Isolation on separate islands, combined with unique environmental pressures associated with an insular existence, likely contributed to allopatric speciation of Zamia
hamannii and Z. nesophila from their mainland counterparts (in as little as 5,000–10,000 years!)
•Similar evolutionary processes (i.e., allopatry)
likely played a role in
allopatric speciation of the inland species, Zamia imperialis and Z.
•Zamia skinneri (as
characterized here) appears to be unique within this group…