''Triazeugacanthus'' is an extinct genus of
spiny shark
Acanthodii or acanthodians is an extinct class of gnathostomes (jawed fishes). They are currently considered to represent a paraphyletic grade of various fish lineages basal to extant Chondrichthyes, which includes living sharks, rays, and chi ...
from the
Devonian
The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian per ...
of Canada. It contains a
single species, ''Triazeugacanthus affinis''. With total length up to , it is known from multiple ontogenetic stages.
References
Acanthodiformes
Late Devonian cartilaginous fish
Devonian cartilaginous fish of North America
Monotypic cartilaginous fish genera
{{Acanthodii-stub