original description(ofNippononaia (Eonippononaia) elliptica F.-X. Guo & Y.-F. Zhang, 1987 †)Guo, F.-X. (1987). New data of Lower Cretaceous bivalves of the Jingxing Formation from West Yunnan. <em>Professional Papers of Stratigraphy and Palaeontology.</em> 18: 147-161. page(s): 153, pl. 1, fig. 8 [details] Available for editors