| Gieysztoria | acariaia | Marcus, 1946 | |
| (Gieysztoria) | acariaia | Marcus, 1946 | |
| Plagiostomum | acoluthum | Marcus, 1948 | |
| Haploposthia | albiventer | Marcus, 1954 | |
| Kuma | albiventer | (Marcus, 1954) | |
| Polycystidinae | Alcha | Marcus, 1949 | |
| Notoplanides | alcha | Marcus & Marcus, 1968 | |
| Notoplanides | alcha | Marcus & Marcus, 1968 | |
| Stylochoplana | alcha | (Marcus & Marcus, 1968) | |
| Catenula | alitha | Marcus, 1945 | |
| Latocestinae | Alleena | Marcus, 1947 | |
| Latocestidae | Alleena | Marcus, 1947 | |
| Vorticeros | cyrtum | amoma | Marcus, 1947 |
| Stenostomum | amphotum | Marcus, 1945 | |
| Gnesiocerotidae | Amyris | Marcus & Marcus, 1968 | |
| Notoplanidae | Amyris | Marcus & Marcus, 1968 | |
| Anokkostenostomum | anatirostrum | (Marcus, 1945) | |
| Stenostomum | anatirostrum | Marcus, 1945 | |
| Notoplana | annula | Marcus & Marcus, 1968 | |
| Notoplana | annula | Marcus & Marcus, 1968 | |
| Monocelis | anta | Marcus, 1954 | |
| Faerlea | antora | Marcus, 1952 | |
| Dugesia | arndti | Marcus, 1946 | |
| Girardia | arndti | Marcus, 1946 | |
| Lenopharynginae | Artinga | Marcus, 1948 | |
| Cheliplana | asica | Marcus, 1952 | |
| Nematoplana | asita | Marcus, 1950 | |
| Geoplana | astraea | Marcus, 1951 | |
| Pasipha | astraea | (Marcus, 1951) | |
| Dugesia | astrocheta | Marcus, 1953 | |
| Plicastoma | astrum | Marcus, 1947 | |
| Plagiostomum | astrum | (Marcus, 1947) | |
| Proschizorhynchella | atopa | (Marcus, 1950) | |
| Schizorhynchoides | atopus | (Marcus, 1950) | |
| Proschizorhynchus | atopus | Marcus, 1950 | |
| Brinkmanniella | augusti | Marcus, 1951 | |
| Stylochoplana | aulica | Marcus, 1947 | |
| Alloioplana | aulica | (Marcus, 1947) | |
| Stylochoplana | aulica | Marcus, 1947 | |
| Plagiostomum | autectum | Marcus, 1948 | |
| Wydula | avia | Marcus, 1954 | |
| Geoplana | aymara | Du Bois-Reymond Marcus, 1951 | |
| Stylochoplana | bayeri | Marcus & Marcus, 1968 | |
| Heroplana | bayeri | (Marcus & Marcus, 1968) | |
| Stylochoplana | bayeri | Marcus & Marcus, 1968 | |
| Kuma | belca | Marcus, 1952 | |
| Gieysztoria | bellis | Marcus, 1946 | |
| (Gieysztoria) | bellis | Marcus, 1946 | |
| Choeradoplana | bilix | Marcus, 1951 | |
| Acerotisa | bituna | Marcus, 1947 | |
| Acerotisa | bituna | Marcus, 1947 | |
| Dugesiidae | Bopsula | Marcus, 1946 | |
| Macrostomum | brasiliense | Marcus, 1952 | |
| Archimacrostomum | brasiliense | (Marcus, 1952) | |
| Macrostomum | appendiculatum (1) | brasiliensis | Marcus, 1952 |
| Sabazius | brattstroemi | Marcus, 1954 | |
| Phaenocora | bresslaui | Marcus, 1946 | |
| Kuma | brevicauda | Marcus, 1950 | |
| Microstomum | breviceps | Marcus, 1951 | |
| Prorhynchus | brincki | Marcus, 1955 | |
| Mesostoma | brincki | Marcus, 1970 | |
| Phaenocora | brincki | Marcus & Marcus, 1959 | |
| Alleena | callizona | Marcus, 1947 | |
| Alleena | callizona | Marcus, 1947 | |
| Latocestus | callizona | (Marcus, 1947) | |
| Puiteca | camica | Du Bois-Reymond Marcus, 1955 | |
| Acmostomum | canarium | Marcus, 1947 | |
| Stylochoplaninae | Candimba | Marcus, 1949 | |
| incertae sedis | Candimba | Marcus, 1949 | |
| Geoplana | cantuta | Du Bois-Reymond Marcus, 1951 | |
| Vaillantiella | caribumba | Marcus, 1957 | |
| Heterochaerus | carvalhoi | (Marcus, 1952) | |
| Plicastoma | carvalhoi | Marcus, 1947 | |
| Amphiscolops | carvalhoi | Marcus, 1952 | |
| Plagiostomum | carvalhoi | (Marcus, 1947) | |
| Pericelis | cata | Marcus & Marcus, 1968 | |
| Pericelis | cata | Marcus & Marcus, 1968 | |
| Stylochus | catus | Du Bois-Reymond Marcus, 1958 | |
| Stylochus | catus | (Du Bois-Reymond Marcus, 1958) | |
| Imogine | catus | (Du Bois-Reymond Marcus, 1958) | |
| Geoplana | caya | Du Bois-Reymond Marcus, 1951 | |
| Adenopea | cenata | (Du Bois-Reymond Marcus, 1955) | |
| Convoluta | cenata | Du Bois-Reymond Marcus, 1955 | |
| Geoplana | chalona | Du Bois-Reymond Marcus, 1951 | |
| Geoplana | chilihua | Du Bois-Reymond Marcus, 1958 | |
| Dugesia | chilla | Marcus, 1954 | |
| Girardia | chilla | (Marcus, 1954) | |
| Othelosoma | chinum | Marcus, 1953 | |
| Plagiostomum | chionoecetis | Marcus, 1948 | |
| Pseudoceros | chloreus | Marcus, 1949 | |
| Pseudoceros | chloreus | Marcus, 1949 | |
