Which phylum forms a connection between the chordates and the nonchordates? The phylum forms an evolutionary connection between the nonchordates and the chordates.

The phylum Hemichordata is the one that could form an evolutionary connection between the chordates and non-chordates.

Explanation:

To the phylum Hemichordata belongs a genus that scientists believe could explain how the chordates could evolve from the non-chordates. This genus is Balanoglossus, of the class Enteropneusta.

Balanoglossus is similar to a worm, whose habitat is the seabed, and like other hemicordates it has a stomach, a structure that forms part of its digestive system and fulfills the functions of a spine.

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Chordates and non-chordates link