Speciation

n. evolutionary development of a new species usually through the division of a single species into two separate genetically different groups (Biology)

Speciation is the evolutionary process by which new biological species arise. There are four modes of natural speciation, based on the extent to which speciating populations are geographically isolated from one another:  allopatric, peripatric, parapatric, and sympatric. Speciation may also be induced artificially, through animal husbandry or laboratory experiments. Observed examples of each kind of speciation are provided throughout.
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Noun
1. the evolution of a biological species
(hypernym) evolution, phylogeny, phylogenesis
(derivation) speciate, differentiate, specialize, specialise

It is now almost universally agreed that the prevailing process of speciation is geographical (allopatric) speciation. (There are also parapatric and sympatric speciation concepts.) According to biological species concept, however, species are defined as aggregation of populations that are reproductively isolated from one another. Link to a lecture on

speciation /,spi:ʃi'eiʃn/
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