(from peer review comments:)
- A more extensive discussion of the Galapagos would be useful, as it's the best-known example of the phenomenon.
- A discussion of phylogenetics and the measurement of species coalescence times might be a good expansion.
- The "observed examples" link to talk.origins is well-researched and useful as an external link, but surely there's a more academic compilation somewhere?
(from Samsara)
- Speciation by polyploidy
- better in a separate section, that then also mentions that it does not depend on any degree of spatial isolation
- Discussion of pre-zygotic vs. post-zygotic isolation
- Explicit treatment of sexual selection and assortative mating
- The possible role of punctuated equilibrium, esp. in peripatric speciation