[Taxacom] possible genus homonym nomenclatural question

[John Grehan]

Dear colleagues,

A friend of mine asked about why the genus name Clymna Hutton 1883 for a
group of snails is not a homonym a butterfly genus of the same name
under Calymma Hübner, 1823 (
https://www.nhm.ac.uk/our-science/data/butmoth/search/GenusDetails.dsml?NUMBER=4898.0
)

If it is a homonym then the synonymy of the snail genus Flammocharopa
under Calymna Hutton, 1883 would presumably be incorrect (see
https://www.molluscabase.org/aphia.php?p=taxdetails&id=820085 )

Perhaps I have missed something obvious, but I would be grateful for
insight from any on this list well acquainted with such issues. And please,
for those of you inclined to respond with unkind remarks about my knowledge
or understanding of nomenclature, keep them to yourselves. I am not
interested. Hopefully someone will be able to provide
clarification/corroboration of my current inference.

Thank you,

John Grehan