Traits taxon details
original description
Soot-Ryen, H.; Soot-Ryen, T. (1960). The Middle Ordovician of the Oslo Region, Norway. 11. Pelecypoda. <em>Norsk Geologisk Tidsskrift.</em> 40: 81-122. page(s): 110-111, pl. 4, figs 47-52 [details] Available for editors 
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