Species
Glyptorthis plana Rõõmusoks, 1964
Type specimen data
holotype: TUG TUG 54-89, Mõnuste quarry, Harjumaa (Estonia, Mõnuste) , Vormsi Stage (Vormsi Stage; Katian) 
Synonymy list
1964     Glyptorthis plana sp. nov. — Rõõmusoks , pp. 3-6, fig. 1: 1-5; text-figs 1-2
2008     Glyptorthis plana Rõõmusoks, 1964 — Zuykov & Butts , pp. 197, fig. 2.8
Selection of related publications
Hints, L., Hints, O., Nemliher, R., Nõlvak, J. 2007. Hulterstad brachiopods and associated faunas in the Vormsi Stage (Upper Ordovician, Katian) of the Lelle core, Central Estonia.  Estonian Journal of Earth Sciences   56,   3,   131-142.
Rõõmusoks, A. 1964. Some brachiopods from the Ordovician of Estonia.  Tartu Riikliku Ülikooli Toimetised   153,   II,   3-28.
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Klassificering
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Rhynchonelliformea | 
| Class | Rhynchonellata | 
| Order | Orthida | 
| Suborder | Orthidina | 
| Superfamily | Orthoidea | 
| Family | Glyptorthidae | 
| Genus | Glyptorthis | 
| Species | alata | 
| irrupta | |
| plana | |
| squamata | 
References based on distribution
- Rõõmusoks, 1964 Mõnuste quarry, Harjumaa Vormsi Stage