Cheiichnus gothicus igen. et isp. n., a new Bergaueria-like arthropod trace fossil from the Lower Cambrian of Västergötland, Sweden

A new arthropod-type trace fossil from the Lower Cambrian Mickwitzia sandstone of Västergötland, Sweden, shows an enigmatic rotational behaviour in an arthropod, perhaps an olenellid trilobite. Cheiichnus gothicus igen. et isp. n., is hemispherical to plug-shaped with two types of scratch traces. It shares characters with both Rusophycus and Bergaueria. Indeed, poorly preserved specimens of Cheiichnus could be identified as the actinian-type trace fossil Bergaueria.