Abstract
During investigations in the Rhenish Schiefergebirge, West Germany, concerning the Devonian biostratigraphy of forereef limestones in the Brilon area (Figure 1) several diplodont teeth of fossil sharks were discovered by chance. Remains of xenacanthid teeth from marine Givetian beds are rare. They have been described by Hotton (1952) of probable Givetian/Frasnian age from North America, by Gross (1973) from Middle Devonian Hunsrück Shales, and by Young (1982) from Middle/Upper Devonian strata of Australia and Antarctica.
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