About
Scipionyx samniticus stands as one of the most extraordinary dinosaur discoveries ever made, not for its sizeāthe only known specimen measures just 24 centimetersābut for its unprecedented preservation. This tiny , found in Early Cretaceous limestone deposits near Pietraroja in southern Italy, retained fossilized soft tissues including intestines, liver, muscle fibers, and windpipe cartilage, offering scientists an unparalleled window into dinosaur internal anatomy.
The juvenile specimen, affectionately nicknamed 'Ciro' by the Italian public, belonged to the Compsognathidae familyāsmall, agile predators that flourished during the Jurassic and Cretaceous periods. With its elongated neck, grasping hands bearing sharp claws, and slender legs built for speed, Scipionyx would have been an active hunter of insects, small lizards, and fish in the shallow lagoon environment of what is now the Italian peninsula.
The fossil's discovery by amateur collector Giovanni Todesco in 1981 marked a watershed moment for Italian paleontology, as dinosaur remains had never before been found in the country. When formally described in 1998 by Cristiano Dal Sasso and Marco Signore, the specimen's soft tissue preservation astonished researchers worldwide. Subsequent detailed studies published in 2011 revealed the most complete picture of theropod internal anatomy ever documented, including evidence of the animal's last meal preserved within its digestive tract.
Explore the anatomy
4 featuresThe Ciro specimen preserved something mind-blowing: actual traces of intestines, liver, and windpipe cartilage, still in place after 110 million years. This is the most complete soft-tissue record ever found in a non-bird dinosaur! Detailed scans showed the liver sat tight against the ribcage, suggesting these dinosaurs breathed using a pumping system similar to modern crocodiles.
A long, flexible neck made this little predator a lightning-fast striker, perfect for snatching small prey. Even more exciting, preserved muscle traces around the neck bones give scientists rare direct proof of exactly where the muscles attached ā a window into how early feathered dinosaur relatives actually moved.
Three-fingered hands tipped with sharp, curved claws were built for snatching ā not just sitting there looking cool. Scientists comparing these hands to relatives like Compsognathus believe each finger could move independently and quickly, a useful trick that later evolved into the grasping abilities of birds' ancestors.
Long shin bones compared to thigh bones are a classic sign of a fast runner, and Scipionyx had exactly that build. Since the Ciro fossil is a baby, scientists can only estimate how speedy the adults were by comparing it to similar dinosaurs ā but this little one was clearly born to run.
Keep exploring the vault

Compsognathus
Compsognathus longipes
Both are compsognathid theropods representing the same small-bodied, agile predator body plan.

Sinosauropteryx
Sinosauropteryx prima
Fellow compsognathids exploring the same ecological niche of small cursorial predator.

Microraptor
Microraptor gui
Both represent Early Cretaceous small theropods with exceptional soft tissue preservation revealing diet (Scipionyx gut contents, Microraptor stomach contents with fish and birds).

Beipiao Lizard
Beipiaosaurus inexpectus
Both Early Cretaceous theropods known from exceptional preservation (Scipionyx soft tissues in Italian lagerstƤtte, Beipiaosaurus feathers in Chinese lagerstƤtte).
