Definition
The chordate family is the group of animals sharing key features like a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail at some point in their development. It includes vertebrates like fish, amphibians, reptiles, birds, and mammals, as well as invertebrates like tunicates and lancelets. Think of it as a huge, diverse family reunion. They're united by common ancestry and these shared embryonic features. Chordates occupy a wide range of ecological niches and exhibit an incredible array of adaptations. 👨👩👧👦 It's like the ultimate evolutionary success story.