Cohesion species concept

The cohesion species concept defines species as ' the most inclusive group of organisms having the potential for genetic and or demographic exchangeability' (Templeton 1989). Templeton (1989) argued that one of the main weaknesses of the biological species concept was its lack of applicability to either asexual organisms or to taxa belonging to syngameons. In Templeton's (1989) terminology the difficulty resulted from either 'too little' or 'too much sex'. Templeton (1989) proposed the cohesion...