Ultraviolet Light Finds a Possible Striped Tail in a 125-Million-Year-Old Crocodile Relative
Montsecosuchus depereti
A small crocodile relative that lived about 125 million years ago.
soft tissue
Body parts such as skin and cartilage, rather than hard bones.
disruptive camouflage
A pattern that breaks up an animal’s outline and makes it harder to see.
What happened
Researchers reexamined a fossil from Catalonia, Spain. It belonged to Montsecosuchus depereti, a small crocodile relative that lived about 125 million years ago. The fossil is about 50 centimeters long. It was found more than a century ago and studied partly in the 1990s. It is kept at the Museum of Natural Sciences of Barcelona.
Why ultraviolet light mattered
The new study used ultraviolet light. Fossilized tissues and nearby rock respond differently under this light. That difference makes hidden shapes stand out. The team noticed possible soft tissues while building a fossil database. The method revealed skin scales, cartilage, and other structures that normal light had left unclear.
What the fossil shows
The scales differed in shape and size across the body. The animal also lacked the tall tail fin seen in living crocodiles. Some small scales around the neck, limbs, body edges, and tail may contain sensory organs. Living crocodiles have similar organs. They can detect touch and changes in water pressure. The fossil does not prove the ancient animal used them in the same way.
The chest preserved cartilage linked with the ribs. These structures suggest an efficient breathing system. The researchers say this anatomy resembles parts of modern crocodile breathing. It also suggests a semi-aquatic lifestyle appeared early in crocodylomorph history. Crocodylomorphs are the group that includes crocodiles and their extinct relatives.
The tail clue
The most striking clue sits on the tail. Several scales show alternating light and dark bands across the tail. Researchers interpret the bands as possible original coloration. They may have broken up the animal's outline. That kind of hiding pattern is called disruptive camouflage. If the interpretation is confirmed, this could be the oldest preserved color evidence in a crocodylomorph.
Why it matters
Soft tissues usually disappear during fossilization. Bones remain much more often. This fossil came from Pedrera de Meià, an exceptional preservation site. More than 8,000 fossils have been recovered there. The site can preserve skin, cartilage, and other delicate clues. Such evidence helps scientists study more than bones. It helps them ask how early crocodylomorphs looked, breathed, and lived.
What remains unknown
The fossil does not reveal the exact colors. Researchers cannot yet prove that the bands functioned as camouflage. The possible sensory structures also need careful comparison. Future studies may test these ideas against other fossils and later crocodile relatives. For now, the result is a strong clue, not a complete picture.
The research was published in the Zoological Journal of the Linnean Society. The Catalan Institute of Paleontology also described the find.
A 125-Million-Year-Old Crocodile Relative May Have Had a Striped Tail
📰 Full story: Ultraviolet Light Finds a Possible Striped Tail in a 125-Million-Year-Old Crocodile Relative
Ultraviolet light revealed hidden skin and possible color bands in its fossil.
Montsecosuchus depereti
The scientific name of the small crocodile relative.
ultraviolet light
Light that human eyes cannot see.
disruptive camouflage
A pattern that makes an animal’s shape harder to see.
💡 The gist
- Montsecosuchus depereti was a small crocodile relative.
- Ultraviolet light revealed skin and possible tail colors.
- The bands may have helped the animal hide.
How the fossil was studied
The fossil came from Catalonia, Spain. The animal lived about 125 million years ago. The fossil is about 50 centimeters long. It was found more than 100 years ago. Researchers studied it again with ultraviolet light.
Ultraviolet light is invisible to our eyes. It made the fossil and rock respond differently. This contrast revealed hidden body details.
What scientists saw
They saw many skin scales. The scales changed in shape and size across the body. They also saw soft tissue near the chest. Some small scale areas may have held sensory organs. Modern crocodiles use similar organs to sense touch. They also sense changes in water pressure.
The chest structures suggest efficient breathing. These clues suggest a life partly in water. The animal also lacked the tall tail fin seen in living crocodiles.
Why the stripes matter
The tail showed alternating light and dark bands. Researchers think these bands may be ancient body colors. The bands may have broken up the animal's outline. This could make the animal harder to see. Scientists call this disruptive camouflage.
If confirmed, the fossil holds the oldest known crocodylomorph color evidence. Crocodylomorphs include crocodiles and their extinct relatives.
What remains uncertain
Scientists do not know the exact colors. They also cannot prove the bands worked as camouflage. The possible sensory organs need more checking.
Soft tissues rarely survive fossilization. This site preserves them unusually well. More than 8,000 fossils came from the site. The discovery helps scientists study ancient skin and breathing. It also shows why old museum fossils still matter.
A Very Old Crocodile Relative Had a Stripy Tail
📰 Full story: Ultraviolet Light Finds a Possible Striped Tail in a 125-Million-Year-Old Crocodile Relative
Special light helped scientists see hidden marks in its fossil.
Montsecosuchus depereti
The name of an old crocodile relative.
ultraviolet light
Light that our eyes cannot see.
fossil
An old body trace kept in rock.
A little crocodile relative lived long ago. Its name was Montsecosuchus depereti. It lived about 125 million years ago. Scientists found one fossil. The fossil is about 50 centimeters long. A fossil is an old body trace in rock. Scientists shone ultraviolet light on it. Ultraviolet light is light our eyes cannot see. The light showed tiny skin scales. It also showed soft parts near the chest. The tail showed light and dark bands. The bands may have been old colors. They may have helped the animal hide. But scientists are not sure yet. They do not know the exact colors. This old fossil holds clues about the animal.