AlvarezsauridaeAlvarezsauroideaAverostraAvetheropodaCoelurosauriaDinosauriaEusaurischiaLate CretaceousManiraptoraManiraptoriformesMononykiniNeotheropodaNorth AmericaOrionidesParvicursorinaeSaurischiaTetanuraeTheropodaTyrannoraptora

Albertonykus borealis

Dinosaur: Albertonykus borealis

Type: Theropod

Length*:1.2 m3.9 ft
Weight*:3 kg7 lb
ESR: 2.5 / 4 (estimated size reliability)
*The largest known specimen


Material: Left ulna and referred leg bones.
References: Longrich, Nicholas R.; Currie, Philip J. (2009). "Albertonykus borealis, a new alvarezsaur (Dinosauria: Theropoda) from the Early Maastrichtian of Alberta, Canada: Implications for the systematics and ecology of the Alvarezsauridae".


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