Traits taxon details
original description
Say T. (1818). Account of two new genera, and several new species, of fresh water and land snails. <em>Journal of the Academy of Natural Sciences of Philadelphia.</em> 1: 276-284., available online at http://biodiversitylibrary.org/page/24680546 page(s): 278 [details]
additional source
Emberton, K. C. (1995). When shells do not tell: 145 million years of evolution in North America's polygyrid land snails, with a revision and conservation priorities. <em>Malacologia.</em> 37(1): 69-110. Ann Arbor., available online at https://www.biodiversitylibrary.org/page/13113494 page(s): 89 [details]
additional source
Rhoads, S. N. (1899). Annotated list of land and fresh-water shells recently collected in the vicinity of Miami, Florida. <em>The Nautilus.</em> 13(4): 43-48., available online at https://www.biodiversitylibrary.org/page/42799943 page(s): 44 [details]
additional source
Lee, H. G. (2010). Gettleman key to probe of major reversals. <em>American Conchologist.</em> 38(4): 6-11., available online at https://conchologistsofamerica.org/wp-content/uploads/2019/01/38-dec-2010.pdf page(s): 9, 11, fig. 11 [details]
additional source
Pilsbry, H. A. (1938). The type of <i>Polygyra</i> Say. <em>The Nautilus.</em> 52(1): 22-24., available online at https://www.biodiversitylibrary.org/page/8284522 [details]
additional source
Webb, G. R. (1964). Freezing versus <i>Polygyra septemvolva</i> Say. <em>The Nautilus.</em> 78(1): 31., available online at https://www.biodiversitylibrary.org/page/8521326 [details]
additional source
Dundee, D. S. & Hermann, P. W. (1965). Malacological problems: 1. <em>The Nautilus.</em> 78(3): 81-83., available online at https://www.biodiversitylibrary.org/page/8521384 [details]
additional source
Beck, H. (1837-1838). <i>Index molluscorum praesentis aevi musei principis augustissimi Christiani Frederici</i>. 124 pp. Hafniae [Copenhagen]. Pp. 1-100 [1837]; 101-124 [1838]; Appendix: 1-8 [June 1837]. , available online at https://biodiversitylibrary.org/page/32058074 page(s): 23 [details]
|