The biological equivalent is "allopatric speciation," an evolutionary process in which one species divides into two because the original homogenous population has become separated and both groups ...

For a summary of these models, see Table 1 ... Grahame, J. W. Sympatric, parapatric or allopatric: The most important way to classify speciation? Philosophical Transactions of the Royal Society ...

Evolution 55: 2070-2087. *Bush, G.L. 1994. Sympatric speciation in animals new wine in old bottles. TREE 9: 285-288. Clarke, B., M.S. Johnson, and J. Murray. Clines in the genetic distance between two ...

The offspring of crosses between related species can sometimes fill a new environmental niche, and such hybridizations may even lead to speciation. In the 20th century, animals such as mules and ...

However, species-level phylogenies and distributions cannot be used to unambiguously prove a particular geographic mode of speciation (e.g., sympatric v. allopatric) because geographical ranges ...

The Midas cichlid fish from the crater lakes of Nicaragua are one of the the best known examples for sympatric speciation. They evolved from a source population into a variety of independent ...