AverostraAvetheropodaCoelurosauriaDinosauriaDromaeosauridaeEusaurischiaLate CretaceousManiraptoraManiraptoriformesNeotheropodaNorth AmericaOrionidesParavesPennaraptoraSaurischiaTetanuraeTheropodaTyrannoraptora

Richardoestesia isosceles 

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 or via the Support page.


Dinosaur: Richardoestesia isosceles 

Cretaceous: 86.3–66 Ma
Type: Theropod

Length*:1.5 m4.9 ft
Weight*:6 kg13 lb
ESR: 0.5 / 4 (estimated size reliability)
*The largest known specimen



Locations


Sources

Material: Many teeth.
References: Mortimer - Theropod database (online). Sankey, (2001). Late Campanian southern dinosaurs, Aguja Formation, Big Bend, Texas. Rubén Molina-Pérez & Asier Larramendi (2019) Dinosaur Facts and Figures: The Theropods and Other Dinosauriformes.

________________________

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


Pterosaur Database