Knowra Pleurosauridae Pleurosauridae Pleurosauridae is an extinct family of aquatic rhynchocephalian reptiles known from Jurassic and Early Cretaceous deposits in Europe. Its members had elongated bodies and tails adapted for swimming.
Rhynchocephalia : An order of lepidosaurian reptiles that includes tuatara and numerous extinct lineages. Pleurosaurids were aquatic members of this broader reptile group.
Aquatic locomotion : Movement through water by swimming, using body structures such as limbs, fins, or tails. Pleurosaurids used elongated bodies and powerful tails for aquatic movement.
Pleurosaurus : An extinct genus of long-bodied aquatic rhynchocephalians from Jurassic Europe. It is the best-known genus associated with Pleurosauridae.
Jurassic : A geologic period from about 201 to 145 million years ago, between the Triassic and Cretaceous. Many pleurosaurid fossils come from Jurassic rocks.
Ichthyosauria : An extinct group of marine reptiles with fish-shaped bodies, flippers, and large eyes. Ichthyosaurs were marine reptiles, but belonged to a different evolutionary lineage.
Lepidosauria : A major reptile group comprising lizards, snakes, and tuatara, along with their extinct relatives. This lineage provides the wider evolutionary setting for rhynchocephalians.
Undulatory locomotion : Movement produced by waves of bending that travel along an animal's body or appendages. Lateral body and tail flexion is a likely component of pleurosaurid swimming.
Pleurosaurus goldfussi : An extinct species of aquatic rhynchocephalian known from Jurassic deposits in Germany. Its fossils preserve a characteristic long-bodied pleurosaurid form.
Early Cretaceous : The first epoch of the Cretaceous Period, spanning roughly 145 to 100 million years ago. The family's fossil record extends into this epoch.
Plesiosauria : An extinct order of marine reptiles typically propelled by four large flippers. Plesiosaurs shared aquatic habitats with pleurosaurids but used a different body plan.
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