Traits taxon details
original description
(of Bellerophon contortus Eichwald, 1856 †) Eichwald, E. (1856). Beitrag zur geographischen Verbreitung der fossil Thiere Russlands. <em>Bulletin de la Société Impériale des naturalistes de Moscou Geol.</em> 29: 91-96, 448-466, 555-608., available online at https://books.google.be/books?id=FWkTw4BAzR8C&ots=RJ1rE8WpDg&dq=Eichwald%2C%20E.%091856%09Beitrag%20zur%20geographischen%20Verbreitung%20der%20fossil%20Thiere%20Russlands.%20&lr&pg=PP3#v=onepage&q&f=false page(s): 587 [details]
basis of record
Ebbestad, J. O. R. (1999). Bucaniid gastropods from the upper Ordovician of Baltica, with a discussion of the Bucaniinae. <em>Palaeontology.</em> 42(1): 149-169., available online at https://doi.org/10.1111/1475-4983.00066 page(s): 157 [details] Available for editors 
additional source
Koken, E. (1925). Die Gastropoden des baltischen Untersilurs [fortgesetzt von Jar. Perner]. <em>Zapiski Rossiskoi Akademii Nauk. ser. 8, Otdel Fiziko-Mathematicheskikh Nauk [= Mémoires de l'Académie des Sciences de Russie, ser. 8, Classe Physico-mathématique].</em> 37(1): 1-326, 41 pls., available online at https://www.digar.ee/viewer/et/nlib-digar:330244/290873/page/3 page(s): 67, fig. 25 (4, 5, 11) [details] Available for editors 
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