| Phaenocora | chloroxantha | Marcus, 1946 | |
| Catenulida | Chordariidae | Marcus, 1945 | |
| Chordariidae | Chordarium | Marcus, 1945 | |
| Geoplana | chulpa | Du Bois-Reymond Marcus, 1951 | |
| Monocelis | cirrhosa | Marcus, 1949 | |
| Plagiostomum | clusum | Marcus, 1951 | |
| Geocentrophora | coeca | Marcus, 1944 | |
| Othelosoma | conyum | Marcus, 1953 | |
| Anokkostenostomum | corderoi | (Marcus, 1945) | |
| Leucolesma | corderoi | Marcus, 1948 | |
| Stenostomum | corderoi | Marcus, 1945 | |
| Chordarium | cryptum | Marcus, 1945 | |
| Tabaota | curiosa | Marcus, 1950 | |
| Triadomma | curvum | Marcus, 1949 | |
| Triadomma | curvum | Marcus, 1949 | |
| Triadomma | curvum | Marcus, 1949 | |
| Prosthiostomum | cynarium | Marcus, 1950 | |
| Prosthiostomum | cynarium | Marcus, 1950 | |
| Gieysztoria | cypris | Marcus, 1946 | |
| (Gieysztoria) | cypris | Marcus, 1946 | |
| Vorticeros | cyrtum | Marcus, 1947 | |
| Plagiostomum | cyrtum | (Marcus, 1947) | |
| Neokirgellinae | Daelja | Marcus, 1951 | |
| Pseudactinoposthia | daena | (Marcus, 1954) | |
| Mecynostomum | daenum | Marcus, 1954 | |
| Vorticeros | dahli | Marcus, 1954 | |
| Procerodes | dahli | Marcus & Marcus, 1959 | |
| Plagiostomum | dahli | (Marcus, 1954) | |
| Catenulidae | Dasyhormus | Marcus, 1945 | |
| Utelga | deina | Marcus, 1949 | |
| Macrostomum | delphax | Marcus, 1946 | |
| Haplocelis | dichona | (Marcus, 1954) | |
| Otocelis | dichona | Marcus, 1954 | |
| Strongylostoma | dicorymbum | Marcus, 1946 | |
| Uteriporinae | Dinizia | Marcus, 1947 | |
| Convoluta | divae | Marcus, 1950 | |
| Isodiametra | divae | (Marcus, 1950) | |
| Pseudaphanostoma | divae | Marcus, 1952 | |
| Thallagus | divae | Marcus, 1951 | |
| Itaipusa | divae | Marcus, 1949 | |
| Trigonostomum | divae | Marcus, 1948 | |
| Hoploplana | divae | Marcus, 1950 | |
| Candimba | divae | Marcus, 1949 | |
| Notoplana | divae | Marcus, 1948 | |
| Stylochoplana | divae | Marcus, 1947 | |
| Pentaplana | divae | Marcus, 1949 | |
| Boninia | divae | Marcus & Marcus, 1968 | |
| Minona | divae | Marcus, 1951 | |
| Dinizia | divae | Marcus, 1947 | |
| Geoplana | divae | Marcus, 1951 | |
| Candimba | divae | Marcus, 1949 | |
| Conaperta | divae | Marcus, 1950 | |
| Hoploplana | divae | Marcus, 1950 | |
| Notoplana | divae | Marcus, 1948 | |
| Armatoplana | divae | (Marcus, 1947) | |
| Stylochoplana | divae | Marcus, 1947 | |
| Stylochoplana | divae | (Marcus, 1949) | |
| Pentaplana | divae | Marcus, 1949 | |
| Boninia | divae | Marcus & Marcus, 1968 | |
| Obama | divae | (Marcus, 1951) | |
| Aphanostoma | divae | (Marcus, 1950) | |
| Geoplana | duca | Marcus, 1951 | |
| Dugesia | ectophysa | Marcus, 1953 | |
| Haploophorum | elachisterum | Marcus, 1948 | |
| Plagiostomum | elachisterum | (Marcus, 1948) | |
| Paraustrorhynchus | elixus | (Marcus, 1954) | |
| Austrorhynchus | elixus | Marcus, 1954 | |
| Promonotus | erinaceus | Marcus, 1950 | |
| Childia | etium | (Marcus, 1954) | |
| Paraphanostoma | etium | Marcus, 1954 | |
| Philosyrtis | eumeca | Marcus, 1950 | |
| Ilyplanoidea | Euplanidae | Marcus & Marcus, 1966 | |
| Nonatona | euscopa | Marcus, 1952 | |
| Nonatona | euscopa | Marcus, 1952 | |
| Amphiscolops | evelinae | Marcus, 1947 | |
| Hallangia | evelinae | Marcus, 1952 | |
| Eumecynostomum | evelinae | (Marcus, 1948) | |
| Mecynostomum | evelinae | Marcus, 1948 | |
| Pseudmecynostomum | evelinae | (Marcus, 1948) | |
| Nadina | evelinae | (Marcus, 1952) | |
| Rhynchoscolex | evelinae | Marcus, 1945 | |
| Catenula | evelinae | (Marcus, 1945) | |
| Chordarium | evelinae | Marcus, 1945 | |
| Allostoma | evelinae | (Marcus, 1948) | |
| Enterostomula | evelinae | Marcus, 1948 | |
| Rosmarium | evelinae | Marcus, 1950 | |
| Plagiostomum | evelinae | Marcus, 1946 | |
| Puzostoma | evelinae | Marcus, 1950 | |
| Tuilica | evelinae | Marcus, 1951 | |
| Urastoma | evelinae | Marcus, 1951 | |
| Gieysztoria | evelinae | Marcus, 1946 | |
| (Gieysztoria) | evelinae | Marcus, 1946 | |
| Nygulgus | evelinae | Marcus, 1954 | |
| Lurus | evelinae | Marcus, 1950 | |
| Baicalellia | evelinae | Marcus, 1946 | |
| Anoplodium | evelinae | Marcus, 1949 | |
| Syndesmis | evelinae | Marcus, 1968 | |
| Syndisyrinx | evelinae | (Marcus, 1968) | |
| Reinhardorhynchus | evelinae | (Marcus, 1954) | |
