Traits taxon details
original description
(of ) Isakar, M. (1991). Harjuan (Upper Ordovician) new Bivalves and a new Gastropod from North Estonia. <em>Acta et Commentationes Universitatis Tartuensis.</em> 12: 43-55. page(s): 49-50, 54, pl. 4, 5 [details] Available for editors 
additional source
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): 192, fig. 5A-I [details] Available for editors 
|