Traits name details
original description
Yu, X.-H. (1987). New material of fresh-water genus <em>Nippononaia</em> (Bivalvia) from western Liaoning, China. In: Yu, X.-H.; Wang, W.-L.; Liu, X.-T.; Zhang, W.; Zheng, S.-L.; Zhang, Z.-C.; Yu, J.-S.; Ma, F.-Z.; Dong, G.-Y.; Yao, P.-Y. (eds) Mesozoic Stratigraphy and Palaeontology of Western Liaoning, Vol. 3. Geological Publishing House, Beijing, pp. 117-133. page(s): 123, pl. 1, figs 3, 4 [details] Available for editors 
original description
Yu, J.-S.; Dong, G.-Y.; Yao, P.-Y. (1987). The distribution and age of bivalves of the Jehol Group, westem Liaoning. In: Yu, X.-H.; Wang, W.-L.; Liu, X.-T.; Zhang, W.; Zheng, S.-L.; Zhang, Z.-C.; Yu, J.-S.; Ma, F.-Z.; Dong, G.-Y.; Yao, P.-Y. (eds) Mesozoic Stratigraphy and Palaeontology of Western Liaoning, Vol. 3. Geological Publishing House, Beijing. pp. 1-28. page(s): 13, pl. 3, fig. 4 [details] Available for editors 
additional source
Jiang, B.-Y.; Sha, J.-G.; Cai, H.-W. (2007). Early Cretaceous nonmarine bivalve assemblages from the Jehol Group in western Liaoning, northeast China. <em>Cretaceous Research.</em> 28(2): 199-214., available online at https://doi.org/10.1016/j.cretres.2006.05.013 page(s): 209 [details] Available for editors 
source of synonymy
Sha, J. (2007). Cretaceous trigonioidid (non-marine Bivalvia) assemblages and biostratigraphy in Asia with special remarks on the classification of Trigonioidacea. <em>Journal of Asian Earth Sciences.</em> 29(1): 62-83., available online at https://doi.org/10.1016/j.jseaes.2006.01.003 page(s): 80 [details] Available for editors 
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