Species
Geniculina ralfi Rõõmusoks, 2004
Type specimen data
holotype: TUG TUG 1003-121, Nõmmeküla quarry, Harju county (Nõmmeküla) , Nabala Stage (Rakvere Stage, Piilse Mb.; Katian) 
Synonymy list
2004     Geniculina ralfi sp. nov. — Rõõmusoks , pp. 36-37, fig. pl. 10: 9-17
Selection of related publications
Rõõmusoks, A. 2004. Ordovician strophomenoid brachiopods of northern Estonia.  Fossilia Baltica 3, pp. 1-151.   Tartu Ülikooli geoloogia Instituut. 
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Rhynchonelliformea | 
| Class | Strophomenata | 
| Order | Strophomenida | 
| Superfamily | Strophomenoidea | 
| Family | Strophomenidae | 
| Subfamily | Furcitellinae | 
| Genus | Geniculina | 
| Species | pseudoalternata | 
| ralfi | |
| vironiensis | |
| voorensis |