Science · 1964 · 134 citations · 0 references
Life SciencesBiologyEvolutionary BiologyPhylogeneticsSpeciationSystematic PaleontologyPhylogenetic Comparative MethodsProtozoan EvolutionProtozoan Host-parasite InteractionsProtozoan MorphologyProtozoan SystematicsProtozoan TaxonomyMetazoan ParasitesProtozoan ClassificationProtozoan Evolutionary EcologyProtozoan Evolutionary RelationshipsProtozoan Phylogeny