Species
Cyrtia nikiforovae Tsegelnjuk, 1976
Synonymy list
1970     Cyrtia trapezoidalis Hisinger, 1828 — Rubel , pp. 57 pars, fig. 36:1-5; 38:1-5
1976     Cyrtia nikiforovae Tsegelnjuk, sp. nov. — Tsegelnjuk , pp. 95, fig. XII 7,8
Selection of related publications
Tsegelnjuk, P. D. 1976. Brahiopody i stratigrafiâ nižnego paleozoâ Volyno-Podolii. pp. 1-155.  Naukova Dumka. 
Rubel, M. 1970. On the distribution of brachiopods in the lowermost Llandovery of Estonia.  Eesti NSV Teaduste Akadeemia Toimetised. Keemia, Geoloogia / Известия Академии наук Эстонской ССР. Химия. Геология   19,   1,   69-79. DOI:10.3176/chem.geol.1970.1.11
Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Rhynchonelliformea | 
| Class | Rhynchonellata | 
| Order | Spiriferida | 
| Suborder | Spiriferidina | 
| Superfamily | Cyrtioidea | 
| Family | Cyrtioidae | 
| Subfamily | Cyrtiinae | 
| Genus | Cyrtia | 
| Species | exporrecta | 
| laevis | |
| nikiforovae | |
| trapezoidalis | |
| wenjukovi | 
References based on distribution
- Rubel, 1970b Suuriku cliff Jaani Stage