Castrella (Castrella) bardeaui (Steinböck, 1926) Riedel, 1932 accepted as Fulinskiella bardeaui (Steinböck, 1926) Gieysztor & Szynal, 1939 (additional source)
Dalyellia armigera (Schmidt, 1861) Graff, 1905 accepted as Microdalyellia armigera (Schmidt, 1862) Gieysztor, 1938 (additional source)
Dalyellia capreola Steinböck, 1948 accepted as Gieysztoria capreola (Steinböck, 1948) Luther, 1955 (original description)
Dalyellia cuspidata (Schmidt, 1861) Hofsten, 1907 accepted as Gieysztoria cuspidata (Schmidt, 1861) Ruebush & Hayes, 1939 (additional source)
Dalyellia infundibuliformis (Fuhrmann, 1894) Graff, 1905 accepted as Microdalyellia infundibuliformis (Fuhrmann, 1894) Gieysztor, 1939 accepted as Microdalyellia (Gieysztoria) infundibuliformis (Fuhrmann, 1894) Gieysztor, 1939 accepted as Gieysztoria infundibuliformis (Fuhrmann, 1894) Ruebush & Hayes, 1939 (additional source)
Dalyellia microphthalma (Vejdovsky, 1895) Graff, 1905 accepted as Microdalyellia microphthalma (Vejdovsky, 1895) Gieysztor, 1938 (additional source)
Dalyellia oligocentra Steinböck, 1948 accepted as Gieysztoria oligocentra (Steinböck, 1948) Luther, 1955 (original description)
Dalyellioidarum (basis of record)

Greenland for Fulinskiella bardeaui (Steinböck, 1926) Gieysztor & Szynal, 1939 
Greenland for Fulinskiella bardeaui (Steinböck, 1926) Gieysztor & Szynal, 1939 
Greenland for Fulinskiella bardeaui (Steinböck, 1926) Gieysztor & Szynal, 1939 
Greenland for Fulinskiella bardeaui (Steinböck, 1926) Gieysztor & Szynal, 1939 
Iceland for Bothromesostoma personatum (Schmidt, 1848) Braun, 1885 
Iceland for Castrada (Castrada) borealis Steinböck, 1931 
Iceland for Castrada (Castrada) ejde Steinböck, 1931 
Iceland for Castrada (Castrada) intermedia (Volz, 1898) Luther, 1904 
Iceland for Castrada (Castrada) lanceola (Braun, 1885) Luther, 1904 
Iceland for Castrada (Castrada) luteola Hofsten, 1907 
Iceland for Castrada (Castrada) luteola Hofsten, 1907 
Iceland for Castrada (Castrada) rhaetica Hofsten, 1911 
Iceland for Castrada (Castrada) stagnorum Luther, 1904 
Iceland for Castrada (Castrada) stagnorum Luther, 1904 
Iceland for Castrella (Castrella) truncata (Abildgaard, 1789) Sekera, 1906 
Iceland for Castrella (Castrella) truncata (Abildgaard, 1789) Sekera, 1906 
Iceland for Castrella (Castrella) truncata (Abildgaard, 1789) Sekera, 1906 
Iceland for Fulinskiella bardeaui (Steinböck, 1926) Gieysztor & Szynal, 1939 
Iceland for Fulinskiella bardeaui (Steinböck, 1926) Gieysztor & Szynal, 1939 
Iceland for Fulinskiella bardeaui (Steinböck, 1926) Gieysztor & Szynal, 1939 
Iceland for Fulinskiella bardeaui (Steinböck, 1926) Gieysztor & Szynal, 1939 
Iceland for Fulinskiella bardeaui (Steinböck, 1926) Gieysztor & Szynal, 1939 
Iceland for Geocentrophora sphyrocephala de Man, 1876 
Iceland for Gieysztoria cuspidata (Schmidt, 1861) Ruebush & Hayes, 1939 
Iceland for Gieysztoria foreli (Hofsten, 1911) Ruebush & Hayes, 1939 
Iceland for Gieysztoria infundibuliformis (Fuhrmann, 1894) Ruebush & Hayes, 1939 
Iceland for Macrostomum appendiculatum Fabricius, 1826 
Iceland for Opisthocystis goettei (Bresslau, 1906) Sekera, 1911 
Iceland for Otomesostoma auditivum (Forel & Du Plessis, 1874) Hofsten, 1907 
Iceland for Otomesostoma auditivum (Forel & Du Plessis, 1874) Hofsten, 1907 
Iceland for Otomesostoma auditivum (Forel & Du Plessis, 1874) Hofsten, 1907 
Iceland for Otomesostoma auditivum (Forel & Du Plessis, 1874) Hofsten, 1907 
Iceland for Phaenocora galiziana (Schmidt, 1858) Graff, 1909 
Iceland for Phaenocora unipunctata (Ørsted, 1843) Bendl, 1908 
Iceland for Rhynchomesostoma rostratum (Müller, 1774) Luther, 1904 
Iceland for Rhynchomesostoma rostratum (Müller, 1774) Luther, 1904 
Iceland for Sekerana stolci (Sekera, 1911) Strand, 1914 
Iceland for Stenostomum ignavum Vejdovsky, 1880 
Iceland for Stenostomum leucops (Duges, 1828) Schmidt, 1848 
Iceland for Strongylostoma elongatum Hofsten, 1907 
Iceland for Strongylostoma elongatum elongatum Hofsten, 1907 
Iceland for Strongylostoma simplex Meixner, 1915 
South Iceland for Bothromesostoma personatum (Schmidt, 1848) Braun, 1885 
South Iceland for Castrada (Castrada) affinis Hofsten, 1907 
South Iceland for Castrada (Castrada) inermis Hofsten, 1911 
South Iceland for Castrada (Castrada) inermis Hofsten, 1911 
South Iceland for Castrada (Castrada) luteola Hofsten, 1907 
South Iceland for Castrada (Castrada) ophiocephala Steinböck, 1931 
South Iceland for Castrada (Castrada) stagnorum Luther, 1904 
South Iceland for Castrada (Castrada) stagnorum Luther, 1904 
South Iceland for Castrada (Castrada) viridis Volz, 1898 
South Iceland for Castrella (Castrella) truncata (Abildgaard, 1789) Sekera, 1906 
South Iceland for Geocentrophora baltica (Kennel, 1883) 
South Iceland for Gieysztoria capreola (Steinböck, 1948) Luther, 1955 
South Iceland for Gieysztoria cuspidata (Schmidt, 1861) Ruebush & Hayes, 1939 
South Iceland for Gieysztoria oligocentra (Steinböck, 1948) Luther, 1955 
South Iceland for Macrostomum appendiculatum Fabricius, 1826 
South Iceland for Microdalyellia armigera (Schmidt, 1862) Gieysztor, 1938 
South Iceland for Otomesostoma auditivum (Forel & Du Plessis, 1874) Hofsten, 1907 
South Iceland for Otomesostoma auditivum (Forel & Du Plessis, 1874) Hofsten, 1907 
South Iceland for Otomesostoma auditivum (Forel & Du Plessis, 1874) Hofsten, 1907 
South Iceland for Stenostomum leucops (Duges, 1828) Schmidt, 1848