parapatric

Definitions

adjective Occupying geographic areas that are partially overlapping or have a partial barrier between them. Used of organisms, especially populations of the same or closely related species.
adjective Occurring among populations having such a distribution.

adjective biogeography, of organisms Whose ranges do not significantly overlap but are immediately adjacent to each other; they only occur together in the narrow contact zone, if at all.

[para– + Greek patrā, fatherland (from patēr, patr-, father; see pəter- in Indo-European roots) + –ic.]

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In the case of parapatric speciation there is a graduation in gene distribution.

On Thursday, the Legg report will be published along with... 2009
IN allopatric, peripatric, sympatric and parapatric speciation a founder population diverges into two or more species.

On Thursday, the Legg report will be published along with... 2009
An intermediate mechanism is parapatric speciation, which takes place in contiguous, but otherwise geographically isolated allopatric populations.

Archive 2006-05-01 AYDIN 2006
In parapatric speciation, the new species evolve in contiguous populations initially with slight genetic differences.

Archive 2006-05-01 AYDIN 2006
He instead thinks that the current species distribution patterns were due to parapatric mechanisms in a continuous forest.

Archive 2006-05-01 AYDIN 2006
The tension zone model suggests that a parapatric hybrid zone can persist indefinitely under some conditions without genetic differences being lost.

How many species? - The Panda's Thumb 2006
However, most of the hybridising parapatric species pairs have average divergences intermediate between intraspecific and interspecific distances for both cox1 and cob.

ScienceBlogs Channel : Life Science 2009
DNA barcoding, if used as a tool for species discovery, would thus fail to identify hybridising parapatric species pairs.

ScienceBlogs Channel : Life Science 2009