Lyrarapax

Lyrarapax is a radiodont of the family Amplectobeluidae that lived in the early Cambrian period 520 million years ago. Its neural tissue indicates that the anomalocaridid great appendage is pre-protocerebral, resolving parts of the arthropod head problem and showing that the great appendage is homologous to the antennae of Onychophorans.[1] Its fossilized remains were found in Yunnan in southwestern China. A second species was described in 2016, differing principally in the morphology of its great appendages.[2]