Arthropod head problem
Cotton and Braddy
#### Cotton and Braddy

Trevor Cotton and Simon Braddy, in a comprehensive cladistic analysis of Cambrian arthropods, also proposed that the great appendage arthropods were stem\-group chelicerates; accepting that *Fuxianhuia* and relatives possessed two preoral appendages, they defended the classical view that the great appendage and the chelicerae were tritocerebral in origin; i.e. that the antennae of *[Fuxianhuia](/wiki/Fuxianhuia "Fuxianhuia")* were deuterocerebral.


Are there any modern-day organisms that exhibit similar traits to Fuxianhuia?