Brachiopoda
Family

Angusticardiniidae Schuchert et Cooper, 1931

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Aiheeseen liittyvät julkaisut
Rubel, M. P. 1961. Lower-Ordovician brachiopods of the superfamilies Orthacea, Dalmanellacea and Syntrophiacea of Eastern Baltic. ENSV TA Geoloogia Instituudi uurimused VI, 141-226.
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
3. Apatorthis inflata Öpik, 1933 | Keila StageOandu Stage
4. Apatorthis jugata Öpik, 1933 | Lasnamägi Stage
5. Apatorthis punctata Öpik, 1933 | Jõhvi SubstageKeila Stage
6. Apatorthis tenuicosta (Eichwald, 1840) | Jõhvi SubstageKeila Stage