| Archaphanostoma macrospiriferum (Westblad, 1946) | | 20-30 m | soft bottom | Lectotype No. 2494, Swedish Museum of Natural History |
| Nemertoderma westbladi (Westblad, 1937) | 22 July, 1932 | 10 m | mud-clay | |
| Paedomecynostomum bruneum Dörjes, 1968 | prior 1975 | 5-10 m | | |
| Childia crassum (Westblad, 1942) | prior 1975 | 30-100 m | | Swedish west coast, Gullmaren, several locations. |
| Eumecynostomum altitudi Faubel & Regier, 1983 | Jul 2000 | | | |
| Childia cycloposthium (Westblad, 1942) | Jul-Aug 2003 | 30-60 m | mud | Koster and Gullmar Fjord. |
| Childia trianguliferum (Westblad, 1942) | Jul-Aug 2003 | 30-60 m | mud | Koster and Gullmar Fjord. |
| Childia submaculatum (Westblad, 1942) | Jul-Aug 2003 | 30-60 m | mud | Koster and Gullmar Fjord. |
| Childia crassum (Westblad, 1942) | Jul-Aug 2003 | 30-60 m | mud | Koster and Gullmar Fjord. |
| Childia brachyposthium (Westblad, 1942) | Jul-Aug 2003 | 30-60 m | mud | Koster and Gullmar Fjord. |
| Childia macroposthium (Steinböck, 1931) | Jul-Aug 2003 | 30-60 m | mud | Koster and Gullmar Fjord. |
| Macrostomum balticum Luther, 1947 | prior to 1960 | 0.0-0.5 m | fine sand | |
| Messoplana elegans Luther, 1948 | prior to 1956 | | | collected by Luther and Riedl in the surroundings of Kristineberg along the Swedish west coast. |
| Euxinia baltica Meixner, 1938 | prior to 1993 | | | Live specimens and six serially section specimens from the North Sea, Bergen area, Håkonsund; Skagerrak, Kristineberg area, Kvarnik. Leg. Karling |
| Proxenetes westbladi Luther, 1943 | Aug 15, 1930 | | Sand | came from Westblad. Swedish west coast, Zoological Station Kristineberg in the Bay of Kristinebergsviken. |
| Anoplodium stichopi Bock, 1925 | 1994 or earlier | | Stichopus tremulus | Specimens of Stichopus tremulus Gunnerus, 1767 were collected in the Gullmarfjordes near Kristineberg Marine Biological Station by Prof. Dr. P. Ax. |
| Procerodes littoralis (Ström, 1768) | 1907 or earlier | | | Swedische Westküste: Kristenberg |