Acrostomum stannii (Grube, 1840) accepted as Valdivianemertes stannii (Grube, 1840) (source of synonymy)
Aetheolineus Senz, 1993 (basis of record)
Aetheolineus pulcherrimus Senz, 1993 (basis of record)
Albanemertes rovinjensis Senz, 1993 (basis of record)
Amorphonemertes Cantell, 1998 (basis of record)
Amorphonemertes kubergensis Cantell, 1998 (basis of record)
Amphiporidae Örsted, 1843 (basis of record)
Amphiporus Ehrenberg, 1831 (basis of record)
Amphiporus adriaticus (Ehrenberg, 1828) (basis of record)
Amphiporus allucens Bürger, 1895 (basis of record)
Amphiporus angulatus (Müller, 1774) (basis of record)
Amphiporus atypicus Friedrich, 1935 (basis of record)
Amphiporus bicolor Bürger, 1895 (basis of record)
Amphiporus binocellatus Senz, 1993 (basis of record)
Amphiporus bioculatus sensu Verrill, 1892 (basis of record)
Amphiporus canescens (Leuckart, 1849) (basis of record)
Amphiporus dissimulans Riches, 1893 (basis of record)
Amphiporus glandulosus Bürger, 1895 (basis of record)
Amphiporus grubei (Diesing, 1850) (basis of record)
Amphiporus korschelti Friedrich, 1939 (basis of record)
Amphiporus lactifloreus (Johnston, 1828) (basis of record)
Amphiporus marmoratus Hubrecht, 1879 (basis of record)
Amphiporus multioculatus (Kölliker, 1845) (basis of record)
Amphiporus murmanicum Ushakov, 1928 (basis of record)
Amphiporus nigrostriatus Timofeev, 1911 (basis of record)
Amphiporus pellucidus (Örsted, 1843) (basis of record)
Amphiporus roseus (Müller, 1774) (basis of record)
Amphiporus superbus (Girard in Stimpson, 1854) (basis of record)
Annulonemertes minusculus Berg, 1985 accepted as Annulonemertes minuscula Berg, 1985 (basis of record)
Arctonemertes Friedrich, 1957 (basis of record)
Arctonemertes thori Friedrich, 1957 (basis of record)
Arenonemertes Friedrich, 1933 (basis of record)
Arenonemertes arenicola Hylbom, 1991 accepted as Arenonemertes arenicolus Hylbom, 1991 (basis of record)
Arenonemertes microps Friedrich, 1933 (basis of record)
Arenonemertes minuta Friedrich, 1949 accepted as Arenonemertes minutus Friedrich, 1949 (basis of record)
Armaueria Brinkmann, 1917 (basis of record)
Armaueria rubra Brinkmann, 1917 (basis of record)
Armaueriidae Brinkmann, 1917 (basis of record)
Atrionemertes Senz, 1993 (basis of record)
Atrionemertes greenlandica Senz, 1993 (basis of record)
Balaenanemertes Bürger, 1909 (basis of record)
Balaenanemertes chavesi (Joubin, 1906) (basis of record)
Balaenanemertes grandis Brinkmann, 1917 (basis of record)
Balaenanemertes hjorti Brinkmann, 1917 (basis of record)
Balaenanemertes lata Brinkmann, 1917 (basis of record)
Balaenanemertes lobata (Joubin, 1906) (basis of record)
Balaenanemertes musculocaudata Brinkmann, 1917 (basis of record)
Baseodiscus Diesing, 1850 (basis of record)
Baseodiscus abyssorum (Joubin, 1902) (basis of record)
Baseodiscus delineatus (Delle Chiaje, 1822) (basis of record)
Baseodiscus filholi (Joubin, 1902) (basis of record)
Baseodiscus minor (Hubrecht, 1879) (basis of record)
Bathynectes hubrechti accepted as Protopelagonemertes hubrechti (Brinkmann, 1917) (source of synonymy)
Bdellonemertea accepted as Malacobdellidae Blanchard, 1847 (basis of record)
Bdellonemertini accepted as Malacobdellidae Blanchard, 1847 (basis of record)
Borlasia echinoderma Marion, 1873 accepted as Emplectonema echinoderma (Marion, 1873) (source of synonymy)
Borlasia tricuspida accepted as Notospermus tricuspidatus (Quoy & Gaimard, 1833) (source of synonymy)
Brinkmannia Stiasny-Wijnhoff, 1926 (basis of record)
Brinkmannia mediterranea Stiasny-Wijnhoff, 1926 (basis of record)
Brinkmanniidae Stiasny-Wijnhoff (basis of record)
Buergeriella Brinkmann, 1917 (basis of record)
Buergeriella notabilis Brinkmann, 1917 (basis of record)
Buergeriellidae Brinkmann, 1917 (basis of record)
Callinera Bergendal, 1900 (basis of record)
Callinera buergeri Bergendal, 1900 (basis of record)
Callinera grandis Bergendal, 1903 (basis of record)
