Add Subterclass to CTTAXON_TERM #1815

Value
Subterclass

Definition
Subterclass comes after Infraclass and before Superorder.

World Register of Marine Species uses Subterclass for Tectipleura: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1057250

When I clone a taxa with that includes Tectipleura, I get errors.

I can change Euthyneura to Infraclass, but I have to delete Tectipleura because I can't upload it as a new taxon.

Priority
I would like to have this resolved by date: I've been dealing with it for months, but I have more and more incomplete taxa and if we're going to upload WoRMS we'll want to have the same classification scheme.