Talk:Tylodina perversa

'Protein not calcium'
The article includes the passage 'This opisthobranch has a limpet-like shell which is composed primarily of protein, not calcium carbonate' but the only source for the article does not state this. Can we get a source added for that? --WhoIs 127.0.0.1 ping/loopback 12:09, 22 September 2022 (UTC)