Traits taxon details
original description
(of Planorbis spectabilis Meek, 1860 †) Meek, F.B. (1860). Descriptions of new fossil remains collected in Nebraska and Utah, by the exploring expeditions under the command of Captain J. H. Simpson, of U. S. Topographical Engineers, [extracted from that officer's forthcoming report]. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 12: 308-315., available online at https://www.biodiversitylibrary.org/page/26297455 page(s): 314 [details]
basis of record
Pierce, H.G. (1993). The nonmarine mollusks of the Late Oligocene-Early Miocene Cabbage Patch fauna of western Montana III. Aquatic mollusks and conclusions. <em>Journal of Paleontology.</em> 67(6): 980-993. page(s): 984 [details] Available for editors 
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