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 (vī-kâr′ē-əns, vĭ-)
The division of a widespread group of organisms by a geographic barrier, such as a mountain range or a body of water, often resulting in the evolution of related species on either side of the barrier.

[Latin vicārius, substitute (since after a vicariant speciation event, one species can be thought of as "substituting for" a related species on the other side of the geographic barrier); see vicarious + -ance.]

vi·car′i·ant adj. & n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(vɪˈkɛərɪənt; vaɪ-)
(Biology) any of several closely related species, races, etc, each of which exists in a separate geographical area: assumed to have originated from a single population that became dispersed by geological events
[C20: from Latin vicārius (see vicar) + -ant]
viˈcariance n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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References in periodicals archive ?
These species belong to a flora with connections by the route Parana-Uruguay rivers (Rambo 1961) and constitute relicts from an ancient flora widely distributed and fragmented with vicariant events, mainly the development of a savannah corridor during the Cenozoic era (Ponce et al., 2002; Morrone, 2006; Arana et al., 2013, 2016).
In contrast, ancient paleoendemics may have evolved via gradual speciation through biotype depletion, including via allopatric (vicariant) speciation, as has been shown for the Streptanthus glandulosus complex (Mayer & Soltis, 1994), Caulanthus amplexicaulis var.
Populations of two species of ambystomatid salamanders were compared to determine if any variation exists as a result of a vicariant event.
This is a particular group of communities as they represent a physiognomic type that is endemic in the southern hemisphere, occurring in the Valdivian-Magellanian region and also in Tasmania and New Zealand, with which they share genera but differ in their vicariant species (Godley, 1960; Wardle, 1991; Wardle et al., 2001; Ramirez et al., 2014a).
Population connectivity and phylogeography of a coastal fish, Atractoscion aequidens (Sciaenidae), across the Benguela Current region: Evidence of an ancient vicariant event.
(2003) showed that the presence of the two major haplotypes was the result of historical vicariant and migratory events of loggerhead sea turtles between the eastern coast of North America and the Mediterranean.
Lovato, "Phylogeographical structure of the neotropical forest tree Hymenaea courbaril (Leguminosae: Caesalpinioideae) and its relationship with the vicariant Hymenaea stigonocarpa from Cerrado," Journal of Heredity, vol.
The relationship between these two concepts is understood as vicariant, that is, one replaces the other according to how the relationship is guided with the individuals and the environment provided.
The Bahamas, as part of The Greater Antilles (which includes the major islands of Cuba, Hispaniola, Jamaica and Puerto Rico), has experienced vicariant events through repeated cycles of submergence and emergence over the past 3 million years.
Vicariant speciation of curassows (Aves, Cracidae): a hypothesis based on mitochondrial DNA phylogeny.