Traits taxon 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 
original description
(of Trigonioides (Wakinoa) subtrigonus J.-G. Sha, 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): 148, pl. 32, figs 1-6 [details] Available for editors 
From editor or global species database
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