Genus
Productorthis Kozłowski, 1927
Selection of related publications
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.
List of species
1. Productorthis aculeata (Pander, 1830) | Volkhov Stage
2. Productorthis eminens (Pander, 1830) | Kunda Stage
3. Productorthis obtusa (Pander, 1830) | Volkhov Stage
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Rhynchonelliformea | 
| Class | Rhynchonellata | 
| Order | Orthida | 
| Suborder | Orthidina | 
| Superfamily | Orthoidea | 
| Family | Productorthidae | 
| Subfamily | Productorthinae | 
| Genus | Nicolella | 
| Panderina | |
| Productorthis | |
| Species | aculeata | 
| eminens | |
| obtusa | |
| parallela | 
 See also