Final answer:
Coelurosaurs developed a clawed hand as one of their key evolutionary novelties, distinguishing them from other reptiles and aiding in their survival and adaptation.
Step-by-step explanation:
The evolutionary novelties of coelurosaurs include a clawed hand. These were theropod dinosaurs that exhibited a number of physical adaptations. Coelurosaurs are known for their diverse group which evolved into birds, as well as a wide variety of other forms. One of the key characteristics that defined them was the modification of their hands into clawed appendages. This feature was crucial for their varied ecological roles, including hunting and grasping prey. Unlike the crocodilians that had a basic body plan which has changed little over time, coelurosaurs were part of the dinosaur clade that went through significant evolutionary changes.
The evolutionary novelties of coelurosaurs include elongate rostrum, elongate forelimbs, and a clawed hand.
Coelurosaurs are a group of theropod dinosaurs that include birds and other feathered dinosaurs. These features helped them adapt to their environment and perform specialized functions. The elongate rostrum, or snout, allowed for increased range of motion and helped in feeding. The elongate forelimbs and clawed hand were associated with improved grasping and manipulating objects.