what are agnathostoma of chordates
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Animals in the phylum Chordata share four key features: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
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Panel A, The chordates are a monophyletic assemblage that can be divided into three subphyla: protochordates, (Amphioxus and the tunicates), Agnatha (hagfish and lamprey), and Gnathostoma (cartilaginous fishes, bony fishes).
lower classification: cartilaginous fishes, tetrapods
phylum: chordata
Scientific name: Gnathostomata
Higher classification: Vertebrate
Rank: Infraphylum
Clade: Olfactores
Subphylum: Vertebrata
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