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![](./images/clear.gif) 1.- Large striated burrows from fluvial deposits of the Neogene Vinchina Formation, La Rioja, Argentina; a crab origin suggested by neoichnology and sedimentology
Elsevier; Amsterdam; NLD; Netherlands, 2010
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![](./images/clear.gif) 2.- Rhizolith balls from the Lower Cretaceous of Patagonia; just roots or the oldest evidence of insect agriculture?
Elsevier; Amsterdam; NLD; Netherlands, 2010
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