Subfamily
Isorthinae Schuchert et Cooper, 1931
Selection of related publications
Rubel, M. 2011. Silurian brachiopods Dictyonellida, Strophomenida, Productida, Orthotetida, Protorthida and Orthida from Estonia.  Fossilia Baltica 4, pp. 1-133.   Tartu Ülikooli geoloogia instituut. 
Hints, L. 1975. Brahiopody Enteletacea ordovika Pribaltiki. pp. 1-119.  Eesti NSV Teaduste Akadeemia. 
Rubel, M. P. 1963. Silurian brachiopods Orthida of Estonia.  ENSV TA Geoloogia Instituudi Uurimused   XIII,      109-160.
Rubel, M. P. 1962. New species of brachiopods (Dalmanellidae) from the Llandoverian of Estonia.  ENSV TA Geoloogia Instituudi Uurimused   X,      173-186.
List of species
5. Isorthis ovalis (Paškevicius, 1962) | Kuressaare Stage
7. Isorthis slitensis Walmsley, 1965 | Wenlock
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Rhynchonelliformea | 
| Class | Rhynchonellata | 
| Order | Orthida | 
| Suborder | Dalmanellidina | 
| Superfamily | Dalmanelloidea | 
| Family | Dalmanellidae | 
| Subfamily | Dalmanellinae | 
| Isorthinae | |
| Genus | Isorthis | 
| Levenea | |
| Subfamily | Resserellinae | 
| Templeellinae | 
 See also