''Protriacanthus'' is an
extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
genus of
ray-finned fish. It contains a single species, ''P. gortanii''.
Sources
The Paleobiology Database
Prehistoric ray-finned fish genera
Tetraodontiformes
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