Cambrian palaeoscolecids (Cycloneuralia) from Gondwana and reappraisal of species assigned to Palaeoscolex

► SEM analyses are paramount for correct diagnosis of palaeoscolecid fossil remains. ► Almost all Cambrian Palaeoscolex material should be reassigned outside this genus. ► Most Cambrian palaeoscolecids with Hadimopanella sclerites fall into Wronascolex.