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The Lower Cambrian Emu Bay Shale contains in its lower part, exposed near White Point on the north coast of Kangaroo Island, an unusual assemblage of phyllocarid crustaceans (Isoxys communis sp. nov., Tuzoia australis sp. nov.) and annelid worms (Palaeoscolex antiquus sp. nov., Myoscolex ateles gen. et sp. nov., Vetustovermis planus gen. et sp. nov.), together with Estaingia and redlichiid trilobites. This appears to be a thanatocoenosis deposited in a reducing environment but preservation of the worms is largely due to diagenetic calcification of their soft tissues.
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Martin F. Glaessner (1979) studied this question.
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