The subspecies E. s. triglites of the Bergamo Alps and Monte Generoso is more strongly marked than the nominate subspecies E. s. styx.
Alps | Bergamo | Swiss Alps | French Alps | Dinaric Alps | Bavarian Alps | Australian Alps | Julian Alps | Southern Alps | Maritime Alps | Victorian Alps | Nine Black Alps | Napoleon Crossing the Alps | Gurktal Alps | Apuan Alps | Trinity Alps | Stubai Alps | Main chain of the Alps | Heidi, Girl of the Alps | Gailtal Alps | Central Eastern Alps | Northern Alps | Noric Alps | Ligurian Alps | Kitzbühel Alps | Flora of the Alps | Bonaparte Crossing the Alps | ''Bonaparte Crossing the Alps | Bergamo Alps | Arrochar Alps |