dichopatric speciation A form of allopatric speciation in which portions of a pre-existing population become separated because of the formation of a geographical barrier between them. For example, the advance of glaciers at the start of each glaciation caused the separation of previously continuous species into isolated refuges, where each subpopulation subsequently diverged. Compare peripatric speciation.
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allopatric speciation , allopatric speciation The formation of new species from the ancestral species as a result of the geographical separation or fragmentation of the bree… Separation , sep·a·ra·tion / ˌsepəˈrāshən/ • n. 1. the action or state of moving or being moved apart: the damage that might arise from the separation of parents… Sibling Species , sibling species Species that are identical in outward appearance or very nearly so. Despite the similarity, however, they qualify as species by being… Deme , Deme Deme (pronounced “deem,” from the Greek for “people” and originally referring to a political division within ancient Greece) has been used in bi… Allopatry , allopatry The occurrence of species or other taxa in different geographical regions. Subspecies are allopatric by definition. Compare SYMPATRY. allop… ring species , ring species A group of subspecies that are contiguous along a cline. Members of each population are able to mate successfully with members of adjace…
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