I found this fungus on Corsica (France). Can you please help me to identify it?
Based on the dark lamellae and the ring around the foot, I would bet on something in the Agaricus genus. The French Wikipedia gives quite some details about common species in this genus: https://fr.wikipedia.org/wiki/Agaric
Try looking up Chlorophyllum brunneum or commonly called a shaggy parasol. http://www.mykoweb.com/CAF/species/Chlorophyllum_brunneum.html Hope this helps.