polytypism The occurrence of phenotypic variations between populations or groups of a species that are geographically distinct. It is contrasted with polymorphism, which is variation within a population or group. A species with systematic geographical variation (subspecies or clines) is said to be polytypic.

polytypism The occurrence of phenotypic variations between populations or groups of a species that are geographically distinct. It is contrasted with polymorphism, which is variation within a population or group. A species with systematic geographical variation (subspecies or clines) is said to be polytypic.

polytypism The occurrence of phenotypic variations between populations or groups of a species that are geographically distinct. It is contrasted with polymorphism, which is variation within a population or group. A species with systematic geographical variation (subspecies or clines) is said to be polytypic.