| The allopatry of Middle American subspecies, and their diversification, may be attributable to habitat preferences. |
| In general, sizes of island individuals are approximately intermediate in size between those in the region of origin and those in the region of allopatry. |
| The observed strong phenotypic similarity was preserved under speciation through complete allopatry. |
| The predominant view is that new species arise most often in allopatry where geographically isolated populations of the same ancestral species diverge progressively. |
| In particular what we've done is reverse the natural laws of what's called migration allopatry. |
| And third, differentiation may have evolved in allopatry as a contiguous ancestral population became fragmented by vicariance. |
