AlvarezsauridaeAlvarezsauroideaAverostraAvetheropodaCoelurosauriaDinosauriaEusaurischiaLate CretaceousManiraptoraManiraptoriformesNeotheropodaOrionidesPatagonykinaeSaurischiaSouth AmericaTetanuraeTheropodaTyrannoraptora

Bonapartenykus ultimus

Every month, 100,000 readers use the Dinosaur Database, but we receive no support from you. Developing and updating the database requires a lot of work. Therefore, as of September 1, 2025, the database will be closed. If you want it to remain open and be updated, please support us via the "Buy us a coffee" button available on every page.


Dinosaur: Bonapartenykus ultimus

Cretaceous: 83.6–66 Ma
Type: Theropod

Length*:2.9 m9.5 ft
Weight*:34 kg75 lb
ESR: 2.5 / 4 (estimated size reliability)
*The largest known specimen



Locations


Sources

Material: Partial skeleton without skull, referred other fragments.
References: Federico L. Agnolin; Jaime E. Powell; Fernando E. Novas & Martin Kundrát (June 2012). "New alvarezsaurid (Dinosauria, Theropoda) from uppermost Cretaceous of north-western Patagonia with associated eggs".

________________________

If you are interested in Excel Professional version of Dinosaur or Pterosaur Database, write to us


Pterosaur Database