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Sword Dragon of Dorset (Xiphodracon goldencapensis) - New Jurassic Ichthyosaur Discovery

Scientists have discovered a remarkably preserved Jurassic marine reptile in England, shedding new light on ancient ocean predators that lived alongside early dinosaurs.

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A near-complete ichthyosaur, Xiphodracon goldencapensis, from Dorset’s Jurassic Coast reveals an earlier faunal turnover and continues the fossil legacy of Mary Anning

This article is based on a new release by University of Manchester - Oct 10, 2025, and the Open Access (CC BY 4.0) Journal Article (Lomax et al, 2025) from Papers in Paleontology.

Unearthing the Sword Dragon of Dorset: A new Jurassic predator emerges 190 million years later from the same cliffs made famous by Mary Anning

Along the wave-beaten cliffs of England’s Jurassic Coast, a place that has yielded marine reptile fossils for more than two centuries, scientists have unveiled a remarkable new species of ichthyosaur nicknamed the "Sword Dragon of Dorset." Officially named Xiphodracon goldencapensis, this dolphin-shaped predator is one of the most important marine reptile discoveries in decades, revealing a hidden chapter in evolution during a time scientists previously knew very little about.

Fittingly, this discovery comes from the same coastline made famous by one of the greatest fossil hunters in history, Mary Anning. More than 200 years after Anning first began pulling "sea dragons" from the cliffs around Lyme Regis, the Jurassic Coast is still rewriting the history of prehistoric life.

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A Fossil from a Forgotten Time

The fossil was discovered near Golden Cap in Dorset in 2001 by fossil collector Chris Moore. It then sat unnoticed in a museum collection until recently. When scientists finally studied the nearly complete skeleton, they realized they were looking at something entirely new; a species unlike any known ichthyosaur.

The animal lived around 190 million years ago during the Early Jurassic, in a poorly understood interval called the Pliensbachian. While fossils from before and after this period are relatively abundant, remains from the Pliensbachian are extraordinarily rare. That made Xiphodracon a once-in-a-generation discovery.

The skeleton is one of the most complete specimens ever recovered from this time period. With its enormous eye sockets and long, sword-like snout, the animal would have been a swift predator, feeding on fish and squid in warm Jurassic seas. Scientists estimate it reached about 10 feet long — large enough to be formidable, yet built for speed rather than brute force.

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A Dragon with a Story Written in Bone

The fossil tells more than just a tale of anatomy, it reveals the final moments of the animal’s life. Bite marks on the skull suggest it was attacked by another massive predator, likely a larger ichthyosaur. Abnormal bone development in the limbs hints at injuries or disease suffered while alive. This was not a tranquil ocean paradise. The Jurassic seas were arenas of survival, and the Sword Dragon did not die peacefully.

Even more striking are the bizarre features that set Xiphodracon apart from every known ichthyosaur. One skull bone near the nostrils is covered in strange prong-like projections never before seen in a marine reptile. Scientists believe these may have supported specialized salt glands; evidence that this species had already developed advanced adaptations for life at sea.

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Solving a 190-Million-Year-Old Puzzle

For decades, paleontologists suspected something unusual happened during the Pliensbachian Age, but they lacked the fossils to prove it. Then along came the Sword Dragon.

Before the Pliensbachian, Early Jurassic seas were dominated by ichthyosaurs like Ichthyosaurus and Leptonectes. Afterward, entirely different lineages ruled. Xiphodracon belongs to a group more closely related to later species than earlier ones — meaning the evolutionary shift had already begun earlier than scientists realized.

This single fossil confirms that a major turnover in species was underway, even though the oceans may have looked peaceful on the surface. Beneath the waves, ecosystems were changing rapidly.

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The Cliffside Legacy of Mary Anning

This discovery follows directly in the footsteps of Mary Anning, the pioneering fossil hunter who transformed science from the cliffs of Dorset in the early 1800s. As a young woman collecting fossils for survival, not fame, Anning uncovered the world’s first complete ichthyosaurs — the very animals that would one day lead to discoveries like Xiphodracon.

Long before paleontology was a formal science, Anning revealed to the world that “dragons” once ruled the seas. Today, the fossils she made famous still surface from those same cliffs, carrying new secrets from the deep past.

If you’d like to explore her extraordinary story — and how one working-class woman reshaped science forever — read my new book and Discover Mary Anning and the Jurassic Coast.

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Journal Article:
Lomax, D.R., Massare, J.A. and Maxwell, E.E. (2025), A new long and narrow-snouted ichthyosaur illuminates a complex faunal turnover during an undersampled Early Jurassic (Pliensbachian) interval. Papers in Paleontology, 11: e70038. https://doi.org/10.1002/spp2.70038.

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