| Catenula alitha Marcus, 1945 | | w | primary taxonomic authority (describer) | 13-14, Fig 3 |
| Catenula leuca Marcus, 1945 | | w | primary taxonomic authority (describer) | 14-15, Fig 4 |
| Catenula macrura Marcus, 1945 | | w | primary taxonomic authority (describer) | 15-16, Fig 5 |
| Catenulidae Dasyhormus Marcus, 1945 | | w | primary taxonomic authority (describer) | |
| Dasyhormus lasius Marcus, 1945 | | w | primary taxonomic authority (describer) | 16-17, Fig 6 |
| Dasyhormus lithophorus Marcus, 1945 | | w | primary taxonomic authority (describer) | 17-18, Fig 7 |
| Rhynchoscolex evelinae Marcus, 1945 | | w | primary taxonomic authority (describer) | 66-67, Fig. 37 |
| Rhynchoscolex nanus Marcus, 1945 | | w | primary taxonomic authority (describer) | 69-70, Fig. 40 |
| Rhynchoscolex platypus Marcus, 1945 | | w | primary taxonomic authority (describer) | 67-68, Fig. 38 |
| Rhynchoscolex pusillus Marcus, 1945 | | w | primary taxonomic authority (describer) | |
| Catenulidae Suomina Marcus, 1945 | | w | primary taxonomic authority (describer) | 19-20 |
| Catenula evelinae (Marcus, 1945) | [with synonyms] | w | primary taxonomic authority (describer) | 21, Fig 9 |
| Catenula sawayai (Marcus, 1945) | [with synonyms] | w | primary taxonomic authority (describer) | 22-23, Fig 10 |
| Catenulida Chordariidae Marcus, 1945 | | w | primary taxonomic authority (describer) | |
| Chordariidae Chordarium Marcus, 1945 | | w | primary taxonomic authority (describer) | 23-24 |
| Chordarium cryptum Marcus, 1945 | | w | primary taxonomic authority (describer) | 28-29, Fig 14 |
| Chordarium evelinae Marcus, 1945 | | w | primary taxonomic authority (describer) | 24-25, Fig 11 |
| Chordarium leucanthum Marcus, 1945 | | w | primary taxonomic authority (describer) | 25-27, Fig 12 |
| Chordarium philum Marcus, 1945 | | w | primary taxonomic authority (describer) | 27-28, Fig 13 |
| Stenostomum amphotum Marcus, 1945 | | w | primary taxonomic authority (describer) | 59-60, Fig. 32 |
| Anokkostenostomum anatirostrum (Marcus, 1945) | | w | primary taxonomic authority (describer) | |
| Anokkostenostomum corderoi (Marcus, 1945) | | w | primary taxonomic authority (describer) | |
| Stenostomum grande megista Marcus, 1945 | | w | primary taxonomic authority (describer) | |
| Stenostomum grande typica Marcus, 1945 | | w | primary taxonomic authority (describer) | |
| Stenostomidae Rhynchoscolex Leidy, 1852 | | w | latest taxonomic authority | |
| Rhynchoscolex diplolithicus Reisinger, 1924 | | w | latest taxonomic authority | |
| Rhynchoscolex simplex plotnikovi Beklemischev, 1923 | [with synonyms] | w | latest taxonomic authority | |
| Catenula turgida (Zacharias, 1902) | [with synonyms] | w | other taxonomic work | 5, 10, 48, 79 |
| Stenostomum agile Silliman, 1885 | | w | latest taxonomic authority | |
| Stenostomum arevaloi Gieysztor, 1931 | [with synonyms] | w | other taxonomic work | 48-49, fig. 25 |
| Stenostomum bicaudatum Kennel, 1888 | | w | other taxonomic work | 32-34, Fig 15 |
| Stenostomum brevipharyngium Kepner & Carter, 1931 | [with synonyms] | w | other taxonomic work | |
| Stenostomum ciliatum Kepner & Carter, 1931 | [with synonyms] | w | other taxonomic work | 43-45, fig. 22 |
| Stenostomum coluber Leydig, 1854 | | w | latest taxonomic authority | |
| Stenostomum gigerium Kepner & Carter, 1931 | [with synonyms] | w | other taxonomic work | |
| Stenostomum grande Child, 1902 | [with synonyms] | w | other taxonomic work | 34-35, Fig 16 |
| Stenostomum incaudatum Sonneborn, 1930 | | w | latest taxonomic authority | |
| Stenostomum langi Keller, 1894 | | w | latest taxonomic authority | |
