description Trimerus Overview
Trimerus is an extinct genus of homalonotid trilobites that lived from the Silurian into the Devonian. It is recognized by a broad, weakly trilobate body, a large head with an expanded anterior margin, and a pygidium that is typically triangular; some species exceeded 20 centimeters in length. Fossils are known from North America, Europe, Australia, and other former marine settings, and the genus is relevant to studies of burrowing and trilobite biogeography.
help Trimerus FAQ
How large could Trimerus trilobites become?
Some Trimerus species exceeded 20 centimetres in length. The genus had a broad, weakly trilobate body and a large head with an expanded anterior margin.
When did Trimerus live?
Trimerus lived from the Silurian into the Devonian. It was a homalonotid trilobite found in marine fossil deposits.
What shape was the Trimerus pygidium?
The pygidium, or rear body section, was typically triangular. Along with its broad body and large head, this shape helps identify the genus.
Which trilobite group includes Trimerus?
Trimerus belongs to the homalonotid trilobites. Homalonotids are known for broad bodies and relatively weak surface segmentation compared with some other trilobite groups.
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