Traits taxon details
original description
Schuchert, C.; Cooper, G. A. (1931). Synopsis of the brachiopod genera of the suborders Orthoidea and Pentameroidea, with notes on the Teleotremata. <em>American Journal of Science (series 5).</em> 22(129): 241-255. [details]
additional source
Geyer, G.; Mergl, M. (1997). Protorthacean Brachiopods from the Middle Cambrian of Morocco. <em>Journal of Paleontology.</em> 71(5): 791-812. [details]
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