Animals; D001208:Asia; D001315:Australia; D004463:Ecology; D005060:Europe; D005843:Geography; D009656:North America; D010163:Paleontology; D013020:South America; D014419:Turbellaria / Q000145:classification