*1 – Gap (intervallum) *2 – Central cavity *3 – Internal wall *4 – Pore (all the walls and septa have pores, not all are represented) *5 – Septum *6 – External wall *7 – Rizoid
Virtual museum of the Czech Geological Survey, cgs.gov.cz, (C) Czech Geological Survey, 2011, v.1.01 [29.09.2025]