Traits taxon details
original description
Ulrich, E. O.; Cooper, G. A. (1936). New genera and species of Ozarkian and Canadian brachiopods. <em>Journal of Paleontology.</em> 10: 616-631. [details] Available for editors 
taxonomy source
Popov, L. E.; Pour, M. G.; Bassett, M. G.; Kebria-ee, M. (2009). Billengsellide and orthide brachiopods: new insights into earliest Ordovician evolution and biogeography from northern Iran. <em>Palaeontology.</em> 52(1): 35-52. note: Allocates Family to Superfamily Polytoechioidea. [details]
additional source
Popov, L.; Vinn, O.; Nikitina, O. (2001). Brachiopods of the redefined family Tritoechiidae from the Ordovician of Kazakhstan and South Urals. <em>Geobios.</em> 34(2): 131-155., available online at https://doi.org/10.1016/s0016-6995(01)80057-7 note: Provides revised diagnosis for Family and lists assigned genera. [details]
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