†Trigonodesma Wood 1864 (clam)
PaleoDB taxon number: 16320
Parent taxon: Striarcinae according to H. E. Vokes 1980
Sister taxa: Breviarca, Ovalarca, Sanoarca, Striarca
Subtaxa: Trigonodesma (Scapularca), Trigonodesma buxellensis, Trigonodesma lissa
Ecology: facultatively mobile epifaunal suspension feeder