Cirrifera aculeata (Ax, 1951) (additional source)
Coelogynopora aculeata Ax, 1951 accepted as Cirrifera aculeata (Ax, 1951) (original description)
Coronhelmis lutheri Ax, 1951 (original description)
Halammovortex macropharynx (Meixner, 1938) Karling, 1943 (additional source)
Kataplana germanica (Meixner in Ax, 1951) (original description)
Macrostomum pusillum Ax, 1951 (original description)
Macrostomum rubrocinctum Ax, 1951 (original description)
Monocelopsis Ax, 1951 (original description)
Monocelopsis otoplanoides Ax, 1951 (original description)
Otoplana schulzi Ax, 1951 accepted as Otoplanella schulzi (Ax, 1951) (original description)
Otoplana subterranea Ax, 1951 accepted as Pseudosyrtis subterranea (Ax, 1951) (original description)
Philosyrtis germanica Meixner, 1938 accepted as Kataplana germanica (Meixner in Ax, 1951) (source of synonymy)
Phonorhynchus bitubatus Meixner, 1938 (additional source)
Polycystis robusta (Karling, 1931) Meixner, 1938 accepted as Acrorhynchides robustus (Karling, 1931) Strand, 1928 (additional source)
Prognathorhynchus anophthalmus Meixner (original description)
Promesostoma bilineatum Pereyaslawzewa, 1892 (additional source)
Promesostoma excellens Meixner, 1938 (additional source)
Promesostoma gracilis Ax, 1951 accepted as Promesostoma gracile Ax, 1951 (original description)
Promesostoma hamiferum Meixner, 1938 (additional source)
Promesostoma lugubre Meixner, 1938 (additional source)
Promesostoma meixneri Ax, 1951 (original description)
Promesostoma rostratum Ax, 1951 (original description)
Promonotus schultzei Meixner, 1943 (additional source)
Provortex karlingi Ax, 1951 (original description)
Provortex psammophilus Ax, 1951 (original description)
Proxenetes angustus Ax, 1951 accepted as Proxenetes simplex Luther, 1948 (original description)
Ptyalorhynchus Ax, 1951 (original description)
Ptyalorhynchus coecus Ax, 1951 (original description)
Schizorhynchoides rarus Ax, 1951 (original description)
Vejdovskya ignava Ax, 1951 (original description)
Vejdovskya natans Ax, 1951 accepted as Pogaina natans (Ax, 1951) Marcus, 1954 (original description)

Germany for Baltoplana magna Karling, 1949 
Germany for Beklemischeviella contorta (Beklemischev, 1927) Luther, 1943 
Germany for Beklemischeviella contorta (Beklemischev, 1927) Luther, 1943 
Germany for Beklemischeviella contorta (Beklemischev, 1927) Luther, 1943 
Germany for Beklemischeviella contorta (Beklemischev, 1927) Luther, 1943 
Germany for Bresslauilla relicta Reisinger, 1929 
Germany for Bresslauilla relicta Reisinger, 1929 
Germany for Brinkmanniella macrostomoides Luther, 1948 
Germany for Coronhelmis lutheri Ax, 1951 
Germany for Coronhelmis multispinosus Luther, 1948 
Germany for Coronhelmis multispinosus Luther, 1948 
Germany for Coronhelmis multispinosus Luther, 1948 
Germany for Dolichomacrostomum uniporum Luther, 1947 
Germany for Dolichomacrostomum uniporum Luther, 1947 
Germany for Dolichomacrostomum uniporum Luther, 1947 
Germany for Dolichomacrostomum uniporum Luther, 1947 
Germany for Dolichomacrostomum uniporum Luther, 1947 
Germany for Dolichomacrostomum uniporum Luther, 1947 
Germany for Haloplanella minuta Luther, 1946 
Germany for Itaspiella armata Ax, 1951 
Germany for Jensenia angulata (Jensen, 1878) Graff, 1882 
Germany for Macrostomum rubrocinctum Ax, 1951 
Germany for Notocaryoplanella glandulosa (Ax, 1951) 
Germany for Otoplanella schulzi (Ax, 1951) 
Germany for Paramonotus hamatus (Jensen, 1878) Meixner, 1938 
Germany for Paramonotus hamatus (Jensen, 1878) Meixner, 1938 
Germany for Paromalostomum dubium (de Beauchamp, 1927) 
Germany for Paromalostomum dubium (de Beauchamp, 1927) 
Germany for Prognathorhynchus canaliculatus Karling, 1947 
Germany for Promesostoma cochleare Karling, 1935 
Germany for Promesostoma marmoratum (Schultze, 1851) Graff, 1882 
Germany for Promesostoma marmoratum (Schultze, 1851) Graff, 1882 
Germany for Proschizorhynchus gullmarensis Karling, 1950 
Germany for Provortex affinis (Jensen, 1878) Graff, 1882 
Germany for Provortex balticus (Schultze, 1851) Graff, 1882 
Germany for Provortex karlingi Ax, 1951 
Germany for Provortex karlingi Ax, 1951 
Germany for Provortex tubiferus Luther, 1948 
Germany for Proxenetes angustus Ax, 1951 
Germany for Proxenetes angustus Ax, 1951 
Germany for Proxenetes angustus Ax, 1951 
Germany for Proxenetes flabellifer Jensen, 1878 
Germany for Proxenetes simplex Luther, 1948 
Germany for Pseudograffilla arenicola Meixner, 1938 
Germany for Schizorhynchoides rarus Ax, 1951 
Germany for Thalassoplanella collaris Luther, 1946 
Germany for Thalassoplanella collaris Luther, 1946 
Germany for Tvaerminnea karlingi Luther, 1943 
Germany for Tvaerminnea karlingi Luther, 1943 
Germany for Vejdovskya ignava Ax, 1951 
Lithuanian Exclusive Economic Zone for Cicerina brevicirrus Meixner, 1928 
North Sea for Archimonotresis limophila Meixner, 1938 
North Sea for Proschizorhynchus gullmarensis Karling, 1950 
North Sea for Vejdovskya ignava Ax, 1951 
Poland for Beklemischeviella contorta (Beklemischev, 1927) Luther, 1943 
Polish Exclusive Economic Zone for Cheliplanilla caudata Meixner, 1938 
Polish Exclusive Economic Zone for Cicerina brevicirrus Meixner, 1928 
Polish Exclusive Economic Zone for Coelogynopora biarmata Steinböck, 1924 
Polish Exclusive Economic Zone for Macrostomum hamatum Luther, 1947 
Polish Exclusive Economic Zone for Proschizorhynchus gullmarensis Karling, 1950 
Russia for Cheliplanilla caudata Meixner, 1938 
Russia for Cicerina brevicirrus Meixner, 1928 
Russia for Proschizorhynchus gullmarensis Karling, 1950 
Turkey for Macrostomum pusillum Ax, 1951