| Alcha | evelinae | Marcus, 1949 | |
| Artinga | evelinae | Marcus, 1948 | |
| Bothromesostoma | evelinae | Marcus, 1946 | |
| Marcomesostoma | evelinae | (Marcus, 1955) | |
| Mesostoma | evelinae | Marcus, 1955 | |
| Phaenocora | evelinae | Marcus, 1946 | |
| Haloplanella | evelinae | Marcus, 1954 | |
| Macrostomum | evelinae | Marcus, 1946 | |
| Myozona | evelinae | Marcus, 1949 | |
| Callioplana | evelinae | Marcus, 1954 | |
| Pucelis | evelinae | Marcus, 1947 | |
| Stylochoplana | evelinae | Marcus, 1952 | |
| Theama | evelinae | Marcus, 1949 | |
| Triadomma | evelinae | Marcus, 1947 | |
| Adenoplana | evelinae | Marcus, 1950 | |
| Enchiridium | evelinae | Marcus, 1949 | |
| Pseudoceros | evelinae | Marcus, 1950 | |
| Pseudobiceros | evelinae | (Marcus, 1950) | |
| Minona | evelinae | Marcus, 1946 | |
| Togarma | evelinae | Marcus, 1949 | |
| Itaspis | evelinae | Marcus, 1952 | |
| Kata | evelinae | Marcus, 1949 | |
| Rhodax | evelinae | Marcus, 1946 | |
| Nerpa | evelinae | Marcus, 1948 | |
| Miava | evelinae | Marcus, 1954 | |
| Tiddles | evelinae | Marcus, 1963 | |
| Bopsula | evelinae | Marcus, 1946 | |
| Cura | evelinae | Marcus, 1955 | |
| Dugesia | evelinae | Marcus, 1955 | |
| Geoplana | evelinae | Marcus, 1951 | |
| Othelosoma | evelinae | Marcus, 1970 | |
| Utsurus | evelinae | Marcus, 1954 | |
| Adenoplana | evelinae | Marcus, 1950 | |
| Triadomma | evelinae | Marcus, 1947 | |
| Notocomplana | evelinae | (Marcus, 1947) | |
| Pucelis | evelinae | Marcus, 1947 | |
| Interplana | evelinae | (Marcus, 1952) | |
| Stylochoplana | evelinae | Marcus, 1952 | |
| Theama | evelinae | Marcus, 1949 | |
| Callioplana | evelinae | Marcus, 1954 | |
| Enchiridium | evelinae | Marcus, 1949 | |
| Pseudoceros | evelinae | Marcus, 1950 | |
| Pseudobiceros | evelinae | (Marcus, 1950) | |
| Neppia | evelinae | Marcus, 1955 | |
| Stenostomum | evelinae | Marcus, 1945 | |
| Suomina | evelinae | Marcus, 1945 | |
| Anokkostenostomum | evelinae | Marcus, 1945 | |
| Obama | evelinae | (Marcus, 1951) | |
| Itaipusa | evelinae | (Marcus, 1954) | |
| Triadomma | evelinae | Marcus, 1947 | |
| Mesostoma | evelinae | (Marcus, 1946) | |
| (Tuilica) | evelinae | (Marcus, 1951) | |
| Mesostoma | ewerum | Du Bois-Reymond Marcus, 1951 | |
| Stylostomum | felinum | Marcus, 1954 | |
| Stylostomum | felinum | Marcus, 1954 | |
| Paulodora | felis | (Marcus, 1954) | |
| Paulodora | felis | felis | (Marcus, 1954) |
| Polycystis | felis | Marcus, 1954 | |
| Paulodora | fredelyna | (Marcus, 1948) | |
| Zuccaria | fredelyna | Marcus, 1948 | |
| Kalyla | gabriellae | Marcus, 1951 | |
| Polycystis | gabriellae | (Marcus, 1948) | |
| Zuccaria | gabriellae | Marcus, 1948 | |
| Macrostomum | gabriellae | Marcus, 1949 | |
| Microstomum | gabriellae | Marcus, 1950 | |
| Cycloporus | gabriellae | Marcus, 1950 | |
| Lurymare | gabriellae | (Marcus, 1949) | |
| Prosthiostomum | gabriellae | Marcus, 1949 | |
| Mesoda | gabriellae | Marcus, 1949 | |
| Vatapa | gabriellae | Marcus, 1948 | |
| Geoplana | gabriellae | Du Bois-Reymond Marcus, 1951 | |
| Archiloa | gabriellae | (Marcus, 1949) | |
| Cycloporus | gabriellae | Marcus, 1950 | |
| Enchiridium | gabriellae | (Marcus, 1949) | |
| Lurymare | gabriellae | (Marcus, 1949) | |
| Prosthiostomum | gabriellae | Marcus, 1949 | |
| Microplana | garavi | Du Bois-Reymond Marcus, 1957 | |
| Geoplana | garua | Du Bois-Reymond Marcus, 1951 | |
| Notogynaphallia | garua | (Du Bois-Reymond Marcus, 1951) | |
| Amphiscolops | gemelliporus | Marcus, 1954 | |
| Prosthiostomum | gilvum | Marcus, 1950 | |
| Prosthiostomum | gilvum | Marcus, 1950 | |
| Othelosoma | gnaum | Marcus, 1955 | |
| Planoceroidea | Gnesiocerotidae | Marcus & Marcus, 1968 | |
| Leptoplanoidea | Gnesiocerotidae | Marcus & Marcus, 1966 | |
| Geoplana | goetschi | Marcus, 1951 | |
| Rhynchodemus | graetzi | Du Bois-Reymond Marcus, 1953 | |
| Plagiostomidae | Haploophorum | Marcus, 1948 | |
| Plagiostomum | haploposthia | Marcus, 1948 | |
| Microplana | harea | Marcus, 1953 | |
| Placorhynchidae | Harsa | Marcus, 1951 | |
| Cratera | hina | (Marcus, 1951) | |
| Geoplana | hina | Marcus, 1951 | |
| Acanthozoon | hispidum | (Du Bois-Reymond Marcus, 1955) | |
| (Acanthozoon) | hispidum | Du Bois-Reymond Marcus, 1955 | |
