This general category of conical shell is technically known as " patelliform ", meaning dish-shaped.
2.
"' Umbraculoidea "'is a superfamily of unusual false limpets with a thin soft patelliform shell, marine gastropod molluscs in the clade Umbraculida, within the clade Euopisthobranchia.
3.
And although the name " limpet " is given on the basis of a limpet-like or " patelliform " shell, the several groups of snails that have a shell of this type are not at all closely related to one another.
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