| Avagina polyvacuola Ehlers & Doerjes, 1979 | November 1972 | tidal pools | rocky north and south of mangroves | Eulitoral and sublitoral |
| Praeaphanostoma vitreum Ehlers & Doerjes, 1979 | November 1972 | tidal pools | rocky north and south of mangroves | |
| Philocelis karlingi pacifica Ehlers & Doerjes, 1979 | November 1972 | tidal pools | rocky north and south of mangroves | common in the lower sandy beach slope and in the transition zone in front of the sand flat. |
| Cheliplana barringtonensis Noldt & Hoxhold, 1984 | 1972 and 1973 | tidal pools | rocky north and south of mangroves | |
| Monocelis oculifera Ax & Ax, 1977 | September 1972 | tidal pools | rocky north and south of mangroves | mangrove stumps, detritus sand between mangrove roots. |
| Peraclistus stimula Ax & Ax, 1977 | September 1972 | tidal pools | rocky north and south of mangroves | pool rich with detritus, coral sand amoung mangroves. |
| Duplominona krameri Ax & Ax, 1977 | September 1972 | tidal pools | rocky north and south of mangroves | rocky pool with coarse sand. |
| Myobulla myobulla Artois & Schockaert, 2000 | 1972 | tidal pools | rocky north and south of mangroves | |
| Myobulla dunata Artois & Schockaert, 2000 | 1972 | tidal pools | rocky north and south of mangroves | |
| Limipolycystis sp. Artois & Schockaert, 2000 | 1972 | tidal pools | rocky north and south of mangroves | southern beach |
| Galapagorhynchus hoxholdi Artois & Schockaert, 1999 | 1972 | tidal pools | rocky north and south of mangroves | southern beach |
| Djeziraia incana Artois & Schockaert, 2001 | 1972-1973 | | | exact location remains uncertain. |
| Paulodora felis asymmetrica Artois & Schockaert, 2001 | 1972-1973 | | | |
| Gyratrix hermaphroditus species II Galapagos Artois & Schockaert, 2001 | 1972-1973 | | | southern beach |
| Gyratrix hermaphroditus species III Galapagos Artois & Schockaert, 2001 | 1972-1973 | | | southern beach |
| Macrostomum astericis Schmidt & Sopott-Ehlers, 1976 | 1976 or earlier | | | |
| Itaipusa divae Marcus, 1949 | | | rock pools | |
| Reinhardorhynchus variodentatus (Karling, Mack-Fira, & Doerjes, 1972) | | | rock pools | |
| Galapagetula annikae Reygel, Willems & Artois, 2011 | | | rock pools | |
| Utelga heinckei (Attems, 1897) | | | rock pools | |