vicariadn.
/vɪˈkɛːrɪad/ Ecology.
= vicariant n.
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the world > life > biology > biological processes > evolution > [noun] > parallelism or vicariance
parallelism1868
vicariism1939
vicariad1944
vicariant1952
vicariance1957
1944 S. A. Cain Found. Plant Geogr. xviii. 266 Most of the studies of vicariads have referred to species.
1960 N. Polunin Introd. Plant Geogr. vii. 202 True vicariads (which have arisen from a common stock) should be distinguished from false ones which have not this close genetic relationship... True vicariads..may be classified according to the manner of their separation from one another into (1) horizontal (geographical), (2) altitudinal (physiographic), (3) habitat (ecological), and (4) seasonal (..closely related forms differing in their times of development).
1972 D. M. Moore in D. H. Valentine Taxonomy, Phytogeogr. & Evolution viii. 119 The aquatic Littorella, absent from North America, is effectively an amphitropical vicariad and certainly results from a much more recent migration.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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n.1944