What is it about?
This paper uses published data to calculate overall reproductive isolation among members of the H. cydno-H, melpomene clade. Despite claims of widespread hybridization and introgression of wing pattern alleles, this analysis suggests that the butterflies in this group never exchange alleles.
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Why is it important?
This result pulls some more stuffing out of the homoploid hybrid speciation hypothesis for the origin of Heliconius heurippa, and supports the idea that Müllerian mimicry among Heliconius species is a result of convergent evolution rather than horizontal transfer of wing pattern alleles.
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This page is a summary of: Quantified reproductive isolation in Heliconius
butterflies: Implications for introgression and hybrid speciation, Ecology and Evolution, December 2017, Wiley,
DOI: 10.1002/ece3.3729.
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