Genus TRIGONIA
Kingdom / Phylum . . . . . . . . . Class / Subclass / Infraclass Division / Superorder / Order Suborder / Infraorder . . . . . . Superfamily / Family . . . . . . . Subfamily / Genus . . . . . . . . .	Animalia / Mollusca Bivalvia / Palaeoheterodonta / n.a. n.a. / n.a. / Trigonioida Trigoniina / n.a. Trigoniacea / Trigoniidae Trigoniinae / Trigonia
Age: Distribution:	Triassic - Paleocene Global
Depicted on: British Antarctic Territory, 1990 (20 p., fossil) Ethiopia, 1977 (90 c., fossil)