Nanosaurus Facts
Pronunciation: NAN-oh-SORE-us
Name meaning: Tiny Lizard
| Diet | Herbivore |
| Height | 0.6m |
| Length | 1.5m |
| Weight | 15 kg |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Ornithopod |
| Location | North America |
Nanosaurus was a small, agile ornithopod dinosaur that scurried through the forests of Late Jurassic North America between 157.9 and 149.2 million years ago. Despite its diminutive size—measuring just 1.5 metres long and standing 60 centimetres tall at the hip—this nimble herbivore was perfectly adapted for life in the diverse ecosystems of the Morrison Formation, sharing its world with giants like Diplodocus and Allosaurus.
This ornithopod possessed a lightweight build with long, slender legs that made it an excellent runner, capable of darting quickly through undergrowth to escape predators. Its small head housed a beak-like mouth ideal for nipping off tender plant shoots, ferns, and cycads that grew close to the ground. Like other ornithopods, Nanosaurus had cheek teeth designed for processing tough plant material through repeated chewing motions.
Nanosaurus has had a particularly complex taxonomic history, having been shuffled between various genus names including Laosaurus, Othnielia, and Othnielosaurus over the decades. Modern research has resolved much of this confusion, with several of these names now considered synonyms. Today, palaeontologists classify Nanosaurus as a basal member of Neornithischia, representing an important early branch in ornithopod evolution.
What made Nanosaurus distinctive?
Nanosaurus was characterised by its exceptionally small size and gracile build, with proportionally long legs that gave it a swift, deer-like appearance. Its small skull featured the typical ornithopod beak and grinding teeth, while its lightweight skeleton was built for speed and agility.
Behaviour
Nanosaurus likely lived in small groups, using its excellent speed and manoeuvrability to evade the many predators of the Morrison Formation. Its small size would have allowed it to hide in dense vegetation and exploit food sources unavailable to larger herbivores, such as low-growing plants and shrubs.
Nanosaurus FAQ
What did Nanosaurus eat?
Nanosaurus was a herbivore that fed on low-growing plants such as ferns, cycads, and tender shoots. Its small beak was perfect for nipping off plant material, while its cheek teeth ground up tough vegetation through repeated chewing motions.
How big was Nanosaurus?
Nanosaurus was quite small, measuring about 1.5 metres in total length and standing roughly 60 centimetres tall at the hip. It weighed approximately 15 kilograms, making it one of the smaller dinosaurs from its time period.
When did Nanosaurus live?
Nanosaurus lived during the
Late Jurassic period, approximately 157.9 to 149.2 million years ago. This was a time when North America was much warmer and more humid than today, with lush forests and river systems.
Where was Nanosaurus found?
Nanosaurus fossils have been discovered in the Morrison Formation of the south-western United States, primarily in Colorado, Utah, and Wyoming. This famous rock formation has yielded many important dinosaur discoveries.
How do you pronounce Nanosaurus?
Nanosaurus is pronounced 'NAN-oh-SORE-us', with the emphasis on the first syllable. The name breaks down into 'nano' meaning tiny and 'saurus' meaning lizard.
What does Nanosaurus mean?
Nanosaurus means 'tiny lizard' in Greek, referring to its small size compared to other dinosaurs. The species name 'agilis' means swift or agile, highlighting its presumed quick movements.
How fast could Nanosaurus run?
While no specific speed estimates exist for Nanosaurus, its long, slender legs and lightweight build suggest it was quite fast for its size. It likely relied on speed and agility to escape from larger predators.
What type of dinosaur was Nanosaurus?
Nanosaurus was a small ornithopod dinosaur, specifically classified as a basal member of Neornithischia. Ornithopods were bird-hipped herbivorous dinosaurs that included famous groups like hadrosaurs and iguanodonts.
Was Nanosaurus related to birds?
As an ornithischian dinosaur, Nanosaurus was not directly related to birds. Birds evolved from theropod dinosaurs, which belonged to the saurischian group. However, all dinosaurs share common ancestry further back in their evolutionary history.
How many Nanosaurus fossils have been found?
Nanosaurus fossils are relatively rare and fragmentary, which has contributed to its complex taxonomic history. Most specimens consist of partial skeletal remains, making it one of the less well-known small dinosaurs from the Morrison Formation.
