polytypic

A discussion of the polytypic species, Hypopachus oxyrrhinus, with a description of a new subspecies.

In polytypic species, the diagnosis of a subspecies is designed only to distinguish it from other subspecies of that species.

The bar of mutual sterility, whenever and wherever it occurs, must always render polytypic evolution possible.

It has been shown that divergent or polytypic evolution on common areas is inexplicable by natural selection alone.

Had he gone a step further, he must have seen that separation, in some form or another, is "indispensable" to polytypic evolution.