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      Cyrtoctenus wittebergensis sp. nov. (Chelicerata: Eurypterida), a large sweep-feeder from the Carboniferous of South Africa

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          Abstract

          Cyrtoctenus wittebergensissp. nov. is described from a unique holotype from the Witteberg Group of the Cape Supergroup. It is a giant hibbertopteroid eurypterid having combs and specialised movable spines of crytoctenid type (Størmer & Waterston 1968) on the more distal podomeres of the second to fourth prosomal appendages. The function of the combs and their associated movable spines is discussed and it is suggested that together they formed a unique adaptation of eurypterid structures to sweep filter-feeding, the combs forming the filters and the spines the cleaners. The digestive tract is remarkably preserved and shows a spiral valve, posterior to the stomach, which is interpreted as an adaptive feature in this large arthropod to increase the absorptive area of the gut.

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          Most cited references19

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          Crustal Evolution of Southern Africa

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            The late Palaeozoic to early Mesozoic evolution of southern South America: a plate tectonic interpretation

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              A New Eurypterid from the Ordovician of Montgomeryshire, Wales

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                Author and article information

                Journal
                applab
                Transactions of the Royal Society of Edinburgh: Earth Sciences
                Transactions of the Royal Society of Edinburgh: Earth Sciences
                Cambridge University Press (CUP)
                0263-5933
                1473-7116
                1985
                November 2011
                : 76
                : 2-3
                : 339-358
                Article
                10.1017/S0263593300010555
                2134b56d-9963-47f5-8045-8b555a6bc99d
                © 1985
                History

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