Traits taxon details
original description
Williams, A. (1965). Superfamily Orthacea. pp. 307-328. In: R. C. Moore (ed.). <em>Treatise on invertebrate paleontology, Part H, Brachiopoda, Volume 1.</em> The Geological Society of America, Boulder, CO & University of Kansas Press, Lawrence, KS, 521 pp. [details]
basis of record
Hansen, J.; Holmer, L. E. (2011). Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen. <em>Zootaxa.</em> 3076(1): 1-122., available online at https://doi.org/10.11646/zootaxa.3076.1.1 [details] Available for editors
additional source
Treatise on Invertebrate Paleontology. (1997-2007). Part H revised, Brachiopoda. <em>Geological Society of America, Boulder; and University of Kansas Press, Lawrence,.</em> vol. 1-6. [details]
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