| Coelogynopora faenofurca Sopott-Ehlers, 1992 | Jan 1991 | | sand | found exclusively in the burrows of Arenicola marina. 17 specimens. |
| Adenorhynchus balticus Meixner, 1938 | Sep 1970 | | sand | Isolated individuals. |
| Pseudaphanostoma brevicaudatum Dörjes, 1968 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Pseudaphanostoma pelophilum Dörjes, 1968 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Pseudaphanostoma psammophilum Dörjes, 1968 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Archaphanostoma agile (Jensen, 1878) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Praeaphanostoma chaetocaudatum Dörjes, 1968 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Anaperus tvaerminnensis (Luther, 1912) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Philachoerus johanni Dörjes, 1968 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Philactinoposthia saliens (Graff, 1882) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Mecynostomum auritum (Schultze, 1851) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Macrostomum pusillum Ax, 1951 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Microstomum papillosum Graff, 1882 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Microstomum bioculatum Faubel, 1984 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Archimonotresis limophila Meixner, 1938 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Promonotus schultzei Meixner, 1943 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Haloplanella minuta Luther, 1946 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Promesostoma gracilis Ax, 1951 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Promesostoma rostratum Ax, 1951 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Promesostoma karlingi Ehlers, 1974 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Promesostoma meixneri Ax, 1951 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Promesostoma marmoratum (Schultze, 1851) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Promesostoma caligulatum Ax, 1952 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Messoplana elegans Luther, 1948 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Ptychopera westbladi (Luther, 1943) Den Hartog, 1964 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Proxenetes quinquespinosus Ax, 1971 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Proxenetes quadrispinosus den Hartog, 1966 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Proxenetes intermedius den Hartog, 1966 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Proxenetes segmentatus den Hartog, 1966 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Proxenetes ampullatus Ax, 1971 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Proxenetes trigonus Ax, 1960 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Acrorhynchides robustus (Karling, 1931) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Scanorhynchus forcipatus Karling, 1955 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Danorhynchus duplostylis Karling, 1955 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Phonorhynchus helgolandicus (Metschnikow, 1865) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Zonorhynchus seminascatus Karling, 1956 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Zonorhynchus salinus Karling, 1952 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Placorhynchus octaculeatus Karling, 1931 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Placorhynchus dimorphis Karling, 1947 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Neognathorhynchus lobatus (Ax, 1952) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Psittacorhynchus verweyi den Hartog, 1968 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Bresslauilla relicta Reisinger, 1929 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Halammovortex macropharynx (Meixner, 1938) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Provortex tubiferus Luther, 1948 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Pogaina suecica (Luther, 1948) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Pseudograffilla arenicola Meixner, 1938 | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Baicalellia brevitubus (Luther, 1918) | Nov 1982 - Jun 1983 | | mud | inner part Königshafen, a sheltered marine bay near the isle of Sylt. |
| Antroposthia unipora Faubel, 1974 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Aphanostoma album Dörjes, 1968 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Praeaphanostoma rubrum Dörjes, 1968 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Praeconvoluta minor Faubel, 1974 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Pseudaphanostoma psammophilum Dörjes, 1968 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Pseudaphanostoma syltensis (Dörjes, 1968) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Atriofronta polyvacuola Dörjes, 1968 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Paraproporus rosettiformis Faubel, 1974 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Postmecynostomum pictum Dörjes, 1968 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Oligofilomorpha interstitiophilum Faubel, 1974 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Retronectes sterreri Faubel, 1976 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Bradynectes sterreri Rieger, 1971 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Macrostomum pusillum Ax, 1951 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Paromalostomum dubium (de Beauchamp, 1927) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Haplopharynx rostratus Meixner, 1938 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Archiloa unipunctata (Fabricius, 1826) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Promonotus schultzei Meixner, 1943 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Carenscoilia biforamen Sopott, 1972 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Cirrifera boletiformae Sopott, 1972 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Coelogynopora solifer Sopott, 1972 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Coelogynopora tenuis Meixner, 1938 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Vannuccia umbilica Sopott, 1972 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Polystyliphora filum Ax, 1958 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Nematoplana coelogynoporoides Meixner, 1938 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Archimonotresis limophila Meixner, 1938 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Bresslauilla relicta Reisinger, 1929 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Pseudograffilla arenicola Meixner, 1938 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Balgetia semicirculifera Karling, 1962 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Pogaina kinnei Ax, 1970 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Pogaina natans (Ax, 1951) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Pogaina suecica (Luther, 1948) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Provortex balticus (Schultze, 1851) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Provortex psammophilus Meixner, 1938 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Provortex tubiferus Luther, 1948 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Mariplanella frisia Ax & Heller, 1970 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Petaliella spiracauda Ehlers, 1974 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Proxenetes deltoides den Hartog, 1965 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Proxenetes quadrispinosus den Hartog, 1966 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Proxenetes quinquespinosus Ax, 1971 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Proxenetes trigonus Ax, 1960 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Aulopharynx aestuarius Ehlers, 1972 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Proceropharynx litoralis Ehlers, 1972 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Trisaccopharynx spiculatus Ehlers, 1972 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Moevenbergia oculofagi Armonies, 2017 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Promesostoma caligulatum Ax, 1952 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Promesostoma karlingi Ehlers, 1974 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Promesostoma marmoratum (Schultze, 1851) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Promesostoma rostratum Ax, 1951 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Scoliopharyngia arenicola Ehlers, Reise, & Armonies, 1995 | 1983-1984 | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Scoliopharyngia listensis Ehlers, Mueller & Franke, 1994 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Tvaerminnea direceptacula Ehlers, Mueller & Franke, 1994 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Psammorhynchus tubulipenis Meixner, 1938 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Acrorhynchides robustus (Karling, 1931) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Gyratricella attemsi (Graff, 1913) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Gyratrix hermaphroditus Ehrenberg, 1831 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Limipolycystis curvitubo Schilke, 1970 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Typhlopolycystis coeca Karling, 1956 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Cicerina brevicirrus Meixner, 1928 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Zonorhynchus seminascatus Karling, 1956 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Psittacorhynchus verweyi den Hartog, 1968 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Amphirhynchus caudatus Schilke, 1970 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Neoschizorhynchus parvorostro Ax & Heller, 1970 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Proschizorhynchus triductibus Schilke, 1970 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Proschizorhynchella bivaginata (Schilke, 1970) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. [author cites Proschizorhyncus bivaginatus] |
| Schizochilus choriurus Boaden, 1963 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Schizorhynchoides spirostylus Boaden, 1963 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Thylacorhynchus conglobatus Meixner, 1928 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Cheliplana boadeni Schilke, 1970 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Cheliplanilla caudata Meixner, 1938 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Karkinorhynchides purpureus (Schilke, 1970) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. [authors list as Karkinorhychus purpureus.] |
| Cheliplana remanei (Meixner, 1928) | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. |
| Diascorhynchus rubrus Boaden, 1963 | 1985 or earlier | | sand | deep sulfide layer at depths of more than 5 cm below the sediment surface. Species found at least 3 times. More than 50 individuals. |
| Zonorhynchus pipettiferus Armonies & Hellwig, 1987 | 1982-1983 | | | Königshafen, Grenzgebiet Watt/Salzwiese. |
| Phonorhynchus bitubatus Meixner, 1938 | 1987 or earlier | | | Sylt. Salzwiesengraben im Königshafen. |