Sirindhorna
Sirindhorna was a plant-eating dinosaur that lived in what is now Thailand about 120 million years ago. It had a beak and lots of teeth for chewing tough plants. It is one of the best skulls ever found from a dinosaur like this in Southeast Asia.12
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standing height
How heavy was it?
as long as 6 dogs nose to tail🍌as long as 33 bananas end to end🍉as heavy as 200 watermelons🧸as heavy as 53 kindergarten kids🎒as heavy as 31 school kids🐻❄️as heavy as 2 polar bears🏃could run 100 metres in 11 seconds (the fastest human needs 9.6)How big was Sirindhorna compared to YOU?
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Fun facts
Sirindhorna is known from a nearly complete skull and lower jaws, which is very rare for dinosaurs from Southeast Asia.2
It had a long ridge on top of its skull called a sagittal crest, which helped anchor strong jaw muscles.2
Its teeth had a main ridge and a secondary ridge, which helped grind plant material.2
The fossils were found by farmers digging a reservoir, and then scientists studied the site.1
Sirindhorna lived in a semi-arid environment with meandering rivers, about 120 million years ago.2
It is one of the most primitive members of the group Hadrosauroidea, which includes the duck-billed dinosaurs.2
Most asked questions about Sirindhorna
?What did Sirindhorna eat?
It was a plant-eater. Its teeth had a main ridge and a secondary ridge to help grind tough plants.14
?How big was Sirindhorna?
Scientists don't know its exact size yet, because only skull and jaw bones have been found. It was a medium-sized ornithopod dinosaur.14
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For dino experts
- Scientific name
- Sirindhorna
- Named by
- Shibata et al. 20155
- Group
- Beaked plant-eaters
- Family / clade
- Hadrosauroidea5
- Classification
- Ornithischia > Ornithopoda > Iguanodontia5
- Age of the rocks
- 121 to 113 million years (Aptian)5
- Rock formations
- Khok Kruat5
- Countries
- Thailand5
- Fossil records
- 1 in the Paleobiology Database5
- Discovery
- Sirindhorna was named in 2015 by a team of Japanese, Thai, and Chinese scientists. The fossils were found at Ban Saphan Hin in Thailand, and the name honors Princess Maha Chakri Sirindhorn.12
- Still debated
- Scientists are not sure about the exact age of the rocks where Sirindhorna was found, but they think it lived during the Aptian stage, about 120 million years ago.12
Where the facts come from
- Sirindhorna (en.wikipedia.org)
- A New Basal Hadrosauroid Dinosaur from the Lower Cretaceous Khok Kruat Formation in Nakhon Ratchasima Province, Northeastern Thailand (journals.plos.org)
- Meet ‘Sirindhorna Khoratensis,’ New Dinosaur Discovered in Korat (khaosodenglish.com)
- A New Basal Hadrosauroid Dinosaur from the Lower Cretaceous Khok Kruat Formation in Nakhon Ratchasima Province, Northeastern Thailand | PLOS One (journals.plos.org)
- Sirindhorna in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.
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