Austrorhynchus elixus Marcus, 1954 accepted as Paraustrorhynchus elixus (Marcus, 1954) Karling & Schockaert, 1977 (original description)
Callioplana evelinae Marcus, 1954 (original description)
Haploposthia albiventer Marcus, 1954 accepted as Kuma albiventer (Marcus, 1954) (original description)
Macrostomum phocurum Marcus, 1954 (original description)
Mecynostomum daenum Marcus, 1954 accepted as Pseudactinoposthia daena (Marcus, 1954) (original description)
Minona tridens Marcus, 1954 accepted as Duplominona tridens (Marcus, 1954) (original description)
Nygulgus Marcus, 1954 (original description)
Nygulgus evelinae Marcus, 1954 (original description)
Oneppus lacus Marcus, 1954 (original description)
Otocelis dichona Marcus, 1954 accepted as Haplocelis dichona (Marcus, 1954) (original description)
Paraphanostoma etium Marcus, 1954 accepted as Childia etium (Marcus, 1954) (original description)
Plagiostomum remanei Marcus, 1954 (original description)
Pogaina Marcus, 1954 (original description)
Pogaina adriatica (Dörler, 1900) Marcus, 1954 (new combination reference)
Pogaina murmanica (Graff, 1905) Marcus, 1954 (new combination reference)
Pogaina natans (Ax, 1951) Marcus, 1954 (new combination reference)
Pogaina suecica (Luther, 1948) Marcus, 1954 (new combination reference)
Pogaina suslica (Marcus, 1951) Marcus, 1954 (new combination reference)
Pogaina tifa Marcus, 1954 (original description)
Pogaina ussuriensis (Nasonov, 1932) Marcus, 1954 (new combination reference)
Polycystis felis Marcus, 1954 accepted as Paulodora felis (Marcus, 1954) Artois & Schockaert, 1998 (original description)
Polycystis matarazzoi (Marcus, 1948) Marcus, 1954 accepted as Paulodora matarazzoi Marcus, 1948 (new combination reference)
Utsurus Marcus, 1954 accepted as Reinhardorhynchus Diez, Monnens & Artois, 2021 (original description)
Utsurus evelinae Marcus, 1954 accepted as Reinhardorhynchus evelinae (Marcus, 1954) Diez, Monnens & Artois, 2021 (original description)
Vannuccia talea Marcus, 1954 (original description)
Zuccaria fredelyna Marcus, 1948 accepted as Paulodora fredelyna (Marcus, 1948) Artois & Schockaert, 1998 (additional source)

Brazil for Austrorhynchus elixus Marcus, 1954 
Brazil for Childia etium (Marcus, 1954) 
Brazil for Haploposthia albiventer Marcus, 1954 
Brazil for Macrostomum phocurum Marcus, 1954 
Brazil for Mecynostomum daenum Marcus, 1954 
Brazil for Minona tridens Marcus, 1954 
Brazil for Nygulgus evelinae Marcus, 1954 
Brazil for Oneppus lacus Marcus, 1954 
Brazil for Otocelis dichona Marcus, 1954 
Brazil for Paulodora felis (Marcus, 1954) Artois & Schockaert, 1998 
Brazil for Plagiostomum remanei Marcus, 1954 
Brazil for Pogaina tifa Marcus, 1954 
Brazil for Polycystis felis Marcus, 1954 
Brazil for Polycystis felis Marcus, 1954 
Brazil for Pseudaphanostoma divae Marcus, 1952 
Brazil for Utsurus evelinae Marcus, 1954 
Brazil for Vannuccia talea Marcus, 1954