Irregulares
Probably paraphylletic or polyphylletic group of archaeocyathids with irregular shape of the skeleton.
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![[ENG]](img/vlajka-cr.gif)
Česky 
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]
Irregulares
Probably paraphylletic or polyphylletic group of archaeocyathids with irregular shape of the skeleton.
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