Species
Trigrammaria estonica (Rõõmusoks, 1985)
Synonymy list
1985     Microtrypa estonica sp. nov. — Rõõmusoks , pp. 137, fig. pl. 3: 1-8 (non fig. 9)
2004     Trigrammaria estonica (Rõõmusoks, 1985) — Rõõmusoks , pp. 32-33, fig. pl. 9: 1-3
Selection of related publications
Rõõmusoks, A. 2004. Ordovician strophomenoid brachiopods of northern Estonia.  Fossilia Baltica 3, pp. 1-151.   Tartu Ülikooli geoloogia Instituut. 
Rõõmusoks, A. 1985. The genera Trigrammaria and Microtrypa (Strophomenidae) in the Ordovician of Baltoscandia.  Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология   34,   4,   133-140. DOI:10.3176/geol.1985.4.03
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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 | Trigrammaria | 
| Species | estonica | 
| minima | 
References based on distribution
- Rõõmusoks, 1985 Munalaskme Rakvere Stage