The sibling species Leptidea juvernica and L. sinapis (Lepidoptera, Pieridae) in the Balkan Peninsula: ecology, genetic structure, and morphological variation.

The wood white butterfly Leptidea sinapis and its more recently discovered sibling species L. reali and L. juvernica have emerged as a model system for studying the speciation and evolution of cryptic species, as well as their ecological interactions in conditions of sympatry.