What is "onnia"

Onnia is a genus of trilobite from the late Ordovician of Africa, Europe, North America, and South America.

Onnia may refer to:

• Onnia (fungus), a genus of fungi in the family Hymenochaetaceae
• Onnia (trilobite), a genus of trilobite in the family Trinucleidae from the late Ordovician of Africa, Europe, North America and South America