Talk:Palaeoheterodonta

As I understand it, the order Trigoniidae is not extinct (see the Wikipedia article on same), with one surviving genus. Shouldn't the "extinct" dagger and the word "prehistoric" be removed from this article? Markjoseph125 (talk) 00:22, 25 June 2010 (UTC)

Mussels
Why do live mussels float in lake? 64.188.171.72 (talk) 18:15, 18 March 2022 (UTC)

Should this article exist?
Palaeoheterodonta is a subterclass, not a subclass as the article suggests. Also, other articles are saying they are in the "Subclass Palaeoheterodonta," when that's not a thing. This subterclass is in the subclass Autobranchia. I'm not sure how to change this to subterclass, or if subterclasses are even supported on Wikipedia. Naturalist LJ (talk) 01:48, 11 August 2023 (UTC)