Asaphus expansus

Asaphus expansus is the type species of the asaphid trilobite genus Asaphus. It was previously classified as Entomostracites expansus before being split off into its own genus.

Location
Most specimens have been obtained in Northern Europe, with one known exeption being in North America.

Characteristics
Asaphus expansus differs from related species in its genus by having a cranidium that is considered broad, as opposed to its more medium sized counterparts. Examples of these other species are A. fallax and A. raniceps.