Acrorhynchides robustus (Karling, 1931) Strand, 1928 (additional source)
Anthopharynx sacculipenis Ehlers, 1972 (additional source)
Archiloa westbladi Ax, 1954 accepted as Archiloa rivularis de Beauchamp, 1910 (source of synonymy)
Axiutelga aculeata (Ax, 1959) Karling, 1980 (additional source)
Baicalellia brevituba (Luther, 1918) Nasonov, 1930 (additional source)
Balgetia semicirculifera Karling, 1962 (additional source)
Baltoplana magna Karling, 1949 (additional source)
Baltoplana valkanovi Ax, 1959 (additional source)
Beklemischeviella angustior Luther, 1943 (additional source)
Beklemischeviella contorta (Beklemischev, 1927) Luther, 1943 (additional source)
Brederveldia van der Velde & van de Winkel, 1975 (additional source)
Brederveldia bidentata Van Der Velde & Van De Winkel, 1975 (additional source)
Bresslauilla relicta Reisinger, 1929 (additional source)
Brinkmanniella macrostomoides Luther, 1948 (additional source)
Brunetia camarguensis (Brunet, 1965) Karling, 1980 (additional source)
Byrsophlebs dubia (Ax, 1956) Karling, 1985 (additional source)
Byrsophlebs simplex (Ax, 1959) Karling, 1985 (additional source)
Carcharodorhynchus subterraneus Meixner, 1938 (additional source)
Ceratopera falcata (Ax, 1953) Van Steenkiste & Leander, 2018 (additional source)
Ceratopera falcata falcata (Ax, 1953) Van Steenkiste & Leander, 2018 (additional source)
Cheliplana euxeinos Ax, 1959 (additional source)
Cheliplana stylifera Karling, 1949 (additional source)
Cheliplana vestibularis de Beauchamp, 1927 (additional source)
Cicerina brevicirrus Meixner, 1928 (additional source)
Cicerina eucentrota Ax, 1959 (additional source)
Cicerina tetradactyla Giard, 1904 (additional source)
Clyporhynchus monolentis Karling, 1947 (additional source)
Coelogynopora bresslaui Steinböck, 1924 accepted as Coelogynopora sequana Sopott-Ehlers, 1992 (source of synonymy)
Coronhelmis inornatus Ehlers, 1974 (additional source)
Coronhelmis multispinosus Luther, 1948 (additional source)
Coronhelmis tripartitus Ehlers, 1974 (additional source)
Coronopharynx pusillus Luther, 1962 accepted as Baicalellia pusilla (Luther, 1962) Stephenson, Van Steenkiste & Leander, 2019 (additional source)
Cystiplana paradoxa Karling, 1964 (additional source)
Diascorhynchus caligatus Ax, 1959 (additional source)
Diascorhynchus lappvikensis Karling, 1963 (additional source)
Diascorhynchus serpens Karling, 1949 (additional source)
Djeziraia euxinica (Mack-Fira, 1971) Schockaert, 1982 (additional source)
Gieysztoria maritima Luther, 1955 (status source)
Gnathorhynchus conocaudatus Meixner, 1929 (additional source)
Gnathorhynchus krogeni Karling, 1947 (status source)
Gyratrix hermaphroditus Ehrenberg, 1831 (additional source)
Haloplanella obtusituba Luther, 1946 (additional source)
Haplovejdovskya subterranea Ax, 1954 (additional source)
Hartogia pontica Mack-Fira, 1968 (additional source)
Itaipusa karlingi Mack-Fira, 1968 (additional source)
Itaipusa scotica (Karling, 1954) Karling, 1978 accepted as Reinhardorhynchus scoticus (Karling, 1954) Diez, Monnens & Artois, 2021 (additional source)
Lutheriella diplostyla Hartog, 1966 (additional source)
Macrostomum parthenopeum Beklemischev, 1951 accepted as Macrostomum rubrocinctum Ax, 1951 (source of synonymy)
