Figure 8
From: Double fossilization in eukaryotic microorganisms from Lower Cretaceous amber
![Figure 8](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1741-7007-7-9/MediaObjects/12915_2008_Article_217_Fig8_HTML.jpg)
Detail of a fossilized ciliate similar to the extant genus Paramecium. Note the numerous vesicles that probably contained H2S during early pyritization. Ma: pyritized macronucleus. Scale bar 20 μm.