| Acanthozoon | hispidus | Du Bois-Reymond Marcus, 1955 | |
| Pseudoceros | hispidus | Du Bois-Reymond Marcus, 1955 | |
| Notoplana | australis | huina | Marcus, 1954 |
| Hylocelis | huina | (Marcus, 1954) | |
| Notoplana | australis | huina (form) | Marcus, 1954 |
| Amyris | hummelincki | Marcus & Marcus, 1968 | |
| Amyris | hummelincki | Marcus & Marcus, 1968 | |
| Othelosoma | huntum | Marcus, 1955 | |
| Cylindrostoma | hyljeum | Marcus, 1952 | |
| Gieysztoria | hymanae | Marcus, 1946 | |
| (Gieysztoria) | hymanae | Marcus, 1946 | |
| Euplana | hymanae | Marcus, 1947 | |
| Euplana | hymanae | Marcus, 1947 | |
| Dugesia | hypoglauca | Marcus, 1948 | |
| Girardia | hypoglauca | Marcus, 1948 | |
| Cylindrostoma | ibeenum | Marcus, 1950 | |
| Haloplanella | ibla | Marcus, 1952 | |
| Gigantea | idaia | (Du Bois-Reymond Marcus, 1951) | |
| Geoplana | idaia | Du Bois-Reymond Marcus, 1951 | |
| Haplogonaria | idia | (Marcus, 1954) | |
| Mecynostomum | idium | Marcus, 1954 | |
| Cryptocelidinae | Igluta | Marcus & Marcus, 1968 | |
| Notoplanidae | Igluta | Marcus & Marcus, 1968 | |
| Cryptocelidinae | Igluta | Marcus & Marcus, 1968 | |
| Stylochus | (Imogine) | Marcus & Marcus, 1968 | |
| Microplaninae | Incapora | Du Bois-Reymond Marcus, 1953 | |
| Gieysztoria | intricata | Marcus, 1946 | |
| (Gieysztoria) | intricata | Marcus, 1946 | |
| Geoplana | irua | Du Bois-Reymond Marcus, 1958 | |
| Stylochus | isifer | Du Bois-Reymond Marcus, 1955 | |
| Distylochus | isifer | (Du Bois-Reymond Marcus, 1955) | |
| Stylochus | isifer | Du Bois-Reymond Marcus, 1955 | |
| Minona | itaipus | (Marcus, 1950) | |
| Peraclistus | itaipus (1) | Marcus, 1950 | |
| Koinocystididae | Itaipusa | Marcus, 1949 | |
| Hoploplanidae | Itannia | Marcus, 1947 | |
| Leptoplanidae | Itannia | Marcus, 1947 | |
| Otoplaninae | Itaspis | Marcus, 1952 | |
| Neokirgellinae | Kalyla | Marcus, 1951 | |
| Otoplaninae | Kata | Marcus, 1949 | |
| Proporidae | Kuma | Marcus, 1950 | |
| Haploposthiidae | Kuma | Marcus, 1950 | |
| Plagiostomum | kurrum | Marcus, 1951 | |
| Oneppus | lacus | Marcus, 1954 | |
| Thysanozoon | lagidium | Marcus, 1949 | |
| Thysanozoon | lagidium | Marcus, 1949 | |
| Geoplana | lama | Du Bois-Reymond Marcus, 1957 | |
| Geoplana | lambaya | Du Bois-Reymond Marcus, 1958 | |
| Plagiostomum | lapinum | Marcus, 1952 | |
| Notoplana | lapunda | Marcus & Marcus, 1968 | |
| Notoplana | lapunda | Marcus & Marcus, 1968 | |
| Pucelis | lapunda | (Marcus & Marcus, 1968) | |
| Geoplana | lareta | Du Bois-Reymond Marcus, 1958 | |
| Dasyhormus | lasius | Marcus, 1945 | |
| Stylochoplana | leptalea | Marcus, 1947 | |
| Armatoplana | leptalea | (Marcus, 1947) | |
| Stylochoplana | leptalea | Marcus, 1947 | |
| Leptoplanidae | Leptoplaninae | Marcus, 1947 | |
| Kata | leroda | Marcus, 1950 | |
| Catenula | leuca | Marcus, 1945 | |
| Acerotisa | leuca | Marcus, 1947 | |
| Acerotisa | leuca | Marcus, 1947 | |
| Chordarium | leucanthum | Marcus, 1945 | |
| Uteriporinae | Leucolesma | Marcus, 1948 | |
| Geoplana | leucophryna | Marcus, 1951 | |
| Amaga | libbieae | (Du Bois-Reymond Marcus, 1958) | |
| Geoplana | libbieae | Du Bois-Reymond Marcus, 1958 | |
| Cryptocelis | lilianae | Marcus & Marcus, 1968 | |
| Cryptocelis | lilianae | Marcus & Marcus, 1968 | |
| Pseudoceros | liparus | Marcus, 1950 | |
| Pseudoceros | liparus | Marcus, 1950 | |
| Dasyhormus | lithophorus | Marcus, 1945 | |
| Luridae | Lurus | Marcus, 1950 | |
| Prosthiostomidae | Lurymare | Marcus & Marcus, 1968 | |
| Prosthiostomidae | Lurymare | Marcus & Marcus, 1968 | |
| Pseudoceros | flavomarginatus | luteomarginatus | Marcus, 1950 |
| Byrsophlebs | lutheri | (Marcus, 1952) | |
| Maehrenthalia | lutheri | Marcus, 1952 | |
| Yagua | lutheri | Du Bois-Reymond Marcus, 1958 | |
| Dolichomacrostomum | lutheri | Marcus, 1948 | |
| Karlingia | lutheri | (Marcus, 1948) | |
| Meidiama | lutheri | Marcus, 1946 | |
| Stylochoplana | lynca | Du Bois-Reymond Marcus, 1958 | |
| Parviplana | lynca | (Du Bois-Reymond Marcus, 1958) | |
| Stylochoplana | lynca | Du Bois-Reymond Marcus, 1958 | |
| Convoluta | macnaei | Du Bois-Reymond Marcus, 1957 | |
| Pseudohaplogonaria | macnaei | (Du Bois-Reymond Marcus, 1957) | |
