We report the first avian bone collected in the Late Pleistocene Dolores Formation, which crops out near Colonia city. The fossil was identified as a femur belonging to an Anatidae that represents the second Anseriform from Uruguay. Two bioerosive traces found on this fossil consist of borings of different sizes and depths were probably occasioned by larvae insect. These traces might have been produced during a brief period of subaerial exposure, in a continental paleoenvironment with dry episodes.

中文翻译：

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来自乌拉圭的更新世Anatid骨骼中的生物侵蚀痕迹

我们报告了在晚更新世的多洛雷斯形成中收集的第一只禽类骨头，该骨头在科洛尼亚市附近种植。该化石被鉴定为属于an科的股骨，代表了来自乌拉圭的第二个s兽。在这种化石上发现的两种生物侵蚀痕迹可能是幼虫引起的，大小不一，深度不同。这些痕迹可能是在大陆下古环境和干燥时期的短期暴露于地下空气中产生的。