Sulcolithos variabilis igen. et isp. nov.: grooves on firm and hard bedding surfaces

作者: Dirk Knaust

DOI: 10.1007/S12542-019-00464-Z

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摘要: The trace fossil Sulcolithos variabilis igen. et isp. nov. is described from the Middle Triassic (Ladinian) Muschelkalk Group of Germany. groove-like structures occur on surface limestone beds that provided firm to hard substrate burrowing and/or boring organisms. grooves have an elongate, straight or curved course and can be compound with subsurface burrow systems Balanoglossites. Similar fossils been reported Late Ediacaran Holocene deposits, seem prevalent in Ordovician, Jurassic time. Based indirect evidence (e.g. morphology, interrelationship Balanoglossites, property), S. attributed combined activity polychaetes. This interpretation supported by direct evidence, such as occurrence exceptionally preserved polychaete remains traces, both material Germany Ordovician specimens Anticosti Island, Canada. However, morphologically similar traces soft also produced other organisms bivalves) represent behavioural convergence.

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