| Symsagittifera | macnaei | (Du Bois-Reymond Marcus, 1957) | |
| Catenula | macrura | Marcus, 1945 | |
| Sergia | mancala | Marcus & Marcus, 1957 | |
| Neosergia | mancala | (Marcus & Marcus, 1957) | |
| Rhynchodemus | marfa | Marcus, 1953 | |
| Rhynchodemus | hectori | marfa | Marcus, 1953 |
| Sergia | maricola | Marcus, 1957 | |
| Neosergia | maricola | (Marcus, 1957) | |
| Schizorhynchoides | martae | Marcus, 1950 | |
| Schizochilus | martae | (Marcus, 1950) | |
| Notoplana | martae | Marcus, 1948 | |
| Stylochus | martae | Marcus, 1947 | |
| Vannuccia | martae | Marcus, 1948 | |
| Notoplana | martae | Marcus, 1948 | |
| Pucelis | martae | (Marcus, 1948) | |
| Distylochus | martae | (Marcus, 1947) | |
| Stylochus | martae | Marcus, 1947 | |
| Paulodora | matarazzoi | Marcus, 1948 | |
| Polycystis | matarazzoi | (Marcus, 1948) | |
| Lurymare | matarazzoi | (Marcus, 1950) | |
| Prosthiostomum | matarazzoi | Marcus, 1950 | |
| Euprosthiostomum | matarazzoi | (Marcus, 1950) | |
| Lurymare | matarazzoi | (Marcus, 1950) | |
| Prosthiostomum | matarazzoi | Marcus, 1950 | |
| Stenostomum | materazzoi | Marcus, 1949 | |
| Phaenocelis | medvedica | Marcus, 1952 | |
| Phaenocelis | medvedica | Marcus, 1952 | |
| Phaenocelis | medvedica | Marcus, 1952 | |
| Notoplana | megala | Marcus, 1952 | |
| Notoplana | megala | Marcus, 1952 | |
| Pleioplana | megala | (Marcus, 1952) | |
| Laqueusplana | megala | (Marcus, 1952) | |
| Stenostomum | grande | megista | Marcus, 1945 |
| Archimonocelididae | Meidiama | Marcus, 1946 | |
| Promesostomidae | Memyla | Marcus, 1952 | |
| Archiloinae | Mesoda | Marcus, 1949 | |
| Palombiellinae | Miava | Marcus, 1954 | |
| Duplominona | mica | (Marcus, 1951) | |
| Minona | mica | Marcus, 1951 | |
| Notoplana | micheli | Marcus, 1949 | |
| Notoplana | micheli | Marcus, 1949 | |
| Haploposthia | microphoca | Marcus, 1950 | |
| Prosthiostomum | milcum | Marcus & Marcus, 1968 | |
| Prosthiostomum | milcum | Marcus & Marcus, 1968 | |
| Minoninae | Minona | Marcus, 1946 | |
| Plagiostomum | mirabile | Marcus, 1948 | |
| Rhynchodemus | misus | Du Bois-Reymond Marcus, 1965 | |
| Dugesia | monomyoda | Marcus, 1953 | |
| Pseudoceros | mopsus | Marcus, 1952 | |
| Phrikoceros | mopsus | (Marcus, 1952) | |
| Pseudoceros | mopsus | Marcus, 1952 | |
| Tytthosoceros | mopsus | (Marcus, 1952) | |
| Austromacrostomum | mortenseni | (Marcus, 1950) | |
| Dolichomacrostomum | mortenseni | Marcus, 1950 | |
| Euprosthiostomum | mortenseni | Marcus, 1948 | |
| Euprosthiostomum | mortensenii | Marcus, 1948 | |
| Parotoplana | moya | Marcus, 1949 | |
| Itannia | ornata | murna | Du Bois-Reymond Marcus, 1957 |
| ornata | murva | Du Bois-Reymond Marcus, 1957 | |
| Einarhelmins | mutsa | (Marcus, 1952) | |
| Monoophorum | mutsum | Marcus, 1952 | |
| Cylindrostoma | myfflum | Marcus, 1951 | |
| Macrostomorpha | Myozona | Marcus, 1949 | |
| Nematoplana | naia | Marcus, 1949 | |
| Rhynchoscolex | nanus | Marcus, 1945 | |
| Monocelidinae | Necia | Marcus, 1950 | |
| Eurylepta | neptis | Du Bois-Reymond Marcus, 1955 | |
| Eurylepta | neptis | Du Bois-Reymond Marcus, 1955 | |
| Bdellourinae | Nerpa | Marcus, 1948 | |
| Cylindrostoma | netsicum | Marcus, 1950 | |
| Plagiostomum | nonatoi | Marcus, 1948 | |
| Dugesia | nonatoi | Marcus, 1946 | |
| Girardia | nonatoi | Marcus, 1946 | |
| Latocestinae | Nonatona | Marcus, 1953 | |
| Latocestidae | Nonatona | Marcus, 1952 | |
| Leptoplanoidea | Notoplanidae | Marcus & Marcus, 1966 | |
| Stylochoplanidae | Notoplanides | Marcus & Marcus, 1968 | |
| Pseudograffillinae | Nygulgus | Marcus, 1954 | |
| Harsa | obnixa | Marcus, 1951 | |
| Latocestus | ocellatus | Marcus, 1947 | |
| Latocestus | ocellatus | Marcus, 1947 | |
| Prolatocestus | ocellatus | (Marcus, 1947) | |
| Placorhynchidae | Oneppus | Marcus, 1952 | |
| Itannia | ornata | Marcus, 1947 | |
| Itannia | ornata | Marcus, 1947 | |
| Aphanostoma | orphinum | Marcus, 1950 | |
| Pseudokuma | orphinum | (Marcus, 1950) | |
| Umagillinae | Ozametra | Marcus, 1949 | |
| Cura | paeta | Marcus, 1955 | |
| Dugesia | paeta | (Marcus, 1955) | |
| Neppia | paeta | (Marcus, 1955) | |
| Euprosthiostomum | pakium | Marcus & Marcus, 1968 | |
| Euprosthiostomum | pakium | Marcus & Marcus, 1968 | |
| Notoplana | palta | Marcus, 1954 | |
