Traits name details
original description
(of Trigonioides (Trigonioides) helongjiangensis J.-G. Sha & Z.-W. Gu, 1984 †) Gu, Z.-W.; Chen, J.-H.; Sha, J.-G. (1984). Preliminary study on Jurassic and Cretaceous bivalves of eastern Heilongjiang Province in China. In: Research team on the Mesozoic coal-bearing formation in eastern Heilongjiang (Ed.) Fossils from the Middle-Upper Jurassic and Lower Cretaceous in eastern Heilongjiang province, China. Part II. Heilongjiang Sciences & Technology Publishing House, Harbin, pp. 49-220. page(s): 150-151, pl. 32, figs 7, 8, pl. 33, figs 2-10, pl. 34, figs 1-3 [details] Available for editors 
basis of record
Sha, J. (2010). Historical distribution patterns of trigonioidids (non-marine Cretaceous bivalves) in Asia and their palaeogeographic significance. <em>Proceedings of the Royal Society B: Biological Sciences.</em> 277(1679): 277-283., available online at https://doi.org/10.1098/rspb.2009.0936 page(s): 278, 279, fig. 1c, d [details] Available for editors 
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