Dino card No. 1614 of 2,027

Secernosaurus

Say it: see-SER-noh-SORE-us

Name means: “separated lizard”1

Ate: PlantsDuck-billsLate Cretaceous

Secernosaurus was a duck-billed dinosaur that lived in South America. It was one of the first hadrosaurs ever found there, and it munched on plants with its wide, flat beak.1

Lived

72 to 66 million years ago4

Late Cretaceous

Fossils found in

Argentina (Chubut province)1 2

Food

Plants1 2

Length

3 m1

When did it live?

Triassic

Jurassic

Cretaceous

252 million years ago20114566, the asteroid

How big was it?

as long as 1.5 bicycles in a rowas long as 17 bananas end to end

How big was Secernosaurus compared to YOU?

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cool stuff

Fun facts

Secernosaurus was the first hadrosaurid dinosaur ever discovered in South America.1

It lived during the Late Cretaceous period, about 71 to 66 million years ago.1

Its fossils were found near Lago Colhue Huapi in Argentina.4

Scientists think Secernosaurus may have lived in groups, like many other duck-billed dinosaurs.2

AI-made picture of Secernosaurus — An AI-made picture of how Secernosaurus might have looked, made by a computer from what scientists know. It is a guess: the real animal may have looked different, and nobody knows its true colours.

you asked

Most asked questions about Secernosaurus

?How big was Secernosaurus?

About 4 to 5 metres (13 to 16 feet) long. It was a small hadrosaurid.3

?What did Secernosaurus eat?

It was a herbivore, eating plants with its wide, flat beak.1

?Where did Secernosaurus live?

It lived in what is now Argentina, in a region called Patagonia, during the Late Cretaceous.3

?Is Secernosaurus a dinosaur?

Yes, it is a dinosaur. It belongs to the group Hadrosauridae, the duck-billed dinosaurs.1

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For dino experts

Scientific name: Secernosaurus
Named by: Brett-Surman 19794
Group: Duck-bills
Family / clade: Hadrosauridae4
Classification: Ornithischia > Ornithopoda > Iguanodontia > Hadrosauridae4
Age of the rocks: 72 to 66 million years (Maastrichtian)4
Rock formations: Lago Colhué Huapi4
Countries: Argentina4
Fossil records: 1 in the Paleobiology Database4
Discovery: Secernosaurus was named by paleontologist Brett-Surman in 1979, based on a partial skeleton found in Argentina.1 4
Still debated: Scientists are not sure exactly how Secernosaurus is related to other hadrosaurs. Some think it belongs to the group Kritosaurini, but others disagree.2

Where the facts come from

Secernosaurus | Natural History Museum (nhm.ac.uk)
PBDB Taxon (paleobiodb.org)
Secernosaurus (en.wikipedia.org)
Secernosaurus in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.

Every fact on this page has a number that points to its source. If we got something wrong, sorry, we are dino fans, not a science journal. Tell us at [email protected] and we will fix it.

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