Carboniferous
Many insects have been found in the coalfields of Saarbrücken and Commentry, and within the hollow trunks of fossil trees in Nova Scotia. Some British coalfields have yielded good specimens: Archaeoptilus, from the Derbyshire coalfield, had a large wing with  preserved part, and some specimens (Brodia) still show traces of brilliant wing colors. Land snails (Archaeozonites, Dendropupa) have been found in the Nova Scotian tree trunks mentioned above.