| Petaliella spiracauda Ehlers, 1974 | May 1951 | 1.5 m | sand | 50 m from the bank.  (leg. Prof. Dr. P. Ax) | 
| Lonchoplanella axi Ehlers, 1974 | May 1951 | 1.5 m | medium, coarse sand | 50 m from the bank.  (Prof. Dr. P. Ax).  Numerous sectioned specimens. | 
| Adenorhynchus balticus Meixner, 1938 | May 1951 | 1.5 m | medium to coarse sand | Hohwachter Bay near Weissenhaus.  50 m east of the river bank zone | 
| Litucivis serpens Ax & Heller, 1970 | Sep 1951 | 2.0 m | medium to coarse sand | Hohwachter Bay near Weissenhaus.  50 m east of the river bank zone.  leg. P. Ax. | 
| Baicalellia nana (Ax, 2008) | 1950-1959 | 2-15 m | coarse sand, gravel | Bisher nur im polyhalinen Brackwasser der Kieler Bucht nachgewiesen.  Grobsand-Kies vor Schilksee, Bülk und Weissenhaus, vom Stoller Grund, Vodrups-Flach und Veisnaes-Flach in 2-15 m Wassertiefe (1950-1959). | 
| Carcharodorhynchus subterraneus Meixner, 1938 | 1966-1968 |  |  |  | 
| Baltoplana magna Karling, 1949 | 1966-1968 |  |  | Wasserlinie |