Traits taxon details
original description
Ebbestad, J. O. R.; Yochelson, E. L. (2000). Isostrophic molluscs (Tergomya and Gastropoda) from the Upper Ordovician of Norway. <em>Norsk Geologisk Tidsskrift.</em> 80(3): 187-202., available online at https://doi.org/10.1080/002919600433733 page(s): 189, fig. 3A-H [details] Available for editors 
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