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horned dinosaur
Sasayamagnomus
Say it like this: “SAS-uh-YAH-muh-NO-mus”
Sasayamagnomus saegusai
Sasayamagnomus ate plants and walked on two legs. It lived in the Early Cretaceous. Bones have been found in Japan.
- When
- Early Cretaceous (Albian) · roughly 113.2 to 100.5 million years ago
- Named in
- 2024 · Tanaka, T.; Chiba, K.; Ikeda, T.; Ryan, M. J.
- Hip height
- Not established
- Length
- 0.8 m · 3 ft
- Weight
- Not established
- Found in
- Japan · Ohyamashimo
- Food and walking
- Herbivore · Two legs
- Kind
- horned dinosaur · Ceratopsian
- Family branch
- Neoceratopsia
The story in short
Sasayamagnomus was formally named in 2024 by T. Tanaka and colleagues. The name means “gnome from Sasayama.”
It lived in the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from Japan, including the Ohyamashimo Formation. It was a herbivore and walked on two legs.
Published estimates put Sasayamagnomus at a length near 0.8 m.
On the family tree it sits in Neoceratopsia, among the horned dinosaurs.
Close relatives
Aquilops
Aquilops americanus
Early Cretaceous (Albian) · roughly 113.2 to 100.5 million years ago
Archaeoceratops
Archaeoceratops oshimai
Early Cretaceous (Aptian · Albian) · roughly 121.4 to 100.5 million years ago
Asiaceratops
Asiaceratops salsopaludalis
Late Cretaceous (Cenomanian) · roughly 100.5 to 93.9 million years ago