Losillasaurus Facts
Pronunciation: loh-see-ah-SORE-us
Name meaning: Lizard from Losilla
| Diet | Herbivore |
| Height | 5m |
| Length | 16m |
| Weight | 13.5 tonnes |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Sauropod |
| Location | Spain |
Losillasaurus giganteus was a massive sauropod dinosaur that thundered across southeastern Spain during the Late Jurassic period, approximately 154-152 million years ago. This enormous herbivore represents one of Europe's largest known dinosaurs, with fossil remains discovered in the Villar del Arzobispo Formation near Valencia. Despite being known from a subadult specimen, Losillasaurus already demonstrated impressive proportions that rival some of the world's largest dinosaurs.
As a typical sauropod, Losillasaurus possessed the classic long-necked body plan with a small head, elongated neck, barrel-shaped body, and whip-like tail. The creature walked on four pillar-like legs and used its extended neck to browse vegetation from treetops that other herbivores couldn't reach. Its powerful limbs, including a remarkable 143-centimetre-long humerus bone, supported its massive frame as it moved through the lush Late Jurassic landscapes of ancient Spain.
Losillasaurus belongs to the Turiasauria, a group of sauropods particularly common in Europe during the Late Jurassic and Early Cretaceous periods. Like other sauropods, it was a peaceful giant that spent most of its time feeding on ferns, conifers, and other available vegetation. Its teeth were designed for stripping leaves rather than chewing, so it likely swallowed stones to help grind up plant material in its stomach.
The holotype specimen includes remarkably complete remains, featuring skull fragments, vertebrae from the entire spine, limb bones, pelvic elements, and even sternal plates. This comprehensive fossil material makes Losillasaurus one of the best-known large sauropods from Europe, providing valuable insights into the diversity of these magnificent giants that once roamed the continent.
What made Losillasaurus distinctive?
Losillasaurus was characterised by the distinctive dimension and shape of the neural spines on its proximal caudal vertebrae near the base of its tail. Its enormous humerus bone, measuring 143 centimetres in length, was proportionally massive even for a sauropod of its size.
Behaviour
Like other sauropods, Losillasaurus was likely a peaceful browser that moved in herds across Late Jurassic Spain. It would have spent most of its day feeding, using its long neck to reach high vegetation and potentially rearing up on its hind legs to access the tallest trees.
Discovery
Losillasaurus was first described by Casanovas, Santafé, and Sanz in 2001. The original fossils were discovered at Villar del Arzobispo Formation, Valencia, Spain.
Losillasaurus FAQ
What did Losillasaurus eat?
Losillasaurus was a herbivore that fed on the abundant plant life of
Late Jurassic Spain, including ferns, conifers, cycads, and other vegetation. It used its long neck to browse from treetops and likely swallowed gastroliths (stomach stones) to help digest tough plant material.
How big was Losillasaurus?
Losillasaurus reached an estimated 16 metres in length, stood about 5 metres tall at the hip, and weighed approximately 13.5 tonnes. Remarkably, these measurements are from a subadult specimen, so fully grown adults may have been even larger.
When did Losillasaurus live?
Losillasaurus lived during the
Late Jurassic period, approximately 154.8 to 152.21 million years ago, during the Kimmeridgian age. This was a time when Europe consisted of tropical islands surrounded by warm, shallow seas.
Where was Losillasaurus found?
Losillasaurus fossils were discovered in the Villar del Arzobispo Formation near Valencia in southeastern Spain. This region has proven to be one of Europe's most important dinosaur fossil sites from the
Late Jurassic period.
How do you pronounce Losillasaurus?
Losillasaurus is pronounced 'loh-see-ah-SORE-us', with emphasis on the 'SORE' syllable. The name refers to the Losilla locality where the fossils were discovered in Spain.
What does Losillasaurus mean?
Losillasaurus means 'Lizard from Losilla', named after the Losilla locality in Valencia, Spain, where the fossils were discovered. The species name 'giganteus' refers to its enormous size.
How fast could Losillasaurus run?
Like most large sauropods, Losillasaurus was not built for speed. Its massive size and body structure suggest it moved at a steady walking pace, probably no faster than 10-15 km/h, similar to modern elephants.
What type of dinosaur was Losillasaurus?
Losillasaurus was a sauropod dinosaur, specifically belonging to the family Turiasauridae. Sauropods were the largest land animals ever to exist, characterised by their long necks, small heads, massive bodies, and long tails.
Was Losillasaurus related to birds?
As a sauropod, Losillasaurus belonged to the saurischian (lizard-hipped) dinosaurs, the same major group that gave rise to birds. However, sauropods represent a different evolutionary branch and are not direct ancestors to modern birds, which evolved from theropod dinosaurs.
How many Losillasaurus fossils have been found?
Losillasaurus is known primarily from one remarkably complete holotype specimen that includes skull fragments, vertebrae from throughout the spine, limb bones, pelvic elements, and sternal plates. This makes it one of the most complete large European sauropod discoveries.
