Evolution of parasitism Understanding start with basic concept of symbiosis Symbiosis was first coined by the german de bary in 1879-to mean"living together". It was originally coined to refer to all cases where dissimilar organisms or species live together in an intimate associationUnderstanding start with basic concept of symbiosis • Symbiosis was first coined by the German de Bary in 1879 - to mean “living together”. It was originally coined to refer to all cases where dissimilar organisms or species live together in an intimate association Evolution of parasitism