Complex sentence: In a large study using mitochondrial and nuclear DNA sequences, Zuccon and colleagues found that the splitting of the subfamily Euphoniinae into two genera was not supported by their data but that a denser sampling of species would be required to resolve the taxonomy of the subfamily.
Split into simpler sentences: In a large study using mitochondrial and nuclear DNA sequences, Zuccon and colleagues found that the splitting of the subfamily Euphoniinae into two genera was not supported by their data. They suggested that a denser sampling of species would be required to resolve the taxonomy of the subfamily.