Indeterminate trackway, singular amphibian footprints. For Sale
Indeterminate trackway, singular amphibian footprints.:
Unsure who the trackmaker was on the trackway. To the right is evidence of a five-digit pes and a four-digit manus. That is a very common configuration in the El Pueblo swampfacies. Tetrapods with a four-digit manus, and sometimes four-digit pes, were akin to the end Carboniferous and a holdover to the Artinskian early Permian. As tetrapods became more terrestrial and more adapted to clayey swamps, five digits became the more common digit configuration, perhaps for better traction in slippery shores. The El Pueblo swampfacies is more or less a carboniferous-Permian boundaryenvironmentand a showcase for differing numbers of digits, from two to five (H. Ortiz, 2017).