Sasayamagnomus
Sasayamagnomus was a tiny, plant-eating dinosaur with a beak, like a mini horned dinosaur. It lived in what is now Japan during the Early Cretaceous, about 112 million years ago. This little dinosaur was only as long as a cat!14
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Fun facts
Sasayamagnomus was named in 2024, making it one of the newest dinosaurs discovered.1
The name Sasayamagnomus means 'gnome from Sasayama' because the fossils were found in the Sasayama Basin in Japan.1
Scientists found bones from at least two individuals mixed together, including two right nasal bones.1
This dinosaur is a neoceratopsian, a group of early horned dinosaurs that did not have big horns yet.1
Sasayamagnomus lived alongside other dinosaurs like the long-necked Tambatitanis and the troodontid Hypnovenator.1
The holotype specimen is only about 80 centimetres (2.6 feet) long, but it was not fully grown.1
Most asked questions about Sasayamagnomus
?How big was Sasayamagnomus?
About 80 centimetres (2.6 feet) long, but that was a young one. Adults were probably a bit bigger.1
?Did Sasayamagnomus have horns?
No. It was an early horned dinosaur, so it did not have big horns yet, only a small frill.3
?What did Sasayamagnomus eat?
It was a plant-eater. It had a beak for snipping plants.1
?Where was Sasayamagnomus found?
In Hyōgo Prefecture, Japan, at the Miyada microvertebrate site in Tamba-Sasayama city.1
?When did Sasayamagnomus live?
It lived during the Early Cretaceous, about 112 million years ago.1
?Is Sasayamagnomus a dinosaur?
Yes, it is a neoceratopsian dinosaur, a type of horned dinosaur.1
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For dino experts
- Scientific name
- Sasayamagnomus
- Named by
- Tanaka et al. 20244
- Group
- Horned dinos
- Family / clade
- Neoceratopsia4
- Classification
- Ornithischia > Ceratopsia4
- Age of the rocks
- 113 to 110 million years (Albian)4
- Rock formations
- Ohyamashimo4
- Countries
- Japan4
- Fossil records
- 1 in the Paleobiology Database4
- Discovery
- Sasayamagnomus was discovered at the Miyada microvertebrate site in Japan and formally named by Tanaka, Chiba, Ikeda and Ryan in 2024. The species name saegusai honors Dr. Haruo Saegusa, a leader in dinosaur excavation in the Tamba area.1
- Still debated
- Because the only known skeleton is a juvenile, scientists are not sure how big a full-grown Sasayamagnomus could get.1
Where the facts come from
- Sasayamagnomus (en.wikipedia.org)
- A tiny relative of the Triceratops: International team discovers a new horned dinosaur (phys.org)
- 兵庫県で発見の角竜類の化石 新属新種と確認 | ニュース | 岡山理科大学生物地球学部恐竜学科 (dino.ous.ac.jp)
- Sasayamagnomus in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.
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