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Half-a-billion-year-old spiny slug-like fossil reveals the origins of #molluscs
Shishania aculeata reveals that the most primitive molluscs were flat, shell-less creatures covered in a protective spiny armour made from chitin bristles.
News · Half-a-billion-year-old spiny slug reveals the origins of molluscsA team of researchers have made an astonishing discovery of a new species of mollusc that lived 500 million years ago. The new fossil, called Shishania aculeata*, reveals that the most primitive molluscs were flat,
I do take issue with the journalist's description of the mollusc as a slug though, many people think snails evolved from slugs but it was actually the other way round, slugs are snails that lost their shells. in fact semi slugs have only partially lost them https://en.wikipedia.org/wiki/Semi-slug
en.wikipedia.orgSemi-slug - Wikipedia