Hi,
I think your #3 isn't longimamma but decipiens, quite a variable species. I'd like to see flowers, but your #2 cold be one of the many forms of M. crinita. I don't recognise #1, and would question of it is a normal form. The very short radial spines and club shaped body ought to be make it easy to identify, but at the moment it beats me.
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Chris43, moderator