| Notoplana | palta | Marcus, 1954 | |
| Pucelis | palta | (Marcus, 1954) | |
| Ruanis | pandula | Marcus, 1952 | |
| Childia | pansa | Marcus, 1950 | |
| Monocelis | pardus | (Marcus, 1954) | |
| Promonotus | pardus | Marcus, 1954 | |
| Olisthanella | parva | Marcus, 1946 | |
| Pasipha | pasipha | (Marcus, 1951) | |
| Geoplana | pasipha | Marcus, 1951 | |
| Polycystidinae | Paulodora | Marcus, 1948 | |
| Geoplana | pavani | Marcus, 1951 | |
| Phaenocelis | peleca | Marcus & Marcus, 1968 | |
| Phaenocelis | peleca | Marcus & Marcus, 1968 | |
| Phaenocelis | peleca | Marcus & Marcus, 1968 | |
| Phaenoplana | peleca | (Marcus & Marcus, 1968) | |
| Haplogonaria | pellita | (Marcus, 1951) | |
| Mecynostomum | pellitum | Marcus, 1951 | |
| Trigonoporinae | Pentaplana | Marcus, 1949 | |
| Stylochocestidae | Pentaplana | Marcus, 1949 | |
| Microplana | perereca | Marcus & Marcus, 1959 | |
| Chordarium | philum | Marcus, 1945 | |
| Plicastoma | phocae | Marcus, 1947 | |
| Plagiostomum | phocae | (Marcus, 1947) | |
| Geoplana | phocaica | Marcus, 1951 | |
| Paraba | phocaica | (Marcus, 1951) | |
| Paraparaba | phocaica | (Marcus, 1951) | |
| Memyla | phocanella | Marcus, 1952 | |
| Macrostomum | phocurum | Marcus, 1954 | |
| Geoplana | pichuna | Du Bois-Reymond Marcus, 1951 | |
| Bothromesostoma | pieti | Marcus, 1960 | |
| Mesostoma | pieti | (Marcus, 1960) | |
| Rhynchodemus | piptus | Marcus, 1952 | |
| Acerotisa | piscatoria | Marcus, 1947 | |
| Acerotisa | piscatoria | Marcus, 1947 | |
| Eurylepta | piscatoria | (Marcus, 1947) | |
| Monocelidinae | Pistrix | Marcus, 1951 | |
| Rhynchoscolex | platypus | Marcus, 1945 | |
| Notoplana | plecta | Marcus, 1947 | |
| Notoplana | plecta | Marcus, 1947 | |
| Neokirgellinae | Pogaina | Marcus, 1954 | |
| Othelosoma | polecatum | Marcus, 1953 | |
| Monocelididae | Promonotinae | Marcus, 1949 | |
| Monocelis | psilus | (Marcus, 1954) | |
| Promonotus | psilus | Marcus, 1954 | |
| Stylochoplaninae | Pucelis | Marcus, 1947 | |
| Notoplanidae | Pucelis | Marcus, 1947 | |
| Othelosoma | pugum | Marcus, 1953 | |
| Cercyrini | Puiteca | Du Bois-Reymond Marcus, 1955 | |
| Notoplana | puma | Marcus, 1954 | |
| Notoplana | puma | Marcus, 1954 | |
| Tangaroa | pusa | Marcus, 1952 | |
| Trisaccopharynx | pusa | (Marcus, 1952) | |
| Rhynchoscolex | pusillus | Marcus, 1945 | |
| Plagiostomidae | Puzostoma | Marcus, 1950 | |
| Geoplana | quagga | Marcus, 1951 | |
| Geoplana | quenua | Du Bois-Reymond Marcus, 1958 | |
| Notoplana | queruca | Marcus & Marcus, 1968 | |
| Notoplana | queruca | Marcus & Marcus, 1968 | |
| Geoplana | quichua | Du Bois-Reymond Marcus, 1951 | |
| Candimboides | rabita | (Marcus & Marcus, 1968) | |
| Candimba | rabita | Marcus & Marcus, 1968 | |
| Candimba | rabita | Marcus & Marcus, 1968 | |
| Candimboides | rabita | (Marcus & Marcus, 1968) | |
| Armatoplana | rabita | (Marcus & Marcus, 1968) | |
| Stylochus | refertus | Du Bois-Reymond Marcus, 1965 | |
| Stylochus | refertus | Du Bois-Reymond Marcus, 1965 | |
| Imogine | refertus | (Du Bois-Reymond Marcus, 1965) | |
| Plagiostomum | remanei | Marcus, 1954 | |
| Microstomum | rhabdotum | Marcus, 1951 | |
| Koinocystididae | Rhinolasius | Marcus, 1951 | |
| Dimarcusidae | Rhodax | Marcus, 1946 | |
| Dugesia | rincona | Marcus, 1954 | |
| Girardia | rincona | (Marcus, 1954) | |
| Enterostomula | ronis | Marcus, 1954 | |
| Allostoma | ronis | (Marcus, 1954) | |
| Scleraulophoridae | Rosmarium | Marcus, 1950 | |
| Stenostomum | rosulatum | Marcus, 1945 | |
| Typhloplaninae | Ruanis | Marcus, 1952 | |
| Amaga | ruca | (Marcus, 1954) | |
| Wallmapuplana | ruca | (Marcus, 1954) | |
| Geoplana | ruca | (Marcus, 1954) | |
| Microplana | ruca | Marcus, 1954 | |
| Othelosoma | rudebecki | Marcus, 1955 | |
| Monocelidinae | Sabazius | Marcus, 1954 | |
| Othelosoma | saegeri | Marcus, 1955 | |
| Plagiostomum | sagax | Marcus, 1951 | |
| Geoplana | saima | Du Bois-Reymond Marcus, 1951 | |
| Cestoplana | salar | Marcus, 1949 | |
| Cestoplana | salar | Marcus, 1949 | |
| Procerodes | sameha | Marcus & Marcus, 1959 | |
| Prosthiostomum | sancum | Du Bois-Reymond Marcus, 1965 | |
| Prosthiostomum | sancum | Du Bois-Reymond Marcus, 1965 | |
| Rhinolasius | sartus | Marcus, 1951 | |
