A Steneosaurus bollensis fossil plate.
A Lower Jurassic Steneosaurus bollensis fossil plate.
A detailed image of a Steneosaurus bollensis fossil plate.
A close up of a Steneosaurus bollensis fossil plate.

Steneosaurus bollensis - Sovereign of the Jurassic Seas


Specifications

Origin:Urweltsteinbruch Holzmaden Quarry, Baden-Württemberg, Germany
Age:Lower Jurassic (Toarcian, “Lias ε”), circa 180 Million Years Ago
Size:H180cm W180cm D7cm

A Fossil’s Silent Story

Behold a relic of ancient seas: a skeleton curled backward, as if caught in the final whisper of life. Its posture, a dance of decay and muscle, reveals bones preserved in stunning detail, each surface a map of a forgotten world, inviting wonder and awe: the semiaquatic teleosaurid Steneosaurus bollensis.

Teleosaurids roamed the margins of ancient waters, shallow seas, brackish estuaries, and tranquil freshwater havens, embodying the essence of semiaquatic life along the coasts.

The fossil reveals its secrets in exquisite detail, bone surfaces so finely preserved they seem to breathe, with some areas artfully exposed in three dimensions, as if the past itself had been sculpted for our wonder.

Sovereign of the Jurassic Seas

Steneosaurus bollensis ruled the shallow epicontinental waters, its elongated form slicing through the Tethyan margins with the grace of a shadow. A predator of speed and precision, its streamlined skull and interlocking teeth spoke of a life devoted to the hunt.

Here, in the heart of the Early Jurassic, Steneosaurus reigned as a member of the Teleosauroidea, a clade of crocodylomorphs that painted the coastal waters with their presence. For nearly two hundred years, this genus has stood as a beacon of understanding, its many species illuminating the diversity and abundance of a world long submerged.

Legacy of the Teleosauroidea

The fossils of Holzmaden, cradled in the Posidonia Shale, are more than stone and bone, they are echoes of soft tissue and fleeting moments, offering a window into the paleoecology of a vanished age.

This extraordinary find was accompanied by its certificate from the State Museum of Natural History Stuttgart and it has already found a home. 

It became not just a specimen, but a story, one of evolution, adaptation, and the eternal dialogue between predator and prey.

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