Multiple choice Which of the following do not belong to phylum Chordata? Mammals Birds Snails Sea squirts Amphibians Reveal answer Fill a bubble to check yourself C Correct answer Explanation Yes, it is correct. Snails do not belong to phylum Chordata. Snail belongs to Mollusca. Molluscs have soft bodies that consist of three basic parts: a foot, a visceral mass and a mantle.