Assertion: great appendage arthropod | /r/HasProperty | stem-group chelicerates
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text: 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 were deuterocerebral.