Adolf "Dolf" Seilacher (24 February 1925 – 26 April 2014) was a German palaeontologist who worked in evolutionary and ecological palaeobiology for over 60 years. He is best known for his contributions to the study of trace fossils; constructional morphology and structuralism; biostratinomy, ''Lagerstätten'' and the Ediacaran biota.
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