allopatric
Adjective
Meaning
(of biological species or speciation) occurring in areas isolated geographically from one another
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Examples
As time went on Gould moved away from wedding punctuated equilibrium to allopatric speciation, particularly as evidence accumulated in support of other modes of speciation.
In the experiment, the snails were infected by their sympatric parasites, allopatric parasites and mixed sources of parasites.
Petren, Grant, Grant, and Keller proposed that the speciation of the finches occurred in two parts: an initial, easily observable allopatric event followed by a less clear sympatric event.
New York: Columbia Univ. Press, p. 390. Eldredge and Gould relied upon ordinary speciation, particularly Ernst Mayr's concept of allopatric speciation.
If most evolution happens in these rare instances of allopatric speciation then evidence of gradual evolution in the fossil record should be rare.
Phylogenetic analysis relies on the concept of derived characteristics that are not shared between groups, usually applying to populations that are allopatric (geographically separated) and therefore discretely bounded.