| Typhlopolycystis mediterranea Brunet, 1965 | prior to 1970 | intertidal | sand | coast of Sylt. |
| Psammorhynchus tubulipenis Meixner, 1938 | 1956 or earlier | | coarse sand, gravel | frequently on the slope where waves are breaking. |
| Provortex karlingi Ax, 1951 | 1951 or earlier | | | |
| Carenscoilia bidentata Sopott, 1972 | 1985 or earlier | | | sediment samples of beaches of Sylt. |
| Archilopsis spinosa (Jensen, 1878) | Sep 1985 | | | |
| Archilopsis spinosa (Jensen, 1878) | Jun 1985 | | | Collector Noldt. |
| Archilopsis unipunctata (Fabricius, 1826) | Feb 1984 | | | Collector Noldt. |
| Marirhynchus longasaeta Schilke, 1970 | 1970 or earlier | | | North Sea. Isle of Sylt. |
| Notocaryoplanella glandulosa (Ax, 1951) | 1951 or earlier | | | Deutsche Nordseeküste. Sylt. |
| Subulagera rubra Martens & Schockaert, 1981 | Aug 1974 | | | eu and sublittoral, Sylt, many localities. (leg. Dr. U. Ehlers, Göttingen). |
| Messoplana falcata falcata (Ax, 1953) | 1974 or earlier | | | Nordsee (Sylt, Amrum), Kieler Bucht (Schilksee, Bülk), Mittelmeer (Sizilien), Marmara Meer (Florya, Prinzeninsel Heybeli), Schwarzes Meer (Sile). |
| Anthopharynx vaginatus Karling, 1940 | 1987 or earlier | | | Sylt. Anthopharynx-Funde in Salzwiesen und Watt, publiziert unter dem Namen Anthopharynx sacculipenis Ehlers, 1972. A. vaginatus und A. sacculipenis sind ökologisch und morphologisch nicht befriedigend zu trennen. |
| Placorhynchus octaculeatus octaculeatus Karling, 1931 | 1970 or earlier | | | Sylt. Sanstrände am Ostufer der Insel. |
| Proschizorhynchus gullmarensis Karling, 1950 | 1970 or earlier | | | ...ist an der Nordsee (Sylt, Amrum) und in der westlichen Ostsee (Kieler Bucht) ein spezifischer Bewohner von Grobsand-Kies an lotischen Sandstränden. |
| Provortex affinis (Jensen, 1878) | 1987 or earlier | | | Marine Art mit zahlreichen Angaben aus dem euhalinen Milieu nordatlantischer Küsten bis zu jüngsten Funden von Populationen im Sandwatt der Nordseeinsel Sylt. |
| Balgetia semicirculifera Karling, 1962 | 1973 or earlier | | | Im Sandstrand von Sylt mutmasslich mit 2 Generationen pro Jahr. |
| Archimonotresis limophila Meixner, 1938 | 1956 or earlier | | | Nordsee: Sylt. (Ax 1956) |
| Limipolycystis curvitubo Schilke, 1970 | 1966-1968 | | | Eulitoral. |
| Acrorhynchides robustus (Karling, 1931) | 1966-1968 | | | Eulitoral. |
| Cicerina brevicirrus Meixner, 1928 | 1938 or earlier | | | Amrum-Sylt: Farbstreifensandwatt |
| Placorhynchus octaculeatus octaculeatus Karling, 1931 | 1938 or earlier | | | Farbstreifensandwatt. |
| Nesite ptychoperoides Armonies, 2017 | 2017 or earlier | | | |
| Archimonocelis crucifera Martens & Curini-Galletti, 1993 | 2017 or earlier | | | |
| Bradynectes sterreri Rieger, 1971 | 2017 or earlier | | | |
| Coelogynopora multispina Armonies, 2017 | 2017 or earlier | | | |
| Coronhelmis inaequalis Armonies, 2017 | 2017 or earlier | | | |
| Diascorhynchus falconis Armonies, 2017 | 2017 or earlier | | | |
| Haloplanella magnarhabdita Armonies, 2017 | 2017 or earlier | | | |
| Haloplanella spiralis Armonies, 2017 | 2017 or earlier | | | |
| Haplovejdovskya scilliensis Faubel & Warwick, 2005 | 2017 or earlier | | | |
| Messoplana helgolandica Ax, 1971 | 2017 or earlier | | | |
| Moevenbergia oculofagi Armonies, 2017 | 2017 or earlier | | | |
| Promesostoma minutum Ax, 1956 | 2017 or earlier | | | |
| Proxenetes inflatus den Hartog, 1966 | 2017 or earlier | | | |
| Pseudostomum gracilis Westblad, 1955 | 2017 or earlier | | | |