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Best Illaenidae

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Best 1 Bumastus
Bumastus

A Silurian trilobite with a highly inflated, smooth exoskeleton and indistinct segmentation, found in reef-associated carbonates of North America and Europe.

2 Illaenus
Illaenus

Illaenus is an Ordovician-Silurian trilobite genus with a broad smooth cephalon and large eyes, well represented in the Baltic region.

3 Ectillaenus

A Silurian illaenid trilobite from Europe, Ectillaenus was described by Salter in 1866 and is recognized by its broad cephalon and large thorax.

4 Ananaspis
Ananaspis

Ordovician trilobite genus known from European strata, a member of the diverse mid-Paleozoic shallow-marine benthos preserved in contemporaneous shelf and slope deposits.

5 Taenicephalus

Late Cambrian trilobite from North America belonging to the Saukiidae, used as an index fossil for biostratigraphic zonation of Upper Cambrian strata.

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