Do Amphioxus Have a Backbone?
The Phylum Chordata Comprises Cephalochordates (Amphioxus or Lancelets), Urochordates (Tunicates), and Vertebrates. .. . 1910), Amphioxus Was a Highly...
The phylum Chordata comprises cephalochordates (amphioxus or lancelets), urochordates (tunicates), and vertebrates. ... 1910), amphioxus was a highly degenerate vertebrate that had lost its skeleton and complex cranial region.
Is amphioxus a vertebrate?
Cephalochordates, commonly called amphioxus or lancelets, are marine invertebrate chordates. They were traditionally held as the closest living relatives of vertebrates and have long occupied a key phylogenetic position in our discussions on the origin of vertebrates.
Why is amphioxus not a vertebrate?
From the given organisms, the Amphioxus is a chordate but not a vertebrate. Amphioxus, commonly known as lancelet, is a marine fish like chordate that possesses a dorsal nerve cord which is not protected by bone but by a simple notochord made up of a cylindrical cell pattern, closely packed to form a toughened rod.
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