NEW VERTEBRATE TRACKS FROM THE NEOGENE RÍO NEGRO FORMATION (RÍO NEGRO PROVINCE, ARGENTINA)

Authors

  • Paolo Citton Instituto de Investigación en Paleobiología y Geología (IIPG, CONICET-Universidad Nacional de Río Negro), Avenida Roca 1242, General Roca, 8332, Río Negro, Argentina https://orcid.org/0000-0002-6503-5541
  • Martina Caratelli Instituto de Investigación en Paleobiología y Geología (IIPG, CONICET-Universidad Nacional de Río Negro), Avenida Roca 1242, General Roca, 8332, Río Negro, Argentina https://orcid.org/0000-0002-1032-9462
  • Carlos Cónsole-Gonella Instituto Superior de Correlación Geológica (INSUGEO, CONICET-Universidad Nacional de Tucumán), Avenida Presidente Perón s/n, Yerba Buena, 4107, Tucumán, Argentina https://orcid.org/0000-0002-4457-1660
  • Silvina de Valais Instituto de Investigación en Paleobiología y Geología (IIPG, CONICET-Universidad Nacional de Río Negro), Avenida Roca 1242, General Roca, 8332, Río Negro, Argentina https://orcid.org/0000-0002-2661-8015
  • Romina M. Montes Universidad Nacional de Río Negro, Sede Alto Valle y Valle Medio, Isidro Lobo 516, 8332 General Roca, Río Negro, Argentina
  • Fernando M. Archuby Centro de Estudios Integrales de La Dinámica Exógena (CEIDE, Universidad Nacional de La Plata), Diagonal 113 Nro 469, 1900, La Plata, Buenos Aires, Argentina https://orcid.org/0000-0002-0450-3364
  • Ignacio Díaz-Martínez Instituto de Investigación en Paleobiología y Geología (IIPG, CONICET-Universidad Nacional de Río Negro), Avenida Roca 1242, General Roca, 8332, Río Negro, Argentina https://orcid.org/0000-0001-5301-8384

DOI:

https://doi.org/10.5710/AMGH.05.11.2022.3496

Keywords:

Vertebrate tracks, Río Negro Formation, Neogene, Atlantic shoreline, Gruipeda, Porcellusignum, Mammals, Birds

Abstract

New tetrapod footprints were recently found close to Pozo Salado, on the Atlantic shoreline west of Punta Mejillón area (Río Negro Province, Argentina). Footprints are preserved on the top-surface of a fine-grained sandstone included in a stratigraphic section belonging to the Neogene Río Negro Formation. The tracksite displays abundant footprints but a relatively low ichno-diversity. Both footprint morphologies and extra-morphologies suggest that the surface and subsurface remained compliant to producers of different size-classes during a relatively long time of exposure and trampling. Footprints sufficiently detailed to allow an ichnotaxonomic allocation were classified as Gruipeda maxima, Gruipeda cf. maxima, cf. Porcellusignum isp., and indeterminate Eutardigrada tracks, related to gruiform/ciconiiform birds, hydrochoerid rodents and ground sloths, respectively. The new finding, more than 100 km SW of the typical track-bearing localities of the Atlantic coast, enriches the vertebrate track record from the Río Negro Formation and adds a newly reported ichnospecies.

Additional Files

Published

2022-12-16

Issue

Vol. 59 No. 6 (2022)

Section

Articles

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How to Cite

NEW VERTEBRATE TRACKS FROM THE NEOGENE RÍO NEGRO FORMATION (RÍO NEGRO PROVINCE, ARGENTINA). (2022). Ameghiniana, 59(6), 407-417. https://doi.org/10.5710/AMGH.05.11.2022.3496