| Itaspiella helgolandica (Meixner, 1938) | Aug-Sep 1984 |  | medium-coarse sand, boulders | Marine to brackish. | 
| Notocaryoplanella glandulosa (Ax, 1951) | Aug-Sep 1984 |  | coarse sand, boulders | poor in detritus. | 
| Promesostoma cochleare Karling, 1935 | Aug-Sep 1984 |  | medium-coarse sand | inner side of the Elmtree River estuary. | 
| Ptychopera spinifera den Hartog, 1966 | Aug-Sep 1984 |  |  | Elmtree River.  Salt marsh with Spartina and Salicornia species. | 
| Acrorhynchides robustus (Karling, 1931) | Aug-Sep 1984 |  | medium sand | Elmtree River.  Medium sand rich in detritus. | 
| Placorhynchus dimorphis Karling, 1947 | Aug-Sep 1984 |  |  | Salt marsh sediment with Spartina and Salicornia species. | 
| Baltoplana magna Karling, 1949 | Aug-Sep 1984 |  | medium-coarse sand | inner part of the Elmtree River. | 
| Vejdovskya pellucida (Schultze, 1851) | Aug-Sep, 1984 |  | medium-coarse sand | inner part of the Elmtree River.  Medium to coarse sand, very low salinity |