Tunicata
Cephalochordata
Myxinoidea
Petromyzontida
Conodonta
Pharyngolepis
Rhyncholepis
Jamoytius
Euphanerops
Anaspida
Athenaegis
cyathaspid
pteraspid
Astraspis
Arandaspida
Heterostraci
Sphenonectris_turnerae
Tremataspi
Ateleaspis
Zenaspis
Osteostraci
jawed_vertebrates
cg_Chondrichthyes
Cladoselache
Arthrodira
Acanthothoraci
Eugaleaspidiformes
Polybranchiaspidida
Galeaspida
Furcacauda
Turinia_pagei
Sheilia_taiti
Loganellia
Phlebolepis_elegans