That largest detritivore coprolites, found in Medullosa stem and leaf-root peats, probably derive from giant millipedes and small arthropleurids. |
These tissues can theoretically be identified from very small samples, such as fragments in dinosaur coprolites. |
No organic detritus or sediment is present in the spaces between coprolites. |
Thus, although wood, bones, and shells are the most common fossils, under certain conditions soft tissues, tracks and trails, and even coprolites may be preserved as fossils. |
Parasites have also been found in human coprolites and medieval cesspits. |
New experimental evidence on the faeces of modern fish show that faeces must be buried in less than 24 hours if they are to be preserved as coprolites in the fossil record. |