Extinct genus of cartilaginous fishes
Triazeugacanthus is an extinct genus of spiny shark from the Devonian of Canada. It contains a single species , Triazeugacanthus affinis .[1] With total length up to 5.272 centimetres (2.076 in), it is known from multiple ontogenetic stages.[2]
† Cassidiceps
† Euthacanthus
† Latviacanthus
† Ramirosuarezia ?
† Sinacanthidae
Hunanacanthus
Neosinacanthus
Sinacanthus
Tarimacanthus
† "Ischnacanthiformes "
Acanthospina
Campylodus
Granulacanthus
Machaeracanthus ?
Onchus
Serradentus
Acritolepidae Ischnacanthidae
Arcticacanthus
Arenaceacanthus
Atopacanthus
Bracteatacanthus
Cacheacanthus
Erymnacanthus
Euryacanthus
Gomphonchus
Grenfellacanthus
Ischnacanthus
Marsdenius ?
Persacanthus
Plectrodus
Rockycampacanthus
Rohonilepis
Taemasacanthus
Tricuspicanthus
Xylacanthus
Podoliacanthidae Poracanthodidae
Gomphonchoporus
Machaeraporus
Obruchevacanthus ?
Poracanthodes
Radioporacanthodes
Taimyrolepis
Trundlelepis
Zemlyacanthus
† Diplacanthiformes
† Acanthodiformes
"Climatiiformes " and related taxa
† Climatiidae† Gyracanthidae "Conventionally defined chondrichthyans"
"Conventionally defined chondrichthyans"
"Conventionally defined chondrichthyans"
† Altholepidiformes?† Elegestolepidida?
† Mongolepidida ?
Mongolepididae
Mongolepis
Rongolepis
Sodolepis
Taklamakanolepis
Teslepis
Shiqianolepidae
Chenolepis
Shiqianolepis
Tielikewatielepis
Xiaohaizilepis
Xinjiangichthys
† Tchunacanthidae
Fecundosquama
Lenacanthus
Tchunacanthus
† Vesperaliidae
Acanthacanthus
Vesperalia
Others
† Canyonlepis ?
† Frigorilepis ?
† Funicristata
† Gualepis
† Ivanelepis
† Jolepis
† Karksilepis
† Lunalepis
† Nobilesquama
† Nostolepis
† Nostovicina
† Ohiolepis
† Seretolepis
† Tuvalepis
† Wellingtonella ?
† Yuanolepis