sentence1: Paralepetopsis tunnicliffae is a species of sea snail , a true limpet , a marine gastropod mollusk in the family Neolepetopsidae , one of the families of true limpets .
sentence2: Paralepetopsis tunnicliffae is a species of sea snail , a true limpet , a true gastropod mollusk in the family Neolepetopsidae , one of the families of the marine limpets .