Spinoraptor

Spinoraptor (name meaning Spine thief) is a Late Cretaceous species of Dromaeosaurid from the Late Cretaceous Africa from around 83 million years ago to 66 million years ago. It is one of the strangest Dromaeosaurid in existence, having a tall Spinosaur-looking sail, but unlike a Spinosaur, its sail was more than likely a feathery hump as some studies suggests, most likely as a form of fat preserve in case the area the raptor lived in was facing droughts. It was one of the largest Dromaeosaurids on Earth, growing up to about 25 to about 30 feet long, much bigger than even the biggest Dakotaraptor or even the Utahraptor, likely due to abundance of fish and other aquatic animals, the Spinoraptor's main food source, as well as this animal filling the niche left behind by the extinct species of mostly-aquatic Spinosaurus (other than the surviving African Dragon) and the completely extinct killer Spinosaurothoides, both of which went extinct due to the area the both lived in dried up. Spinoraptor was among the last non-avian African Mesozoic dinosaurs, living throughout most of the Late Cretaceous until they finally went extinct due to the K-T mass extinction.