Species
Obolus apollinis Eichwald, 1829
Synonymy list
1829     Obolus apollinis — Eichwald , pp. 274, fig. 4:5
1840     Obolus apollinis m. — Eichwald , pp. 167-169
1840     Obolus apollinis m. — Eichwald , pp. 194-196
1856     Obolus apollinis — Eichwald , pp. 453
1857     Obolus apollinis — Eichwald , pp. 120
1860     Obolus apollinis m. — Eichwald , pp. 925
1861     Obolus apollinis — Eichwald , pp. 264
1896     Obolus apollinis — Mickwitz , pp. 133, fig. 1:1-14
1969     Obolus (Obolus) apollinis Eichwald, 1829 — Gorjansky , pp. 20, fig. 1:1-9
1973     Obolus cf. apollinis Eichwald, 1829 — Biernat , pp. 54, fig. 3:7
Selection of related publications
Lang, L. 2015. Baculate shell structure in Early Palaeozoic linguliform brachiopods.  Dissertationes Geologicae Universitatis Tartuensis   40,      1-113.  University of Tartu Press. 
Lang, L., Uibopuu, E., Puura, I. 2011. Nanostructures in Palaeozoic linguloid brachiopods.  Memoirs of the Association of Australasian Palaeontologists   41,      359−366.
Popov, L. E., Holmer, L. E. 2003. Understanding linguloid brachiopods: Obolus and Ungula as examples.  Carnets de Géologie      6,   1-13.
Puura, I. 1996. Lingulate brachiopods and biostratigraphy of the Cambrian-Ordovician boundary beds in Baltoscandia.  Doctoral Thesis, pp. 1-214.   Uppsala University. 
Kaljo, D., Borovko, N., Heinsalu, H., Khazanovich, K., Mens, K., Popov, L., Sergejeva, S., Sobolevskaya, R., Viira, V. 1986. The Cambrian-Ordovician boundary in the Baltic-Ladoga clint area (North Estonia and Leningrad Region, USSR).  Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология   35,   3,   97-108. DOI:10.3176/geol.1986.3.01
Eichwald, E. 1860. Lethaea Rossica ou Paléontologie de la Russie. Premier volume. Ancienne Période en deux sections. pp. XIX+1–1657.  E. Schweizerbart.  DOI:10.5962/bhl.title.52391
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Klassificering
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Linguliformea | 
| Class | Lingulata | 
| Order | Lingulida | 
| Superfamily | Linguloidea | 
| Family | Obolidae | 
| Subfamily | Obolinae | 
| Genus | Obolus | 
| Species | apollinis | 
| eichwaldi | |
| rebrovi | |
| ruchini | |
| transversus | 
References based on distribution
- Kaljo et al., 1986a Lava River, Leningrad Oblast
- Popov & Holmer, 2003 Borehole No. R-1653 Upper Cambrian (old nomenclature)
- Eichwald, 1860a Paldiski