Genus
Trigonoglossa Dunbar et Condra, 1932
Selection of related publications
Holmer, L. E.,  Popov, L. E. 2000. Class Lingulata.  Treatise on Invertebrate Paleontology, part H Brachiopoda, pp. 30-146. 
Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Linguliformea | 
| Class | Lingulata | 
| Order | Lingulida | 
| Superfamily | Linguloidea | 
| Family | Obolidae | 
| Subfamily | Obolinae | 
| Genus | Apatobolus | 
| Euobolus | |
| Expellobolus | |
| Foveola | |
| Leptembolon | |
| Lingulella | |
| Mytoella | |
| Obolus | |
| Oepikites | |
| Paldiskites | |
| Ralfia | |
| Rebrovia | |
| Schmidtites | |
| Spinilingula | |
| Trigonoglossa | |
| Ungula | |
| Westonia | 
References based on distribution
- Holmer & Popov, 2000 Silurian