What characterizes an ecdysozoan?

Ecdysozoans are characterized by their ability to undergo ecdysis, or molting, which involves shedding their exoskeleton to allow for growth. This group includes organisms such as arthropods, nematodes, and others that possess a tough outer cuticle or exoskeleton. They exhibit a wide range of body plans and adaptations, and their development can involve distinct larval stages. Overall, ecdysozoans are a diverse and ecologically significant group within the animal kingdom.