| 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. |