{"refrec":{"BRefID":232310,"RR":"<b>Ehrlich, H.; Rigby, J.K.; Botting, J.P.; Tsurkan, M.V.; Werner, C.; Schwille, P.; Petrasek, Z.; Pisera, A.; Simon, P.; Sivkov, V.N.; Vyalikh, D.V.; Molodtsov, S.L.; Kurek, D.; Kammer, M.; Hunoldt, S.; Born, R.; Stawski, D.; Steinhof, A.; Bazhenov, V.V.; Geisler, T.</b> (2013). Discovery of 505-million-year old chitin in the basal demosponge <i>Vauxia gracilenta</i>. <i>NPG Scientific Reports 3(3497)</i>: 6 pp. <a href=\"http://dx.doi.org/10.1038/srep03497\" target=\"_blank\">http://dx.doi.org/10.1038/srep03497</a>","BEntID":224022,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>NPG Scientific Reports 3(3497)</i>: 6 pp. <a href=\"http://dx.doi.org/10.1038/srep03497\" target=\"_blank\">http://dx.doi.org/10.1038/srep03497</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Ehrlich, H.; Rigby, J.K.; Botting, J.P.; Tsurkan, M.V.; Werner, C.; Schwille, P.; Petrasek, Z.; Pisera, A.; Simon, P.; Sivkov, V.N.; Vyalikh, D.V.; Molodtsov, S.L.; Kurek, D.; Kammer, M.; Hunoldt, S.; Born, R.; Stawski, D.; Steinhof, A.; Bazhenov, V.V.; Geisler, T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Ehrlich, H. <i>et al.</i>","Englishabstract":"Sponges are probably the earliest branching animals, and their fossil record dates back to the Precambrian. Identifying their skeletal structure and composition is thus a crucial step in improving our understanding of the early evolution of metazoans. Here, we present the discovery of 505–million-year-old chitin, found in exceptionally well preserved Vauxia gracilenta sponges from the Middle Cambrian Burgess Shale. Our new findings indicate that, given the right fossilization conditions, chitin is stable for much longer than previously suspected. 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