This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.
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G. A. Cooper, 1983 - The Terebratulacea (Brachiopoda) Triassic to Recent: a study of the brachidia (loops) - Smithsonian Contributions to Paleobiology (50), 1-290 (journal article, English)