‘Alien goldfish’ may have been unique mollusc, say scientists
Nicola Davis, The Guardian, September 22, 2022
[www.theguardian.com]

New clue found in 'alien goldfish' suggests it may have been a mollusk
by Bob Yirka , Phys.org
[phys.org]

The open access paper is:

Conway Morris, S. and Caron, J.B., 2022. A possible home for
a bizarre Carboniferous animal: is Typhloesus a pelagic gastropod?.
Biology Letters, 18(9), p.20220179.
[royalsocietypublishing.org]

Another paper:

Conway Morris, S., 1990. Typhloesus wellsi (Melton and Scott,
1973), a bizarre metazoan from the Carboniferous of Montana,
US A. Philosophical Transactions of the Royal Society of
London. B, Biological Sciences, 327(1242), pp.595-624.

Typhloesus wellsi
[en.wikipedia.org]

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)