| Catenula | sawayai | (Marcus, 1945) | |
| Microdalyellia | sawayai | Marcus, 1946 | |
| Notoplana | sawayai | Marcus, 1947 | |
| Notoplana | sawayai | Marcus, 1947 | |
| Suomina | sawayai | Marcus, 1945 | |
| Archiloa | scalopura | (Marcus, 1949) | |
| Inaloa | scalopura | (Marcus, 1949) | |
| Monocelis | scalopura | Marcus, 1949 | |
| Archiloa | scalopus | Marcus, 1949 | |
| Cura | schubarti | (Marcus, 1946) | |
| Curtisia | schubarti | Marcus, 1946 | |
| Dugesia | schubarti | (Marcus, 1946) | |
| Girardia | schubarti | (Marcus, 1946) | |
| Rhynchodemus | schubarti | Du Bois-Reymond Marcus, 1955 | |
| Neppia | schubarti | (Marcus, 1946) | |
| Rhynchodemus | scius | Du Bois-Reymond Marcus, 1955 | |
| Prolecithophora | Scleraulophoridae | Marcus, 1950 | |
| Promesostoma | scylax | Marcus, 1952 | |
| Daelja | secuta | Marcus, 1951 | |
| Stylochoplana | selenopsis | Marcus, 1947 | |
| Stylochoplana | selenopsis | Marcus, 1947 | |
| Geoplana | shapra | Du Bois-Reymond Marcus, 1957 | |
| Stylochus | sixteni | Marcus, 1947 | |
| Stylochus | sixteni | (Marcus, 1947) | |
| Imogine | sixteni | Marcus, 1947 | |
| Stylochoplana | snadda | Marcus & Marcus, 1968 | |
| Armatoplana | snadda | (Marcus & Marcus, 1968) | |
| Stylochoplana | snadda | Marcus & Marcus, 1968 | |
| Necia | sopha | Marcus, 1950 | |
| Macrostomum | sp | Marcus, 1954 | |
| Scleraulophoridae | sp | Marcus, 1954 | |
| Rhynchodemus | sp. | Marcus, 1955 | |
| Rhynchodemus | sp. | Du Bois-Reymond Marcus, 1958 | |
| Kontikia | sp. | Marcus & Marcus, 1959 | |
| Pseudoceros | species (21) | Marcus, 1949 | |
| Pseudoceros | strigosus | Marcus, 1950 | |
| Pseudobiceros | strigosus | (Marcus, 1950) | |
| Pseudoceros | strigosus | Marcus, 1950 | |
| Pseudobiceros | strigosus | (Marcus, 1950) | |
| Stylochus | (Stylochus) | Marcus & Marcus, 1968 | |
| Catenulidae | Suomina | Marcus, 1945 | |
| Pogaina | suslica | (Marcus, 1951) | |
| Vejdovskya | suslica | Marcus, 1951 | |
| Notoplana | syntoma | Marcus, 1947 | |
| Notoplana | syntoma | Marcus, 1947 | |
| Pucelis | syntoma | (Marcus, 1947) | |
| Nematoplanidae | Tabaota | Marcus, 1950 | |
| Monocelis | tabira | Marcus, 1950 | |
| Cryptocelididae | Taenioplaninae | Marcus & Marcus, 1966 | |
| Cryptocelididae | Taenioplaninae | Marcus & Marcus, 1966 | |
| Geoplana | takia | Du Bois-Reymond Marcus, 1951 | |
| Vannuccia | talea | Marcus, 1954 | |
| Anoplovannuccia | talea | (Marcus, 1954) | |
| Geoplana | talpa | Du Bois-Reymond Marcus, 1951 | |
| Solenopharynginae | Tangaroa | Marcus, 1952 | |
| Trapichorhynchus | tapes | Marcus, 1949 | |
| Geoplana | tapetilla | Marcus, 1951 | |
| Pasipha | tapetilla | (Marcus, 1951) | |
| Cheliplana | targa | (Marcus, 1952) | |
| Rhinepera | targa | Marcus, 1952 | |
| Cratera | taxiarcha | (Marcus, 1951) | |
| Geoplana | taxiarcha | Marcus, 1951 | |
| Cestoplana | techa | Du Bois-Reymond Marcus, 1957 | |
| Cestoplana | techa | Du Bois-Reymond Marcus, 1957 | |
| Pseudostomidae | Thallagus | Marcus, 1951 | |
| Cylindrostomidae | Thallagus | Marcus, 1951 | |
| Convoluta | thauma | Marcus, 1952 | |
| Deuterogonaria | thauma | (Marcus, 1952) | |
| Theamatidae | Theama | Marcus, 1949 | |
| Theamatidae | Theama | Marcus, 1949 | |
| Planoceroidea | Theamatidae | Marcus, 1949 | |
| Boninioidea | Theamatidae | Marcus, 1949 | |
| Leptoplanoidea | Theamatidae | Marcus, 1949 | |
| Chromoplanoidea | Theamatidae | Marcus, 1949 | |
| Plagiostomum | thelotrichum | Marcus, 1951 | |
| Archiloa | thelura | (Marcus, 1951) | |
| Pistrix | thelura | Marcus, 1951 | |
| Mesoda | thelura | (Marcus, 1951) | |
| Gieysztoria | therapaina | Marcus, 1946 | |
| (Gieysztoria) | therapaina | Marcus, 1946 | |
| (Marcusiella) | thymara | (Marcus, 1946) | |
| (Gieysztoria) | thymara | Marcus, 1946 | |
| Stylochus | ticus | Marcus, 1952 | |
| Stylochus | ticus | Marcus, 1952 | |
| Imogine | ticus | (Marcus, 1952) | |
| Maricola | Tiddles | Marcus, 1963 | |
| Pogaina | tifa | Marcus, 1954 | |
| Monoophorum | tigacum | Marcus, 1950 | |
| Oneppus | timius | Marcus, 1952 | |
| Pseudanaperus | tinctus | (Marcus, 1952) | |
| Paraproporus | tinctus | Marcus, 1952 | |
| Hofstenia | tinga | Du Bois-Reymond Marcus, 1957 | |
| Marcusiola | tinga | (Du Bois-Reymond Marcus, 1957) | |
