Subgenus
Leptaena (Ygdrasilomena) Cocks, 2005
Selection of related publications
Cocks, L. R. M. 2005. Strophomenate Brachiopods from the late Ordovician Boda Limestone of Sweden: their systematics and implications for palaeogeography.  Journal of Systematic Palaeontology   30,   3,   243-282. DOI:10.1017/S1477201905001616
List of species
1. Leptaena (Ygdrasilomena) roomusoksi Cocks, 2005 | Upper Ordovician
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Rhynchonelliformea | 
| Class | Strophomenata | 
| Order | Strophomenida | 
| Superfamily | Strophomenoidea | 
| Family | Rafinesquinidae | 
| Subfamily | Leptaeninae | 
| Genus | Leptaena | 
| Subgenus | (Leptaena) | 
| (Septomena) | |
| (Ygdrasilomena) | |
| Species | roomusoksi | 
| bohemica | |
| candata | |
| parvirugata | |
| venzavensis | |
| wesenbergensis |