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Nannopterygius

Say it: nan-op-ter-IJ-ee-us
Name means: “small wing or flipper”1
Ate: MeatIchthyosaursLate Jurassic to Early CretaceousNot technically a dinosaur

Nannopterygius was a small, fast-swimming marine reptile that lived in the Jurassic seas. It had tiny flippers and a long, streamlined body like a torpedo. It used its big eyes to spot fish and squid in the dim water.1

Fun fact: this sea reptile swam while dinosaurs walked on land. Everyone calls them dinos, but they were a different branch of reptiles.
Lived
155 to 143 million years ago2
Late Jurassic to Early Cretaceous
Fossils found in
England, Kazakhstan, Russia, and Norway1
Length
up to 3.5 m (11 ft)1
Top speed
about 48 km/h (30 mph)
Swimming, estimate
What did Nannopterygius eat?
It probably ate fish and squid. It was likely an ambush predator that quickly plunged into shoals of fish in shallow seas.

When did it live?

Triassic
Jurassic
Cretaceous
252 million years ago20114566, the asteroid

How big was it?

How long was it?

Nannopterygius about 3.5 m long (11 ft)A bicycle about 1.8 m (5.9 ft)A car about 4.5 m (15 ft)An elephant, the biggest land animal today about 6.5 m (21 ft)
as long as 4 dogs nose to tailas long as 19 bananas end to endcould swim the length of a big swimming pool (50 m) in 3.8 seconds

How big was Nannopterygius compared to YOU?

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How fast was it?

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Fun facts

1

Nannopterygius had very small flippers, only 25 to 30 centimeters (10 to 12 inches) long for the front ones and 10 to 15 centimeters (4 to 6 inches) for the back ones.1

2

Its name means 'small wing' in Greek, because its flippers were so tiny compared to other ichthyosaurs.1

3

It had a long tail that made up about 1 meter (3.3 feet) of its total length, with a deeply forked fin.1

4

Nannopterygius had at least 60 disc-shaped vertebrae, making its body flexible and agile.1

5

Its eyes were large and had a bony ring inside the socket, which helped it see in dark water.1

6

Because its flippers were so small, Nannopterygius was not good at long-distance swimming but could sprint quickly over short distances.1

7

The first fossil of Nannopterygius was found in Kimmeridge Bay, Dorset, England, and was named Ichthyosaurus enthekiodon in 1871.1

AI-madeAI-made picture of Nannopterygius
An AI-made picture of how Nannopterygius 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 Nannopterygius

?How big was Nannopterygius?

It was small for an ichthyosaur, measuring up to 3.5 metres (11 feet) long.1

?What did Nannopterygius eat?

It probably ate fish and squid. It was likely an ambush predator that quickly plunged into shoals of fish in shallow seas.1

?Is Nannopterygius a dinosaur?

No, it is not a dinosaur. It is an extinct marine reptile called an ichthyosaur.1

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For dino experts

Scientific name
Nannopterygius
Named by
Huene 19232
Group
Ichthyosaurs
Family / clade
Ophthalmosauridae2
Classification
Ichthyosauria > Ichthyosauromorpha2
Age of the rocks
155 to 143 million years (Kimmeridgian / Tithonian)2
Rock formations
Kimmeridge Clay2
Countries
Russia, United Kingdom2
Fossil records
3 in the Paleobiology Database2
Discovery
The first Nannopterygius fossil was found in Kimmeridge Bay, Dorset, England, and described by J. W. Hulke in 1871 as Ichthyosaurus enthekiodon. In 1922, Friedrich von Huene gave it its own genus name Nannopterygius because of its small flippers.1

Where the facts come from

  1. Nannopterygius (en.wikipedia.org)
  2. Nannopterygius in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.

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More from the same group: Ichthyosaurs

Also from the same time: Late Jurassic

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