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'''Chordata''' is a [[phylum]] of [[animal]]s, named after their possession of a [[notochord]] at some point during their lives (embryonic, juvenile, or adult). Chordates have four other unifying characteristics, also possessed at some life stage: a dorsal [[nerve]] cord, an endostyle, a post-anal [[tail]], and [[pharyngeal pouches]]. Most chordates have a [[spinal cord]], and are therefore [[vertebrates]].

'''Chordata''' is a [[phylum]] of [[animal]]s, named after their possession of a [[notochord]] at some point during their lives (embryonic, juvenile, or adult). Chordates have four other unifying characteristics, also possessed at some life stage: a dorsal [[nerve]] cord, an endostyle, a post-anal [[tail]], and [[pharyngeal pouches]]. Many chordates have a [[spinal column]], and are therefore [[vertebrates]].

The phylum includes several [[class (biology)|classes]], the most well-known of which are vertebrates:

The phylum includes several [[class (biology)|classes]], the most well-known of which are vertebrates: