original description(ofTrigonia (Kumatrigonia) qiaotouensis Y.-J. Lu, 1981 †)Lu, Y.-J. (1981). Late Triassic lamellibranchs from Datong of Qinghai, NW China. <em>Acta Palaeontologica Sinica.</em> 20: 577-585. page(s): 579, pl. 1, figs 31, 32 [details] Available for editors
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