- Trypanites
"Trypanites" is a narrow, cylindrical, unbranched boring which is one of the most common trace fossils in hard substrates such as rocks, carbonate
hardground s and shells (Bromley, 1972). It appears first in the LowerCambrian (James et al., 1977), was very prominent in theOrdovician Bioerosion Revolution (Wilson and Palmer, 2006), and is still commonly formed today. "Trypanites" is almost always found in calcareous substrates, most likely because the excavating organism used an acid or other chemical agent to dissolve thecalcium carbonate (Taylor and Wilson, 2003).References
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*External links
* [http://www.envs.emory.edu/faculty/MARTIN/ichnology/Trypanites.htm "Trypanites" images]
* [http://www.wooster.edu/geology/Bioerosion/Bioerosion.html Bioerosion Website] atThe College of Wooster
* [http://www.wooster.edu/geology/bioerosion/BioerosionBiblio.pdf Comprehensive bioerosion bibliography]
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