Traits taxon details
original description
(of Polygyra martini G. D. Hanna, 1920 †) Hanna, G.D. (1920). Miocene Land Shells from Oregon. <em>The University of Kansas Science Bulletin.</em> 13(1): 3-12., available online at https://www.biodiversitylibrary.org/page/4397878 page(s): 8-9, pl. 1, figs 10-12 [details]
basis of record
Roth, B.; Emberton, K. C. (1994). "Extralimital" Land Mollusks (Gastropoda) from the Deep River Formation, Montana: Evidence for Mesic Medial Tertiary Climate. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 145: 93-106. page(s): 103 [details] Available for editors 
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