Data from: Ecological speciation in sympatric palms: 4. Demographic analyses support speciation of Howea in the face of high gene flow

The idea that populations must be geographically isolated (allopatric) to
evolve into separate species has persisted for a long time. It is now
clear that new species can also diverge despite ongoing genetic exchange,
but few accepted cases of speciation in sympatry have held up when
scrutinised using modern approaches. Here, we examined evidence for
speciation of the Howea palms of Lord Howe Island, Australia, in light of
new genomic data. We used coalescence-based demographic models combined
with double digest restriction-site associated DNA sequencing of multiple
individuals and provide support for previous claims by Savolainen et al.
(Nature 441: 210–213, 2006) that speciation in Howea did occur in the face
of gene flow.