A new earthworm trace fossil from palaeosols: aestivation chambers from the Late Pleistocene Sopas Formation of Uruguay

Verde, M., Ubilla, M., Jiménez, J. J., Genise, J. F. 2007. A new earthworm trace fossil from palaeosols: aestivation chambers from the Late Pleistocene Sopas Formation of Uruguay . Palaeogeography, Palaeoclimatology, Palaeoecology 243(3-4): 339-347.
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