Genus
Plaesiomys Hall et Clarke, 1892
Selection of related publications
Kaljo, D., Hints, L., Männik, P., Nõlvak, J. 2008. The succession of Hirnantian events based on data from Baltica: brachiopods, chitinozoans, conodonts, and carbon isotopes.  Estonian Journal of Earth Sciences   57,   4,   197-218. DOI:10.3176/earth.2008.4.01
Hints, L. 1990. Ordovician articulate brachiopods.  Field Meeting Estonia 1990. An Excursion Guidebook, pp. 58-61.   Estonian Academy of Sciences. 
Oraspõld, A. L. 1959. Some representatives of the Superfamily Orthacea from the Upper Ordovician of Estonia.  Tartu Riikliku Ülikooli Toimetised   75,   I,   51-79.
List of species
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Klassificering
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Rhynchonelliformea | 
| Class | Rhynchonellata | 
| Order | Orthida | 
| Suborder | Orthidina | 
| Superfamily | Orthoidea | 
| Family | Plaesiomyidae | 
| Subfamily | Plaesiomyinae | 
| Genus | Dinorthis | 
| Madiorthis | |
| Multicostella | |
| Plaesiomys | |
| Species | anticostiensis | 
| saxbyana | |
| solaris | |
| subquadrata | 
 See also