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.
S. Z. Shen, 2000 - Early Permian Brachiopods of Gondwana affinity from the Dingjiazhai Formation of the Baoshan Block, western Yunnan, China - Rivista Italiana di Paleontologia e Stratigrafia (106), 263-282 (journal article, English)
A. W. Grabau, 1936 - Early Permian fossils of China, part 2, Fauna of the Maping Limestone of Kwangsi and Kweichos - Paleontologia Sinica, ser. B. (8), - (journal article, English)