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4cm. From the Bavarian "Bruchschollenland". Triassic upper Muschelkalk.
Posted September 8, 2016
Looks like a "Strong" group of individuals.
They colonized pretty large areas. I guess that's why they're called socialis. It was a recent gift from one of my Bavarian friends.
Posted September 9, 2016
My friend just informed me that there are also a couple of Bakevellia costata amongst the others. Those are the smaller fine-ribbed ones.