Molecular studies might also resolve the long-running debate on the relative importance of allopatric and parapatric modes of speciation. Nature Reviews Genetics - Genes and speciation.

Speciation JA Coyne H Allen Orr Sinauer Associates Inc., Massachusetts, USA; 2004. 545 pp., paperback, £34.99 ISBN 0878930892. So effusive was Axel Meyer's appreciation of ‘Speciation’ in ...

I. Allopatric vs. sympatric speciation (+ parapatric) Almost certainly most speciation occurs allopatrically (that is, when the forms occur in different places). The main driving forces appear to be ...