Hatzegopteryx
It is unusual because it had a very wide skull with large muscular attachments. The bones had a soft internal texture instead of being hollow. it had a short, robust, and heavily muscled neck  long. This short neck was about half the length of other azhdarchids. The neck could withstand strong bending forces. Hatzegopteryx lived on Hațeg Island, an island in the Cretaceous subtropics within the prehistoric Tethys Sea. It was probably the apex predator of Hațeg Island, tackling larger prey (including dwarf titanosaurs and iguanodontians) than other azhdarchids.