Species
Howellella cycloptera (Hall, 1859)
Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Spiriferida |
| Suborder | Delthyridina |
| Superfamily | Delthyrioidea |
| Family | Delthyrididae |
| Subfamily | Howellellinae |
| Genus | Howellella |
| Subgenus | (Howellella) |
| Species | bragensis |
| cycloptera | |
| vanuxemi |