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Paraceraurus

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description Paraceraurus Overview

Paraceraurus is an extinct genus of cheirurid trilobite that lived during the Ordovician period. Fossils of this marine arthropod are widespread across Baltoscandia, particularly in regions corresponding to modern-day Sweden, Estonia, and Russia. It is distinguished by its heavily ornamented, spiny exoskeleton, which features elongated genal spines and prominently textured pleural lobes. Paleontologists study these well-preserved fossils to understand the biodiversity and ecological dynamics of early Paleozoic sea floors.

help Paraceraurus FAQ

What kind of fossil is Paraceraurus?

Paraceraurus is an extinct genus of cheirurid trilobite from the Ordovician Period. Trilobites were marine arthropods, so Paraceraurus fossils represent an ancient seafloor animal rather than a land insect.

Where have Paraceraurus fossils been found?

The genus is associated with Ordovician rocks across Baltoscandia, including areas corresponding to modern Sweden, Estonia, and Russia. That regional distribution makes it useful in studying ancient Baltic paleoenvironments.

What did Paraceraurus look like?

It had the segmented exoskeleton typical of trilobites, with a distinctive heavily ornamented and spiny form. The tail shield, or pygidium, is an important part of the morphology used to distinguish cheirurid trilobites.

How old are Paraceraurus fossils?

They date from the Ordovician, a geological period that preceded the Silurian and was hundreds of millions of years before the dinosaurs. Baltoscandian Ordovician strata contain many trilobite genera used for detailed fossil correlation. [Geological Survey reference on Baltoscandian trilobites](https://kirjandus.geoloogia.info/en/reference/2138)

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