Dino card No. 1477 of 2,027

Propanoplosaurus

Say it: pro-PAN-oh-ploh-SORE-us

Name means: “before Panoplosaurus”4

Ate: PlantsArmoured dinosEarly Cretaceous

Propanoplosaurus was a tiny armoured dinosaur that lived in what is now Maryland, USA. It was a baby nodosaur, covered in bony plates, and is one of the smallest dinosaur fossils ever found in eastern North America.1

Lived

120 to 113 million years ago4

Early Cretaceous

Fossils found in

Prince George's County, Maryland, USA2

Food

Plants4

Length

0.24 to 0.28 m3

hatchling; estimated total length

When did it live?

Triassic

Jurassic

Cretaceous

252 million years ago20114566, the asteroid

How big was it?

How long was it?

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cool stuff

Fun facts

Propanoplosaurus is known from a single fossil that is a natural mold and cast of a hatchling's skull and front body.1

It lived about 119 to 113 million years ago during the Early Cretaceous Period.4

This dinosaur is the first hatchling dinosaur ever reported from the eastern United States.1

The fossil was found in the Arundel Clay Member of the Patuxent Formation in Maryland.2

Propanoplosaurus belongs to the Nodosauridae family, a group of armoured dinosaurs without tail clubs.4

The fossil was collected in 1997 by Ray Stanford, who also named the dinosaur in 2011.2

AI-made picture of Propanoplosaurus — An AI-made picture of how Propanoplosaurus 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.

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Scientific name: Propanoplosaurus
Named by: Stanford et al. 20114
Group: Armoured dinos
Family / clade: Nodosauridae4
Classification: Ornithischia > Ankylosauria > Nodosauridae > Thyreophora4
Age of the rocks: 120 to 113 million years (Aptian)4
Rock formations: Patuxent4
Countries: USA4
Fossil records: 1 in the Paleobiology Database4
Discovery: Propanoplosaurus was named by Ray Stanford, David B. Weishampel and Valerie B. Deleon in 2011. The fossil was found in 1997 in Prince George's County, Maryland, USA.2 4
Still debated: Scientists are not sure how big Propanoplosaurus grew as an adult, because only a hatchling fossil has been found.1

Where the facts come from

Propanoplosaurus, nodosaur hatchling natural mold from Maryland (dml.reptilis.net)
Propanoplosaurus marylandicus Stanford et al., 2011 (si.edu)
Propanoplosaurus (en.wikipedia.org)
Propanoplosaurus 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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