Synonyms: Trigonognathus aff. kabeyai, Trigonotodus kabeyai
Common name: Viper dogfish
Original description species: Mochizuki & Ohe, 1990
Genus: Trigonognathus Mochizuki & Ohe, 1990
Family: Etmopteridae Fowler, 1934
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii