Genus
Apatorthis Öpik, 1933
Selection of related publications
Öpik, A. 1933. Über einige Dalmanellacea aus Estland.  Tartu Ülikooli Geoloogia Instituudi Toimetused   32,      1-25.
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
List of species
2. Apatorthis jugata Öpik, 1933 | Lasnamägi Stage
5. Apatorthis ultima Öpik, 1933 | Pirgu Stage
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Rhynchonelliformea | 
| Class | Rhynchonellata | 
| Order | Orthida | 
| Suborder | Dalmanellidina | 
| Superfamily | Dalmanelloidea | 
| Family | Angusticardiniidae | 
| Genus | Angusticardinia | 
| Apatorthis | |
| Species | inflata | 
| jugata | |
| punctata | |
| tenuicosta | |
| ultima | 
 See also