Cephalochordata - Craniata

Parent taxon: Craniata according to J. A. Long 2011

Sister taxa: Conodontomorpha, Myxinomorphi, Osteostracomorphii, Petromyzontomorphi, Pteraspidomorphi, Thelodontida

Subtaxa: Birkeniida, Conopiscius, Euphaneropidae, Jamoytiiformes, Jamoytius, Rhyncholepis

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Ecology: