Fossil discoveries: worm borings

Sometimes, when looking for fossils, one stumbles across somthing never seen before, which reveals an extra little detail about the grand tapestry of ancient life. In this case, it's a Silurian (late Ludlow) nautiloid shell... and something unexpected that happened to it! Presenter: Joe Botting References Adrianov, A.V., Malakhov, V.V. and Maiorova, A.S., 2006. Development of the tentacular apparatus in sipunculans (Sipuncula): I. Thysanocardia nigra (Ikeda, 1904) and Themiste pyroides (Chamberlin, 1920). Journal of Morphology, 267(5), pp.569-583. Huang, D.Y., Chen, J.Y., Vannier, J. and Saiz Salinas, J.I., 2004. Early Cambrian sipunculan worms from southwest China. Proceedings of the Royal Society of London. Series B: Biological Sciences, 271(1549), pp.1671-1676. Rice, M.E., 1993. Sipuncula. Struck, T.H., Schult, N., Kusen, T., Hickman, E., Bleidorn, C., McHugh, D. and Halanych, K.M., 2007. Annelid phylogeny and the status of Sipuncula and Echiura. BMC evolutionary Biology, 7(1), p.57. Villas, E., Mayoral, E., Santos, A., Colmenar, J. and Gutiérrez-Marco, J.C., 2021. Annelid borings on brachiopod shells from the Upper Ordovician of Peru. A long-distance co-migration of biotic partners. Frontiers in Ecology and Evolution, 9, p.766290. Vinn, O., 2004, December. The earliest known Trypanites borings in the shells of articulate brachiopods from the Arenig (Ordovician) of Baltica. In Proceedings of the Estonian Academy of Sciences, Geology (Vol. 53, No. 4, pp. 257-266). Estonian Academy Publishers. Vinn, O. and Toom, U., 2016. Borings in phosphatized Cambrian siltstone pebbles, Estonia (Baltica). Geological Magazine, 153(4), pp.635-642.