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Stenopterygius quadriscissus

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description Stenopterygius quadriscissus Overview

Stenopterygius quadriscissus was a marine ichthyosaur that lived during the Early Jurassic and is especially well represented in the Posidonia Shale near Holzmaden, Germany. Fossils from these deposits preserve articulated skeletons, body outlines and, in some individuals, embryos inside the body cavity. These specimens provide direct evidence that ichthyosaurs gave birth to live young rather than laying eggs on land.

help Stenopterygius quadriscissus FAQ

Where are the best Stenopterygius quadriscissus fossils found?

The most exceptionally preserved specimens of Stenopterygius quadriscissus are found in the Posidonia Shale deposit near Holzmaden, Germany. Fossils from this Early Jurassic location often retain fully articulated skeletons, soft tissue body outlines, and even preserved embryos.

Did Stenopterygius quadriscissus lay eggs or give birth to live young?

Paleontologists have found fossil evidence of Stenopterygius quadriscissus embryos inside the ribcages of adult specimens, proving they gave birth to live young. This adaptation allowed the marine reptiles to live entirely in the ocean without needing to return to land to lay eggs.

How old is the Stenopterygius quadriscissus species?

This specific species of ichthyosaur lived during the Early Jurassic period, roughly 180 to 190 million years ago. They were highly adapted marine predators that thrived in the shallow seas covering what is now Europe.

What did the Stenopterygius quadriscissus eat?

The sharp teeth and streamlined jaws of Stenopterygius quadriscissus indicate it was a carnivore that likely fed on a diet of fish and belemnites. Fossilized stomach contents found in specimens from the Holzmaden deposits have helped confirm these dietary habits.

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