Genus
Orthidium Hall et Clarke, 1892
Aiheeseen liittyvät julkaisut
Egerquist, E., Holmer, L. E. 2006. Early-Middle Ordovician (Billingen- Volkhov stages) Orthide and Protorthide brachiopods from the East Baltic. GFF 128, 4, 339-348. DOI:10.1080/11035890601284339
List of species
1. Orthidium lavaensis Egerquist et Holmer, 2006 | Billingen Stage
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Orthida |
| Suborder | Orthidina |
| Superfamily | Orthoidea |
| Family | Orthidiellidae |
| Genus | Eostrophomena |
| Orthidiella | |
| Orthidium | |
| Species | gambolovensis |
| lavaensis |