The primary candidates I know of are [SLH-DSA (AKA SPHINCS+)](https://conduition.io/cryptography/quantum-hbs/#SPINCS) or [SHRINCS](https://delvingbitcoin.org/t/shrincs-324-byte-stateful-post-quantum-signatures-with-static-backups/2158). You could technically use plain XMSS or even WOTS, but while more space-efficient these algorithms require statefulness.

conduition

Mind you, we still need a stopgap like hash-based signatures as a conservative fallback in case the assumptions of isogeny crypto are broken in the future.

could you name, let alone define, some salient examples?

bitcoin

Bitcoin Devs Should Be Learning Isogeny Cryptography

> Mind you, we still need a stopgap like hash-based signatures as a conservative fallback in case the assumptions of isogeny crypto are broken in the future.
 
could you name, let alone define, some salient examples?