[Stefanie Rick]

Looking at my quindecim, nagyi and pahuensis, which do not show this feature, and looking at my cf. rubrimontis Mimbon 2008 – which do – and looking further at some photos (e.g., in Peter Finke’s and Martin Hallmann’s book) – I dare to utter my impression (cum grano salis!) that it might be a feature restricted to the harveyi group (Formenkreis), in the broadest sense.