Origin of polytypic
Examples from the Web for polytypic
Historical Examples of polytypic
A discussion of the polytypic species, Hypopachus oxyrrhinus, with a description of a new subspecies.The Amphibians and Reptiles of Michoacn, Mxico
William E. Duellman
Isolation of some sort seems necessary to polytypic evolution.Darwin, and After Darwin (Vol 3 of 3)
George John Romanes
Duellman reviewed the species of the genus occurring in western Mxico and concluded that there were five species (two polytypic).
Darwin was, therefore, of opinion that natural selection is able to bring about polytypic evolution.The Making of Species
In polytypic species, the diagnosis of a subspecies is designed only to distinguish it from other subspecies of that species.