| Platydemus atropurpureus Graff, 1899 | | w | latest taxonomic authority | |
| Platydemus lividus Graff, 1899 | | w | latest taxonomic authority | |
| Rhynchodemus atropurpureus (Graff, 1899) | | w | latest taxonomic authority | |
| Gnesiocerotidae Planctoplanella Hyman, 1940 | | - | primary taxonomic authority (describer) | 479 |
| Planctoplanella atlantica Hyman, 1940 | | - | primary taxonomic authority (describer) | 479-481, Figs 29 d; 30 |
| Hoploplana inquilina thaisana (Pearse) Hyman, 1940 | | w | primary taxonomic authority (describer) | 477 |
| Euplana carolinensis Hyman, 1940 | | - | primary taxonomic authority (describer) | 472-473, Figs 28 b-d |
| Leptoplana drowbachensis Hyman, 1940 | | w | primary taxonomic authority (describer) | |
| Stylochoplaninae Digynopora Hyman, 1940 | | - | primary taxonomic authority (describer) | 473 |
| Digynopora americana Hyman, 1940 | | - | primary taxonomic authority (describer) | 473-476, Figs. 29, a-c |
| Discocelididae Coronadena Hyman, 1940 | | - | primary taxonomic authority (describer) | 450 |
| Acerotisa baiae Hyman, 1940 | | - | primary taxonomic authority (describer) | 489-490, Fig. 31 d |
| Coronadena mutabilis (Verrill, 1873) | | - | other taxonomic work | 450 |
| Discocelidae Coronadena Hyman, 1940 | | w | primary taxonomic authority (describer) | 450 |
| Euplana carolinensis Hyman, 1940 | [with synonyms] | w | primary taxonomic authority (describer) | 472-473, Figs 28 b-d |
| Gnesiocerotidae Planctoplanella Hyman, 1940 | | w | primary taxonomic authority (describer) | 479 |
| Planctoplanella atlantica Hyman, 1940 | [with synonyms] | w | primary taxonomic authority (describer) | |
| Hoploplana inquilina thaisani var. Hyman, 1940 | | w | primary taxonomic authority (describer) | |
| Acerotisa baiae Hyman, 1940 | [with synonyms] | w | primary taxonomic authority (describer) | 489 |
| Stylochoplanidae Digynopora Hyman, 1940 | | w | primary taxonomic authority (describer) | 473 |
| Digynopora americana Hyman, 1940 | [with synonyms] | w | primary taxonomic authority (describer) | 473 |
| Latocestus whartoni (Pearse, 1938) | | - | other taxonomic work | 458 |
| Discocelides ellipsoides (Girard, 1853) | | w | other taxonomic work | 454-457, Figs 24 c, 25 a |
| Stylochoidea Plehniidae Bock, 1913 | | w | other taxonomic work | 453 |
| Plehniidae Discocelides Bergendal, 1893 | | - | other taxonomic work | 454 |
| Stylochoidea Latocestidae Laidlaw, 1903 | | - | other taxonomic work | 457 |
| Latocestinae Latocestus Plehn, 1896 | [with synonyms] | - | other taxonomic work | 457 |
| Stylochinae Stylochus Ehrenberg, 1831 | [with synonyms] | - | other taxonomic work | 459 |
| Stylochus ellipticus (Girard, 1850) | | - | other taxonomic work | 459-461, Fig. 25 c |
| Stylochus frontalis Verrill, 1893 | | w | other taxonomic work | 461-462 |
| Stylochus oculiferus (Girard, 1853) | | w | other taxonomic work | 464-466, Figs 27, 28 a |
| Planoceroidea Leptoplanidae Stimpson, 1857 | | - | other taxonomic work | 467 |
| Stylochoplaninae Stylochoplana Stimpson, 1857 | | - | other taxonomic work | 467 |
| Stylochoplana angusta (Verrill, 1893) | | - | other taxonomic work | 467 |
| Stylochoplaninae Notoplana Laidlaw, 1903 | | - | other taxonomic work | 468 |
| Notoplana atomata (Müller, 1776) | | - | other taxonomic work | 468-470 |
| Euplana gracilis (Girard, 1850) | | - | other taxonomic work | 470-472 |
| Hoploplanidae Hoploplana Laidlaw, 1902 | | - | other taxonomic work | 476 |
| Hoploplana inquilina (Wheeler, 1894) | | - | other taxonomic work | 476 |
| Planoceroidea Planoceridae Lang, 1884 | | - | other taxonomic work | 477 |
| Gnesiocerotidae Gnesioceros Diesing, 1862 | [with synonyms] | - | other taxonomic work | 478 |
| Gnesioceros floridana (Pearse, 1938) | | - | other taxonomic work | 478-479, |
| Planoceroidea Enantiidae Graff, 1889 | | - | other taxonomic work | 481 |
| Enantiidae Enantia Graff, 1889 | | - | other taxonomic work | 482 |
| Enantia pellucida (Pearse, 1938) | | - | other taxonomic work | 482-484, Fig. 31 a, b |
| Thysanozoon nigrum Girard, 1851 | | - | other taxonomic work | 484-485 |
| Thysanozoon brocchii (Risso, 1818) | | - | other taxonomic work | 485 |
| Pseudoceros maculosus Pearse, 1938 | | - | other taxonomic work | 485-486 |
| Eurylepta maculosa Verrill, 1893 | | - | other taxonomic work | 486 |
| Oligoclado floridanus Pearse, 1938 | | - | other taxonomic work | 487-489, Fig. 31 c |
| Prosthiostomum lobatum Pearse, 1938 | | - | other taxonomic work | 490-491 |
| Amplimatricata Polycladida Lang, 1884 [sensu Faubel 1983/1984] | | w | other taxonomic work | |
| Polycladida Acotylea Lang, 1884 | | w | other taxonomic work | |
| Acotylea Craspedommatidea Bock, 1913 | | w | other taxonomic work | |
| Polycladida (II) Acotylea Lang, 1884 | [with synonyms] | - | other taxonomic work | |
| Discoceloidea Discocelidae Laidlaw, 1903 | [with synonyms] | w | other taxonomic work | |
| Stylochoidea Plehniidae Bock, 1913 | | w | other taxonomic work | |
| Stylochoidea Plehniidae Bock, 1913 [sensu Prudhoe, 1985] | [with synonyms] | w | other taxonomic work | |
| Plehniidae Discocelides Bergendal, 1893 | | w | other taxonomic work | |
| Stylochoidea Latocestidae I Laidlaw, 1903 | | w | other taxonomic work | |
| Latocestidae I Latocestus Plehn, 1896 | [with synonyms] | w | other taxonomic work | |
| Stylochoidea Stylochidae Stimpson, 1857 | | w | other taxonomic work | |
| Stylochus zebra (Verrill, 1882) | | w | other taxonomic work | |
| Stylochus crassus Verrill, 1893 | | - | other taxonomic work | |
| Spinantia pellucida (Pearse, 1938) | [with synonyms] | w | other taxonomic work | |
