Forum Flora Germanica

at some point these
http://agrozoo.net/gallery/Pseudoclitocybe-cyathiformis
looks like these
https://www.google.com/search?q=%22Arrh ... 4gLjkDwOaM


any opinion ?

Your pictures show Pseudoclitocybe, this is correct.
In comparison with Arrhenia species I don't see many similarities. Arrhenia species are quite small, fragile fungi that are associated with mosses and algae. They often have decurrent, widely spaced gills, which are sometimes connected by veins or reduced to wrinkles. Sometimes the cap is even slightly translucent.