2012/12/01 292. zenbakia

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• Paleontologia
• Arkeologia

Navarre discovers a fossil nest 18 million years ago

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To the left, square, remains of the nest. And outside the picture, at the left end of the image, fossil egg preserved almost entirely. To the right, the nest and shells nearby. Ed. © PloS ONE

A nest of waterfowl has been found in Navarre in the Bardenas. The eggs belong to a precursor species of flamingos, one of which has been preserved almost entirely for 18 million years. According to the researchers, the nest is the oldest fossil in the world, since although in the paleontological register dinosaur eggs and other reptiles are known, they are not considered nests, since they have no laying structure.

The study of fossils has been carried out by geologists from the University of the Basque Country and the Spanish Institute of Geology and Mines, and by American and Brazilian paleontologists, who have released the result in the journal PLoS ONE. They have considered it an important discovery, since there are few parts of the shells, not even a few eggs. The characteristics of the shells, the study of the rock that houses the nest and the presence of pieces of bone allow to affirm that it is the nest of the anti-rabies species of the flamingos or current batons. This species lived in the current swamps of the Bardenas (not very deep and with a climate more temperate than the current one).

The fossil was discovered in late 2004 by fontellastarra Julio Salillas while repairing the damage caused by a storm with an excavator. In the bardenas, in addition to fossils of various types of vertebrates, fossilized shells of bird eggs, crocodiles and turtles have been found.