Maehrenthalia americana Ax & Armonies, 1990 (additional source)
Messoplana falcata (Ax, 1953) Den Hartog, 1966 accepted as Ceratopera falcata (Ax, 1953) Van Steenkiste & Leander, 2018 (additional source)
Messoplana falcata falcata (Ax, 1953) Den Hartog, 1966 accepted as Ceratopera falcata falcata (Ax, 1953) Van Steenkiste & Leander, 2018 (additional source)
Neognathorhynchus lobatus (Ax, 1952) Karling, 1956 (additional source)
Odontorhynchus lonchiferus Karling, 1947 (additional source)
Paracicerina maristoi Karling, 1952 (additional source)
Paramesostoma neapolitanum (Graff, 1882) Attems, 1896 (additional source)
Parautelga bilioi Karling, 1964 (additional source)
Phonorhynchus bitubatus Meixner, 1938 (additional source)
Phonorhynchus pernix Ax, 1959 (additional source)
Placorhynchus dimorphis Karling, 1947 (additional source)
Placorhynchus echinulatus Karling, 1947 (additional source)
Placorhynchus octaculeatus Karling, 1931 (additional source)
Placorhynchus tetraculeatus Armonies & Hellwig, 1987 (additional source)
Pogaina kinnei Ax, 1970 (additional source)
Polycystis naegelii Kölliker, 1845 (additional source)
Pontaralia relicta (Beklemischev, 1927) Mack-Fira, 1968 (additional source)
Prognathorhynchus campylostylus Karling, 1947 (additional source)
Progyrator mamertinus (Graff, 1874) Reisinger, 1926 (additional source)
Promesostoma balticum Luther, 1918 (additional source)
Promesostoma bilineatum Pereyaslawzewa, 1892 (additional source)
Promesostoma cochleare Karling, 1935 (additional source)
Promesostoma ensifer (Uljanin, 1870) Pereyaslawzewa, 1892 (additional source)
Promesostoma gallicum Ax, 1956 (additional source)
Promesostoma minutum Ax, 1956 (additional source)
Promesostoma nynaesiense Karling, 1957 (additional source)
Promesostoma rostratum Ax, 1951 (additional source)
Proschizorhynchella helgolandica (Karling & L'Hardy, 1965) Schilke, 1970 (additional source)
Proschizorhynchus arenarius (de Beauchamp, 1927) Schilke, 1970 (additional source)
Proschizorhynchus gullmarensis Karling, 1950 (additional source)
Proschizorhynchus tricingulatus Ax, 1959 (additional source)
Provortex affinis (Jensen, 1878) Graff, 1882 (additional source)
Provortex balticus (Schultze, 1851) Graff, 1882 (taxonomy source)
Provortex karlingi Ax, 1951 (additional source)
Provortex pallidus Luther, 1948 (additional source)
Provortex psammophilus Ax, 1951 (additional source)
Provortex tubiferus Luther, 1948 (additional source)
Proxenetes Jensen, 1878 (status source)
Proxenetes britannicus Den Hartog, 1966 (additional source)
Proxenetes cimbricus Ax, 1971 (additional source)
Proxenetes cisorius Den Hartog, 1966 (additional source)
Proxenetes deltoides Den Hartog, 1965 (additional source)
Proxenetes flabellifer Jensen, 1878 (additional source)
Proxenetes karlingi Luther, 1943 (additional source)
Proxenetes minimus Den Hartog, 1966 (additional source)
Proxenetes pratensis Ax, 1960 (additional source)
Proxenetes puccinellicola Ax, 1960 (additional source)
Proxenetes simplex Luther, 1948 (additional source)
Proxenetes unidentatus Den Hartog, 1965 (additional source)
Pseudograffilla arenicola Meixner, 1938 (additional source)
Pseudograffilla hymanae Mack-Fira, 1974 (status source)
Ptychopera avicularis Karling, 1974 (additional source)