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Abstract
Over one hundred years of palaeontological research in northwestern Argentina has provided extensive knowledge of Andean lower Palaeozoic fossil assemblages, with trilobites, graptolites, brachiopods and echinoderms being among the most prominent groups. This record is enriched by the recent discovery of soft-bodied worms in Cambrian outcrops of northwestern Argentina. Palaeoscolex sp. cf. P. ratcliffei from the Furongian Lampazar Formation in Jujuy is described, considerably expanding the biogeographical range of this genus and filling the distributional gap, between the well-known early–middle Cambrian occurrences of Palaeoscolex and those of its Ordovician species.
Acknowledgements
DCGB thanks the Spanish Ministry of Science and Education for ‘Juan de la Cierva’ and ‘Ramón y Cajal’ postdoctoral contracts with the Consejo Superior de Investigaciones Científicas (Spanish Research Council), Spain. Fieldwork was carried out with the financial support of projects 8734-10 NGS and CIUNT 26/G 401. E. Gómez-Hasselrot is also thanked for the assistance with line drawings. M.F. Tortello and S. Esteban provided helpful discussions and field assistance. We are grateful to J.R. Paterson (University of New England, Australia) for comments that improved an earlier version of this manuscript, and, especially, to the comments and suggestions made by two anonymous referees and S. McLoughlin as Editor-in-Chief.