| Cura | tinga | Marcus, 1955 | |
| Dugesia | tinga | (Marcus, 1955) | |
| Neppia | tinga | (Marcus, 1955) | |
| Igluta | tipuca | Marcus & Marcus, 1968 | |
| Igluta | tipuca | Marcus & Marcus, 1968 | |
| Notoplana | tipuca | (Marcus & Marcus, 1968) | |
| Igluta | tipuca | Marcus & Marcus, 1968 | |
| Nematoplanidae | Togarma | Marcus, 1949 | |
| Kalyptorhynchia | Toia | Marcus, 1952 | |
| Schizorhynchidae | Trapichorhynchus | Marcus, 1949 | |
| Cryptocelidinae | Triadomma | Marcus, 1947 | |
| Faubelidae | Triadomma | Marcus, 1947 | |
| Cryptocelidinae | Triadomma | Marcus, 1947 | |
| Microstomum | trichotum | Marcus, 1950 | |
| Duplominona | tridens | (Marcus, 1954) | |
| Minona | tridens | Marcus, 1954 | |
| Gieysztoria | tridesma | Marcus, 1946 | |
| (Gieysztoria) | tridesma | Marcus, 1946 | |
| Geoplana | trina | Marcus, 1951 | |
| Pasipha | trina | (Marcus, 1951) | |
| Xerapoa | trina | Marcus, 1951 | |
| Lenopharynx | triops | Marcus, 1951 | |
| Gieysztoria | trisolena | Marcus, 1946 | |
| (Gieysztoria) | trisolena | Marcus, 1946 | |
| Plagiostomidae | Tuilica | Marcus, 1951 | |
| Acmostomum | (Tuilica) | Marcus, 1951 | |
| Eurylepta | turma | Marcus, 1952 | |
| Eurylepta | turma | Marcus, 1952 | |
| Stenostomum | grande | typica | Marcus, 1945 |
| Amyris | ujara | Marcus & Marcus, 1968 | |
| Amyris | ujara | Marcus & Marcus, 1968 | |
| Microstomum | ulum | Marcus, 1950 | |
| Gieysztoria | uncia | Marcus, 1946 | |
| (Gieysztoria) | uncia | Marcus, 1946 | |
| Zygantroplana | ups | Marcus & Harry, 1983 | |
| Zygantroplana | ups | Marcus & Harry, 1983 | |
| Fecampiida | Urastomatidae | Marcus, 1951 | |
| Convoluta | urua | Marcus, 1954 | |
| Isodiametra | urua | (Marcus, 1954) | |
| Conaperta | urua | (Marcus, 1954) | |
| Praeconvoluta | urua | (Marcus, 1954) | |
| Lurymare | utarum | (Marcus, 1952) | |
| Prosthiostomum | utarum | Marcus, 1952 | |
| Lurymare | utarum | (Marcus, 1952) | |
| Prosthiostomum | utarum | Marcus, 1952 | |
| Koinocystididae | Utelga | Marcus, 1949 | |
| Koinocystididae | Utsurus | Marcus, 1954 | |
| Coelogynoporidae | Vannuccia | Marcus, 1948 | |
| Uteriporinae | Vatapa | Marcus, 1948 | |
| Macrostomum | tuba | verbekei | Marcus & Marcus, 1957 |
| Macrostomum | verbekei | Marcus & Marcus, 1957 | |
| Convoluta | vexillaria | Marcus, 1948 | |
| Isodiametra | vexillaria | (Marcus, 1948) | |
| Conaperta | vexillaria | (Marcus, 1948) | |
| Aphanostoma | vexillaria | (Marcus, 1948) | |
| Geoplana | vicuna | Du Bois-Reymond Marcus, 1957 | |
| Geoplana | vicuna | Du Bois-Reymond Marcus, 1957 | |
| Promonotus | villacae | Marcus, 1949 | |
| Dolichoplana | vircata | Du Bois-Reymond Marcus, 1951 | |
| Macrostomum | viride (3) | Marcus, 1946 | |
| Othelosoma | voleum | Marcus, 1953 | |
| Stylochoplana | walsergia | Marcus & Marcus, 1968 | |
| Stylochoplana | walsergia | Marcus & Marcus, 1968 | |
| Othelosoma | wauzen | Marcus, 1955 | |
| Childia | westbladi | (Marcus, 1950) | |
| Convoluta | westbladi | Marcus, 1949 | |
| Isodiametra | westbladi | (Marcus, 1949) | |
| Conaperta | westbladi | (Marcus, 1949) | |
| Paraphanostoma | westbladi | Marcus, 1950 | |
| Aphanostoma | westbladi | (Marcus, 1949) | |
| Geoplana | weyrauchi | Du Bois-Reymond Marcus, 1951 | |
| Pasipha | weyrauchi | (Du Bois-Reymond Marcus, 1951) | |
| Incapora | weyrauchi | Du Bois-Reymond Marcus, 1953 | |
| Cura | wimbimba | Marcus, 1970 | |
| Dugesia | wimbimba | Marcus, 1970 | |
| Neppia | wimbimba | (Marcus, 1970) | |
| Promesostomidae | Wydula | Marcus, 1954 | |
| Stylochoplana | wyona | Marcus & Marcus, 1968 | |
| Alloioplana | wyona | (Marcus & Marcus, 1968) | |
| Stylochoplana | wyona | Marcus & Marcus, 1968 | |
| Paraproporus | xanthus | Marcus, 1950 | |
| Marcusia | yagana | (Marcus, 1954) | |
| Polycystis | yagana | Marcus, 1954 | |
| Macrorhynchus | yagana | (Marcus, 1954) | |
| Protoplanellinae | Yagua | Du Bois-Reymond Marcus, 1958 | |
| Microplana | yaravi | Du Bois-Reymond Marcus, 1957 | |
| Toia | ycia | Marcus, 1952 | |
| Zygantroplana | yrsa | Marcus & Marcus, 1968 | |
| Ilyella | yrsa | (Marcus & Marcus, 1968) | |
| Zygantroplana | yrsa | Marcus & Marcus, 1968 | |
| Polycystidinae | Zuccaria | Marcus, 1948 |
743 names, including those in new combination. (Max listing set to 900)