Sturiones | | | +Halisauria+ | | | | | Cephalaspidæ | Rajacei \-----------v--------/ | | | | | | | Amphipneumona \-----v-------/ | | | | | Pamphracti | | +Tabuliferi+ | | (Placoganoides) | Chimæracei | +Ganoides+ | +Holocephali+ | | | | | Squalacei | | | | | | | \--------v---------/ | | | | | +Plagiostomi+ | | | | | \-------------v---------------------/ | +Selachii+ +Fish+ +Amphirrhina+ | Cyclostoma | +Monorrhina+ | | \-------v---------/ | +Craniota+
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