A temporary solution might be to add a “holding bin” observation field that represents a grouping or informal taxon that is more precise than the best ID, but not a formal taxon itself. This is a pretty common workaround for some of the less-studied arthropods that don’t have formal species complexes curated.
edit: i’m also going to put the words “bucket” and “annotation” in here so the next time I can’t think of what holding bins are called, it doesn’t take ten minutes to search again