title: The Bulinus natalensis-tropicus complex (Basommatophora: Planorbidae) in south-eastern Africa. I. Shell, mantle, copulatory organ and chromosome number.
mesh_terms: D000351:Africa, Eastern; D000353:Africa, Southern; D000818:Animals; D002033:Bulinus / Q000033:anatomy & histology* / Q000145:classification; D002875:Chromosomes; D004199:Disease Vectors; D004463:Ecology; D012547:Schistosoma; D012552:Schistosomiasis / Q000209:etiology