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Planicoxa

Say it: plan-ih-COX-uh

Name means: “flat hip”1

Ate: PlantsBeaked plant-eatersEarly Cretaceous

Planicoxa was a plant-eating dinosaur that walked on two legs and lived in what is now Utah, USA. It had a flat hip bone that gave it its name. This dinosaur was about as long as a car and weighed as much as a big bear.1 2

Lived

121 to 113 million years ago2

Early Cretaceous

Fossils found in

Poison Strip Sandstone Member of the Cedar Mountain Formation in Grand County, Utah, USA1 2

Food

Plants2

Length

4.5 m1

Weight

450 kg1

When did it live?

Triassic

Jurassic

Cretaceous

252 million years ago20114566, the asteroid

How big was it?

How long was it?

How heavy was it?

as heavy as 15 big dogs

as long as 4 dogs nose to tailas long as 25 bananas end to endas heavy as 90 watermelons

How big was Planicoxa compared to YOU?

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cool stuff

Fun facts

Planicoxa's name means 'flat hip' because its hip bone (ilium) had a flat, folded-over part that no other dinosaur had.1

The species name 'venenica' is Latin for 'poison', after the Poison Strip Sandstone where the fossils were found.1

Scientists found several partial skeletons of Planicoxa, including well-preserved hip bones, thigh bones, shin bones, and backbones.1

Planicoxa lived about 129 to 125 million years ago, during the Early Cretaceous period.1

A second species once thought to belong to Planicoxa was later moved to its own genus, Osmakasaurus.1

AI-made picture of Planicoxa — An AI-made picture of how Planicoxa 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 Planicoxa

?How big was Planicoxa?

Planicoxa reached about 4.5 metres (15 feet) long and weighed around 450 kilograms (990 pounds). That is about as long as a car and as heavy as a big bear.1

?What did Planicoxa eat?

Planicoxa was a plant-eating dinosaur. It was an ornithopod, a group of herbivorous dinosaurs that ate plants.1 2

?When did Planicoxa live?

Planicoxa lived during the Early Cretaceous period, about 129 to 125 million years ago.1

?Where was Planicoxa found?

Planicoxa fossils were discovered in the Poison Strip Sandstone Member of the Cedar Mountain Formation in Grand County, Utah, USA.1

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For dino experts

Scientific name: Planicoxa
Named by: DiCroce and Carpenter 20012
Group: Beaked plant-eaters
Family / clade: Iguanodontia2
Classification: Ornithischia > Ornithopoda > Iguanodontia2
Age of the rocks: 121 to 113 million years (Aptian)2
Rock formations: Cedar Mountain2
Countries: USA2
Fossil records: 1 in the Paleobiology Database2
Discovery: Planicoxa was named in 2001 by Tony DiCroce and Kenneth Carpenter. The fossils were found in the Poison Strip Sandstone of the Cedar Mountain Formation in Utah, USA.1 2
Still debated: Scientists are still debating exactly how Planicoxa is related to other iguanodontian dinosaurs.2

Where the facts come from

Planicoxa (en.wikipedia.org)
Planicoxa 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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