| Stenostomum leucops (Duges, 1828) | Jul 1-Aug2, 1937 | | | frequent. |
| Stenostomum ignavum Vejdovsky, 1880 | Jul 1-Aug2, 1937 | | | in a pond, 1 specimen. |
| Macrostomum appendiculatum Fabricius, 1826 | Jul 1-Aug2, 1937 | | | pond covered with Menyanthes, many specimens. |
| Gieysztoria infundibuliformis (Fuhrmann, 1894) | Jul 1-Aug2, 1937 | | | pool near Skutustaoir, 2 specimens. |
| Castrella (Castrella) truncata (Abildgaard, 1789) | Jul 1-Aug2, 1937 | | | pool in vicinity of Skutustaoir, very numerous. |
| Strongylostoma elongatum Hofsten N, 1907 | Jul 1-Aug2, 1937 | | | pool near Skutustaoir |
| Castrada (Castrada) stagnorum Luther, 1904 | Jul 1-Aug2, 1937 | | | pools and ponds near Myvatn (Skutustaoier), singly to numerous. |
| Castrada (Castrada) lanceola (Braun, 1885) | Jul 1-Aug 2, 1937 | | | In pools near Skutustaoir (Myvatn). |
| Castrada (Castrada) ejde Steinböck, 1931 | Jul 1-Aug 2, 1937 | | | Pond near Skutustaoir, 1 specimen. |
| Castrada (Castrada) intermedia (Volz, 1898) | Jul 1-Aug 2, 1937 | | | Pond near Skutustaoir, a few specimens. |
| Phaenocora unipunctata (Ørsted, 1843) | Jul 1-Aug 2, 1937 | | | pool near Skutustaoir (Myvatn), several specimens. |
| Rhynchomesostoma rostratum (Müller, 1774) | Jul 1-Aug 2, 1937 | | | in a bog pool north of Laugarvatn, many specimens. |
| Phaenocora galiziana (Schmidt, 1858) | Jul 1-Aug 2, 1937 | | | pond near Skutustaoir (Myvatn). |
| Opisthocystis goettei (Bresslau, 1906) | Jul 1-Aug 2, 1937 | | | pond near Skutustaoir, several specimens. |
| Sekerana stolzi (Sekera, 1912) | Jul 1-Aug 2, 1937 | | | pond near Skutustaoir (Myvatn), three specimens. |
| Otomesostoma auditivum (Forel & du Plessis, 1874) | Jul 1-Aug 2, 1937 | | | pool and pond, very frequent. |