Allen Formation
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The Allen Formation is a geological formation in Argentina whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation. Indetermin
Outcrop of the Allen and Anacleto Formations at Auca Mahuida
Life restoration of some dinosaurs discovered in the Allen Formation
Rocasaurus
Pellegrinisaurus
Bonapartenykus
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Bonapartenykus is an extinct genus of alvarezsauroid dinosaur that lived during the Late Cretaceous of what is now the Allen Formation of the Río Negro Province, Argentina. The genus contains a single
Allen Formation
…skeleton including parts of the skull, lower jaw, a few neck and torso vertebrae, some ribs, a humerus, and assorted bones from both legs A dromaeosaurid Bonapartenykus B. ultimus Upper A holotype consists of a mid-dorsal vertebra, both scapulocoracoids, left tibia and femur, left pubis articulated with the pubic…
Reconstructed skeleton of the closely related Patagonykus
Patagonykuspuertai
Confuciusornis plumage pattern