original description
Kobayashi, T. (1963). On the Cretaceous Ban Na Yo Fauna of East Thailand with a Note on the Distribution of <em>Nippononaia</em>, <em>Trigonioides</em> and <em>Plicatounio</em>. <em>Japanese Journal of Geology and Geography.</em> 34(1): 35-43.
page(s): 41-42, pl. 3, figs 9, 10 [details] Available for editors
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From editor or global species database
Type locality Ban Na Yo, Amphoe Mukdahan, Changwat Nakhon Phamon on the Khorat Plateau, Thailand, near the Mekong River [details]