No, we don't need anyone to say explicitly that the dubious genera don't exist; we just need a comprehensive listing of the genera that are present. At the moment, the only one of those post-dating the original description is WoRMS. Once it fixes its error, everything will be fine, but we can't lead the way. We can choose as editors to disregard WoRMS, which would involve removing the whole last paragraph. No-one has argued for that yet, but I could see it working. I'll give it a go.