Traits name details
original description
Kikuchi, N.; Tashiro, M. (1999). <em>Trigonioides</em> (Cretaceous non-marine bivalves) from the Goshoura Group in Kyushu. <em>Memoirs of Faculty of Science, Kochi University, Series E, Geology.</em> 19: 23-31. page(s): 26-27, pl. 1, figs 5-11, textfig. 3 [details] Available for editors 
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