Late Cambrian coprolites and fossilized eggs from Poland

The Upper Cambrian Słowińska Formation yielded minute three-dimensionally preserved, phosphatic microfossils. Based on shape and structure, two distinct types are identified. The first type comprises sinuously folded, coiled, or spiral string-shaped objects interpreted as coprolites produced by benthic worms. The second type of fossils comprises ellipsoidal to spherical forms with a non-ornamented but wrinkled surface. They are interpreted as collapsed and deformed eggs or embryos lacking the egg shell. We interpret this type as the first evidence of eggs in the so-called Orsten-type preservation, most likely belonging to phosphatocopid crustaceans. The findings are a significant contribution to our understanding of the faunal composition in the Late Cambrian Sea and demonstrates the potential for further research on the phosphatic microfossils from northern Poland (Baltica).

PUBLICATION: Olempska E., Błażejowski B., Waloszek D., Maas A. 2023. Phosphatic bromalites and microfossils from the Furongian (Cambrian) of northern Poland (Baltica) and palaeobiological implications. Palaeogeography, Palaeoclimatology, Palaeoecology, 610, 111350. doi:10.1016/j.palaeo.2022.111350