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beaked plant-eater
Gonkoken
Say it like this: “gon-KO-ken”
Gonkoken nanoi
Gonkoken ate plants and walked on two or four legs. It lived in the Late Cretaceous. Bones have been found in Chile.
- When
- Late Cretaceous (Maastrichtian) · roughly 72.2 to 66 million years ago
- Named in
- 2023 · Alarcón-Muñoz, J.; Vargas, A. O.; Püschel, H. P.; Soto-Acuña, S.; Manríquez, L.; Leppe, M.; Kaluza, J.; Milla, V.; Gutstein, C. S.; Palma-Liberona, J.; Stinnesbeck, W.; Frey, E.; Pino, J. P.; Bajor, D.; Núñez, E.; Ortiz, H.; Rubilar-Rogers, D.; Cruzado-Caballero, P.
- Hip height
- 1.3 m · 4 ft
- Length
- 4 m · 13 ft
- Weight
- 400 kg · 882 lb
- Found in
- Chile · Dorotea
- Food and walking
- Herbivore · Two or four legs
- Kind
- beaked plant-eater · Ornithopod
- Family branch
- Hadrosauromorpha
The story in short
The genus Gonkoken dates to 2023, the year J. Alarcón-Muñoz and colleagues described it.
Fossils referred to Gonkoken date to the Late Cretaceous (Maastrichtian), roughly 72.2 to 66 million years ago. Finds come from Chile, including the Dorotea Formation. It was a herbivore and could move on two or four legs.
Published estimates put Gonkoken at a length near 4 m, hips about 1.3 m high, and a body mass around 400 kg.
On the family tree it sits in Hadrosauromorpha, among the ornithopod dinosaurs.
Close relatives
Bactrosaurus
Bactrosaurus johnsoni
Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago
Claosaurus
Claosaurus agilis
Late Cretaceous (Coniacian · Santonian) · roughly 89.8 to 83.6 million years ago
Eolambia
Eolambia caroljonesa
Late Cretaceous (Cenomanian) · roughly 100.5 to 93.9 million years ago