Tariccoia arrusensis
Ordovician (Caradocian)
Puddinga Sequence – Unit A
Fluminimaggiore, Sardinia, Italy

16mm on 73mm slab

Arthropod, Nektaspidae

See: http://en.wikipedia.org/wiki/Tariccoia

Tariccoia, like Naroia, has been considered a “soft-bodied trilobite” but most researchers have deemed it a member of a different group related to trilobites.