description Illaenus Overview
Illaenus is a genus of trilobites that lived during the Ordovician and Silurian periods. It is characterized by a broad, relatively smooth cephalon and prominent eyes, features associated with the family Illaenidae. Fossils of Illaenus are especially well represented in the Baltic region, making the genus a familiar component of European Paleozoic fossil assemblages.
help Illaenus FAQ
When did Illaenus live?
Illaenus lived during the Ordovician and Silurian periods of the Paleozoic Era. Fossils are especially well represented in the Baltic region.
What does an Illaenus trilobite look like?
It has a broad, relatively smooth cephalon, or head, with prominent eyes. These traits are associated with the family Illaenidae.
Where are Illaenus fossils commonly found?
Illaenus fossils are strongly represented in Baltic-area rocks, including strata from regions around the ancient Baltic paleocontinent. The genus also occurred in other parts of the Ordovician and Silurian seas.
Is Illaenus related to other smooth-headed trilobites?
Yes. Illaenus belongs to Illaenidae, a family known for rounded, relatively smooth body surfaces and enrolled forms. Its closest comparisons are other illaenid trilobites rather than later Carboniferous genera.
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