I received this question from a colleague and would appreciate a determination. John Brown treated 'Olethreutes' betulana (Tortricidae) as nomen nudum in his 2005 checklist Once a taxon been treated as nomen nudum can you go back to a previous treatment as a revised status ? such as Powell 1983 'Olethreutes' betulana Heinrich or do you have to go forward from the nomen nudum treatment with a replacement name? John Grehan -- https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhepialidsoftheworld.com.au%2F&data=05%7C02%7Ctaxacom%40lists.ku.edu%7Cd040485c38e5482cc30608ddb393245d%7C3c176536afe643f5b96636feabbe3c1a%7C0%7C0%7C638864166740288182%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=7rYsuFaz5z3waVCJ1wLHQ6AcmaojYZJw73vmIXgL63I%3D&reserved=0 (use the 'visit archived web site' link, then the 'Ghost Moth Research page' link.