| Anokkostenostomum membranosum (Kepner & Carter, 1931) | | w | other taxonomic work | |
| Stenostomum oesophagum Kepner & Carter, 1931 | | w | latest taxonomic authority | |
| Stenostomum paraguayense (Martin, 1908) | [with synonyms] | w | other taxonomic work | 36-37, fig 17 |
| Stenostomum perforatum Beklemischev, 1921 | | w | latest taxonomic authority | |
| Anokkostenostomum pseudoacetabulum (Nuttycombe & Waters, 1935) | | w | other taxonomic work | |
| Anokkostenostomum saliens (Kepner & Carter, 1931) | | w | other taxonomic work | |
| Stenostomum saltatum Kepner & Carter, 1931 | | w | latest taxonomic authority | |
| Stenostomum simplex Kepner & Carter, 1931 | | w | other taxonomic work | |
| Stenostomum stuhlmanni Bohmig, 1897 | | w | other taxonomic work | |
| Stenostomum turgidum Zacharias, 1902 | | w | latest taxonomic authority | |
| Stenostomum uronephrium Nuttycombe, 1931 | | w | other taxonomic work | 50-51, Fig. 26 |
| Stenostomum virginianum Nuttycombe, 1931 | [with synonyms] | w | other taxonomic work | 51-53, Fig. 27 |
| Stenostomidae Weldonia Martin, 1908 | | w | latest taxonomic authority | |
| Weldonia paraguayensis Martin, 1908 | | w | latest taxonomic authority | |
| Diotis grisea Schmarda, 1859 | | w | latest taxonomic authority | |
| Catenula lemnae Duges, 1832 | [with synonyms] | w | other taxonomic work | in text, f. 7, 8, 14, 19, 33, 37, 38, 43, 46, 53 |
| Catenula quaterna Schmarda, 1859 | [with synonyms] | w | other taxonomic work | |
| Stenostomum anatirostrum Marcus, 1945 | [with synonyms] | w | primary taxonomic authority (describer) | 60-61, Fig. 33 |
| Stenostomum corderoi Marcus, 1945 | [with synonyms] | w | primary taxonomic authority (describer) | 61-62, Fig. 34 |
| Stenostomum evelinae Marcus, 1945 | [with synonyms] | w | primary taxonomic authority (describer) | 62-63, Fig. 35 |
| Platyhelminthes Catenulida Meixner, 1924 | | w | other taxonomic work | 2-7 |
| Catenulidae Catenula Duges, 1832 | [with synonyms] | w | other taxonomic work | 8-16 |
| Stenostomidae Stenostomum Schmidt, 1848 | [with synonyms] | w | other taxonomic work | 29-32 |
| Stenostomum tenuicauda Graff, 1911 | | w | other taxonomic work | 38-39, fig. 18 |
| Stenostomum tauricum Nasonov, 1924 | | w | other taxonomic work | 39-40, fig 19 |
| Stenostomum simplex Kepner & Carter, 1931 | | w | other taxonomic work | 41-42, Fig. 20 |
| Stenostomum membranosum Kepner & Carter, 1931 | [with synonyms] | w | other taxonomic work | 42-43, fig. 21 |
| Stenostomum glandulosum Kepner & Carter, 1931 | | w | other taxonomic work | 45-46, Fig. 23 |
| Stenostomum saliens Kepner & Carter, 1931 | [with synonyms] | w | other taxonomic work | 46-47, fig. 24 |
| Stenostomum cryptops Nuttycombe & Waters, 1935 | | w | other taxonomic work | 55-56, Fig. 29 |
| Stenostomum tuberculosum Nuttycombe & Waters, 1938 | [with synonyms] | w | other taxonomic work | 56-57, Fig. 30 |
| Stenostomum pegephilum Nuttycombe & Waters, 1938 | [with synonyms] | w | other taxonomic work | 58, Fig. 31 |
| Rhynchoscolex simplex Leidy, 1852 | [with synonyms] | w | other taxonomic work | 64-66, Fig. 36 |
| Suomina evelinae Marcus, 1945 | | w | primary taxonomic authority (describer) | 21, Fig 9 |
| Suomina evelinae Marcus, 1945 | | w | latest taxonomic authority | 21, Fig 9 |
| Suomina sawayai Marcus, 1945 | | w | primary taxonomic authority (describer) | 22-23, Fig 10 |
| Suomina sawayai Marcus, 1945 | | w | latest taxonomic authority | 22-23, Fig 10 |
| Catenulidae Fuhrmannia Graff, 1908 | | w | latest taxonomic authority | 19 |
| Anokkostenostomum evelinae Marcus, 1945 | | w | primary taxonomic authority (describer) | |
| Anokkostenostomum evelinae Marcus, 1945 | | w | latest taxonomic authority | |
