Complex sentence: The location of the gland is between the Dufour's gland and the ducts of venom, and there are more derived characters of the sting apparatus in "Nothomyrmecia" than "Myrmecia".
Split into simpler sentences: The location of the gland is between the Dufour's gland and the ducts of venom. More derived characters of the sting apparatus are known than those of "Myrmecia".