Abstract
The stratigraphic value of trilobite burrows has recently been questioned because of a seemingly Ordovician form in the Lower Cambrian of Canada. Closer examination shows, however, that the Cambrian homeomorph (Cruziana pectinata n. sp.) has a significantly different scratch pattern. This raises the question whether the multiple scratches of the Ordovician Cruziana rugosa were also made by exopodites or by similarly shaped endopodites.
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Seilacher, A. How valid is Cruziana Stratigraphy?. Geol Rundsch 83, 752–758 (1994). https://doi.org/10.1007/BF00251073
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DOI: https://doi.org/10.1007/BF00251073