Fig. 4: Structural properties of damaged and long setae.
From: Structural evidence for extracellular silica formation by diatoms

Slices in the reconstructed volumes of: a A damaged short seta (inset shows lower magnification). Blue arrowheads point to fibrous material that is aligned with the disrupted silica rods; b, c Long setae at different stages of cytoplasm degradation. Green asterisks indicate fragmented cytoplasm and red arrowheads indicate irregular sheet-like debris.