Traits taxon details
original description
North, F. J. (1920). On Syringothyris Winchell and certain Carboniferous Brachiopoda referred to Spiriferina d'Orbigny. <em>The Quarterly journal of the Geological Society of London.</em> 76(2): 162-227. [details]
additional source
Oleneva, N. V. (2016). Devonian brachiopods of the orders Spiriferida and Spiriferinida of the European Russia and Transcaucasia: Systematics, shell microstructure, and microornament. <em>Paleontological Journal.</em> 50(11): 1207-1296. [details]
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