DOI: https://doi.org/10.1515/vzoo-2015-0039
The heterogeneity of formation of diff erent areas in the wing membrane of Ñhiroptera and Dermoptera was established. The web between metacarpals and digits (chiropatagium) was formed by the mesenchyme which initially formed the forelimb rudiment. The plagiopatagium and propatagium were formed by proliferation of the trunk mesenchymal cells.