Topic: Laccobius synonyms, Coleoptera, Hydrophilidae
The NBN has records of both Laccobius atrocephalus and L. ytenensis. The latter is a segregate of atrocephalus and as far as I know the true atrocephalus has never been recorded in UK. I don't have the latest Coleoptera checklist, but I'm sure I would have noticed a report in Latissimus if it had been found here. So I think the records should be merged under ytenensis.