Species
Leptaena (Leptaena) altera Rybnikova, 1966
Synonymy list
1966     Leptaena altera sp. nov. — Rybnikova , pp. 78, fig. pl. 1: 4-6
1967     Leptagonia altera (Rybnikova, 1966) — Rybnikova , pp. 193, fig. pl. 18: 4-6
2004     Leptaena altera Rybnikova, 1966 — Musteikis et Cocks , fig. figs 4H-O
2011     Leptaena (Leptaena) altera Rybnikova, 1966 — Rubel , pp. 19-20, fig. pl. 2: 1-9
Selection of related publications
Rubel, M. 2011. Silurian brachiopods Dictyonellida, Strophomenida, Productida, Orthotetida, Protorthida and Orthida from Estonia.  Fossilia Baltica 4, pp. 1-133.   Tartu Ülikooli geoloogia instituut. 
Rybnikova, M. V. 1966. Brachiopods Strophomenida of the Upper Silurian deposits of Latvia.  Palaeontology and stratigraphy of the Baltic and the Byelorussia. Number I, pp. 75-95.   Mintis. 
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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) | 
| Species | bergstroemi | 
| acuta | |
| acuteplicata | |
| altera | |
| crassorugata | |
| depressa | |
| ennessbe | |
| fluviatilis | |
| friedrichi | |
| haverfordensis | |
| inaequalis | |
| indigena | |
| ingrica | |
| laterorugata | |
| palmrei | |
| paucirugata | |
| pertenuis | |
| planitia | |
| purpurea | |
| rhomboidalis | |
| rugosa | |
| rugosoides | |
| sperion | |
| spumifera | |
| tarwanpensis | |
| taxilla | |
| undosa | 
References based on distribution
- Rubel, 2011 Kalvarija borehole 732.8 - 832.6 Jaani Stage
- Rubel, 2011 Ohesaare borehole 271.12 - 312.57 Jaani Stage
- Rybnikova, 1966 Ezere 9 borehole 1081.3 - 1081.3 Ludlow
- Rybnikova, 1966 Akniste borehole 556 - 562 Ludlow