| Anguispira kochi f. aperta Pilsbry, 1948
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Pilsbry, H. A. (1948). Land Mollusca of North America (north of Mexico). Volume II Part 2. The Academy of Natural Sciences of Philadelphia Monographs, 3: i–xlvii, 521–1113. Philadelphia [19 March]. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=296810 | 
                
                
                
                
            
                
                    | Anguispira kochi eyerdami Clench & Banks, 1939
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Clench, W. J., & Banks, G. (1939). A new subspecies of Anguispira kochi from Washington. Memorias De La Sociedad Cubana De Historia Natural “Felipe Poey”, 13(5): 285, pl. 36. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=349627 | 
                
                
                
                
            
                
                    | Pyramidula solitaria var. strontiana G.H.Clapp, 1916
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Clapp, G. H. (1916). Notes on the land-shells of the islands at the western end of Lake Erie and descriptions of new varieties. Annals of the Carnegie Museum, 10: 532–540, plate 32. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=350031 | 
                
                
                
                
            
                
                    | Pyramidula solitaria var. roseoapicata G.H.Clapp, 1916
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Clapp, G. H. (1916). Notes on the land-shells of the islands at the western end of Lake Erie and descriptions of new varieties. Annals of the Carnegie Museum, 10: 532–540, plate 32. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=350031 | 
                
                
                
                
            
                
                    | Pyramidula solitaria var. mynesites G.H.Clapp, 1916
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Clapp, G. H. (1916). Notes on the land-shells of the islands at the western end of Lake Erie and descriptions of new varieties. Annals of the Carnegie Museum, 10: 532–540, plate 32. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=350031 | 
                
                
                
                
            
                
                    | Pyramidula solitaria mousensis Goodrich, 1916
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Goodrich, C. (1916). A trip to islands in Lake Erie. Annals of the Carnegie Museum, 10(3–4): 527–531. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=350033 | 
                
                
                
                
            
                
                    | Pyramidula solitaria var. albina B.Walker, 1906
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Walker, B. (1906). An illustrated catalogue of the Mollusca of Michigan. Part 1. Terrestrial Pulmonata (land snails). Report for 1905, State Board of Geological Survey, 1905: 432–537. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=349570 | 
                
                
                
                
            
                
                    | Helix kochi L.Pfeiffer, 1846
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Pfeiffer, L. (1846). Descriptions of thirty-six new species of Helix, belonging to the collection of H. Cuming, Esq. Proceedings of the Zoological Society of London, 13: 126–133 (“1845”). https://www.molluscabase.org/aphia.php?p=sourcedetails&id=289846 | 
                
                
                
                
            
                
                    | Patula solitaria (Say, 1821)
                        synoniem |  | 
                
                
                
                
            
                
                    | Helix solitaria Say, 1821
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Say, T. (1821). Description of univalve shells of the United States. Journal of the Academy of Natural Sciences of Philadelphia, 2(1): 149–179. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=291182 |