Species
Apatorthis tenuicosta (Eichwald, 1840)
Synonymy list
1840     Spirifer tenuicosta m. — Eichwald , pp. 167-168
1840     Spirifer tenuicosta m. — Eichwald , pp. 144-145
1856     Platystrophia tenuicostata — Eichwald , pp. 418
1857     Spirifer tenuicosta — Eichwald , pp. 85
1860     Platystrophia tenuicostata m. — Eichwald , pp. 804, fig. 34:22
1933     Apatorthis tenuicostata — Öpik , pp. 9, fig. 1:4-5/2
1953     Apatorthis tenuicostata (Eichwald) — Alichova , pp. 68-69, fig. 7:17
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
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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 | Apatorthis | 
| Species | inflata | 
| jugata | |
| punctata | |
| tenuicosta | |
| ultima | 
References based on distribution
- Öpik, 1933b Jõhvi Substage
- Eichwald, 1860a Põõsaspea Cliff