Should snails and butterfly's be placed in the same phylum?

No, snails and butterflies should not be placed in the same phylum. Snails belong to the phylum Mollusca, which includes soft-bodied animals often with shells, while butterflies are classified under the phylum Arthropoda, characterized by jointed limbs and exoskeletons. These two groups are fundamentally different in their body structure, reproductive methods, and evolutionary history. Thus, they occupy distinct taxonomic classifications.