Sail backs were all the rage back in the Mesozoic. Some spinosaurs had them, with Spinosaurus itself bearing one of the most ornate of all, as well as the herbivorous Ouranosaurus, the shark-finned Concavenator, and the strange Deinocheirus, among others. And now, thanks to paleontologist José Miguel Gasulla and colleagues, another high-spined dinosaur has joined the club.
The Early Cretaceous herbivore, named Morelladon beltrani, didn’t have the most ornate ornament of the various sailbacks. The tall spines would have given it more of a high, narrow bump, superficially similar to the midline ridge of the carnivorous Acrocanthosaurus that was terrorizing North America around the same time.
What has continued to puzzle paleontologists, however, is why so many lineages of dinosaurs repeatedly evolved tall backs. No one knows for sure. The answer isn’t environmental, as high-spined dinosaurs lived in disparate habitats, and hot-running dinosaurs did not require sails to heat up, as early hypotheses supposed. The frontrunner right now is that they evolved for decoration, either to impress potential mates, intimidate rivals, or help members of the same species identify each other at a distance.
The latter possibility might be a good fit for Morelladon. During the Early Cretaceous, Gasulla and colleagues write, the Iberian Peninsula was home to a diverse group of dinosaurs that were variations on the theme of Iguanodon. They were so similar to each other that paleontologists have only just started to recognize how many different species and genera there were within a collection of bones that used to bear the Iguanodon title, and so it may be that the high spines of Morelladon helped the dinosaur stick with its own kind and avoid embarrassing encounters like approaching the wrong species come mating season.
Fossil Facts
Name: Morelladon beltrani
Meaning: Morelladon means “Morella tooth” in reference to the place the dinosaur was found, and beltrani honors Victor Beltrán “for his involvement and collaboration in the localization of the different fossil sites at the Mas de la Parreta Quarry.”
Age: Around 125 million years old.
Where in the world?: Castellón, eastern Spain.
What sort of critter?: An ornithopod dinosaur related to Iguanodon.
Size: About 20 feet long, similar to its relative Mantellisaurus.
How much of the creature’s body is known?: A tooth, six nearly-complete vertebrae and additional fragments of spine, the sacrum, most of the hips, a tibia, rib fragments, and two chevrons.
Reference:
Gasulla, J., Escaso, F., Narváez, I., Ortega, F., Sanz, J. 2015. A new sail-backed styracosternan (Dinosauria: Ornithopoda) from the Early Cretaceous of Morella, Spain. PLOS ONE. doi:10.1371/journal.pone.0144167
Previous Paleo Profiles:
The Unfortunate Dragon
The Cross Lizard
The Cross Lizard
The South China Lizard
Zhenyuan Sun’s dragon
Zhenyuan Sun’s dragon
The Fascinating Scrap
The Fascinating Scrap
The Sloth Claw
The Hefty Kangaroo
Mathison’s Fox
Scar Face
The Rain-Maker Lizard
“Lightning Claw”
The Ancient Agama
The Hell-Hound
The Hell-Hound
The Cutting Shears of Kimbeto Wash
The False Moose
“Miss Piggy” the Prehistoric Turtle
Mexico’s “Bird Mimic”
The Greatest Auk
Catalonia’s Little Ape
Pakistan’s Butterfly-Faced Beast
The Head of the Devil
Spain’s Megatoothed Croc
The Smoke Hill Bird
The Vereda Hilarco Beast
The North’s Sailback
Amidala’s Strange Horn
The Northern Mantis Shrimp
Go Further
Animals
- This ‘saber-toothed’ salmon wasn’t quite what we thoughtThis ‘saber-toothed’ salmon wasn’t quite what we thought
- Why this rhino-zebra friendship makes perfect senseWhy this rhino-zebra friendship makes perfect sense
- When did bioluminescence evolve? It’s older than we thought.When did bioluminescence evolve? It’s older than we thought.
- Soy, skim … spider. Are any of these technically milk?Soy, skim … spider. Are any of these technically milk?
- This pristine piece of the Amazon shows nature’s resilienceThis pristine piece of the Amazon shows nature’s resilience
Environment
- This pristine piece of the Amazon shows nature’s resilienceThis pristine piece of the Amazon shows nature’s resilience
- Listen to 30 years of climate change transformed into haunting musicListen to 30 years of climate change transformed into haunting music
- This ancient society tried to stop El Niño—with child sacrificeThis ancient society tried to stop El Niño—with child sacrifice
- U.S. plans to clean its drinking water. What does that mean?U.S. plans to clean its drinking water. What does that mean?
History & Culture
- Meet the original members of the tortured poets departmentMeet the original members of the tortured poets department
- Séances at the White House? Why these first ladies turned to the occultSéances at the White House? Why these first ladies turned to the occult
- Gambling is everywhere now. When is that a problem?Gambling is everywhere now. When is that a problem?
- Beauty is pain—at least it was in 17th-century SpainBeauty is pain—at least it was in 17th-century Spain
- The real spies who inspired ‘The Ministry of Ungentlemanly Warfare’The real spies who inspired ‘The Ministry of Ungentlemanly Warfare’
Science
- Here's how astronomers found one of the rarest phenomenons in spaceHere's how astronomers found one of the rarest phenomenons in space
- Not an extrovert or introvert? There’s a word for that.Not an extrovert or introvert? There’s a word for that.
- NASA has a plan to clean up space junk—but is going green enough?NASA has a plan to clean up space junk—but is going green enough?
- Soy, skim … spider. Are any of these technically milk?Soy, skim … spider. Are any of these technically milk?
Travel
- What it's like to hike the Camino del Mayab in MexicoWhat it's like to hike the Camino del Mayab in Mexico
- Is this small English town Yorkshire's culinary capital?Is this small English town Yorkshire's culinary capital?
- This chef is taking Indian cuisine in a bold new directionThis chef is taking Indian cuisine in a bold new direction
- Follow in the footsteps of Robin Hood in Sherwood ForestFollow in the footsteps of Robin Hood in Sherwood Forest