Callinera monensis Rogers, Gibson & Thorpe, 1992 (basis of record)
Callinera zhirmunskyi Chernyshev, 2002 (basis of record)
Calonemertes Coe, 1945 (basis of record)
Calonemertes hardyi (Wheeler, 1934) (basis of record)
Carcinonemertes Coe, 1902 (basis of record)
Carcinonemertidae Sumner, Osburn & Cole, 1913 (basis of record)
Carinesta Punnett, 1900 (basis of record)
Carinesta anglica Wijnhoff, 1912 (basis of record)
Carinina Hubrecht, 1885 (basis of record)
Carinina arenaria Hylbom, 1957 (basis of record)
Carinina atavia (Bergendal, 1902) (basis of record)
Carinina buddenbrocki (Friedrich, 1935) (basis of record)
Carinina burgeri Joubin, 1902 (basis of record)
Carinina coei Hylbom, 1957 (basis of record)
Carinina heterosoma Müller, 1965 (basis of record)
Carinina poseidoni Friedrich, 1935 (basis of record)
Carinina remanei (Nawitzki, 1931) (basis of record)
Carinina wijnhoffae Kulikova, 1984 (basis of record)
Carinoma Oudemans, 1885 (basis of record)
Carinoma armandi (McIntosh, 1875) (basis of record)
Carinomidae Bergendal, 1900 (basis of record)
Cephalothricidae accepted as Cephalotrichidae McIntosh, 1874 (basis of record)
Cephalothrix Örsted, 1843 (basis of record)
Cephalothrix arenaria Hylbom, 1957 (basis of record)
Cephalothrix atlantica Gerner, 1969 (basis of record)
Cephalothrix bipunctata Bürger, 1892 (basis of record)
Cephalothrix buergeri Wijnhoff, 1913 (basis of record)
Cephalothrix germanica Gerner, 1969 (basis of record)
Cephalothrix lactea Senz, 1993 (basis of record)
Cephalothrix linearis (Rathke, 1799) (basis of record)
Cephalothrix mediterranea Gerner, 1969 (basis of record)
Cephalothrix paragermanica Senz, 1993 (basis of record)
Cephalothrix rufifrons (Johnston, 1837) (basis of record)
Cephalotrichella Wijnhoff, 1913 (basis of record)

Arctic Ocean for Amphiporus angulatus (Müller, 1774) 
Arctic Ocean for Amphiporus bicolor Bürger, 1895 
Arctic Ocean for Amphiporus fabricii Levinsen, 1879 
Arctic Ocean for Amphiporus groenlandicus Ørsted, 1843 
Arctic Ocean for Amphiporus murmanicum Ushakov, 1928 
Arctic Ocean for Carinina wijnhoffae Kulikova, 1984 
Arctic Ocean for Cerebratulus barentsi Bürger, 1895 
Arctic Ocean for Cerebratulus borealis (Diesing, 1862) 
Arctic Ocean for Cerebratulus brevis Ushakov, 1926 
Arctic Ocean for Cerebratulus greenlandicus Punnett, 1901 
Arctic Ocean for Cerebratulus niveus (Punnett, 1903) 
Arctic Ocean for Cerebratulus norvegicus Punnett, 1903 
Arctic Ocean for Cerebratulus rigidus Isler, 1900 
Arctic Ocean for Cerebratulus zachsi Ushakov, 1926 
Arctic Ocean for Cryptonemertes actinophila (Bürger, 1904) 
Arctic Ocean for Dinonemertes alberti (Joubin, 1906) 
Arctic Ocean for Dinonemertes arctica Korotkevich, 1977 
Arctic Ocean for Emplectonema derjugini Ushakov, 1928 
Arctic Ocean for Gurjanovella littoralis Ushakov, 1926 
Arctic Ocean for Gurjanovella murmanicum Ushakov, 1926 
Arctic Ocean for Lineus fischeri Senz, 1997 
Arctic Ocean for Lineus gurjanovae Korotkevich, 1977 
Arctic Ocean for Lineus kolaensis Ushakov, 1928 
Arctic Ocean for Lineus marisalbi Ushakov, 1926 
Arctic Ocean for Lineus sainthilairi Ushakov, 1926 
Arctic Ocean for Lineus uschakovi Korotkevich, 1977 
Arctic Ocean for Lineus viridis (Müller, 1774) 
Arctic Ocean for Micrura lithotamnii Ushakov, 1928 
Arctic Ocean for Micrura varicolor Punnett, 1903 
Arctic Ocean for Nipponnemertes danae (Friedrich, 1957) 
Arctic Ocean for Nipponnemertes magna (Punnett, 1903) 
Arctic Ocean for Tetrastemma arctica Ushakov, 1926 
Arctic Ocean for Tetrastemma candidum (Müller, 1774) 
Arctic Ocean for Tetrastemma cassidens (Marenzeller, 1886) 
Arctic Ocean for Tetrastemma laminariae Ushakov, 1928 
Arctic Ocean for Tubulanus groenlandicus (Bergendal, 1902) 
Baltic sea for Amphiporus korschelti Friedrich, 1939 
Baltic sea for Arenonemertes microps Friedrich, 1933 
Baltic sea for Arenonemertes minuta Friedrich, 1949 
Baltic sea for Carinina buddenbrocki (Friedrich, 1935) 
Baltic sea for Carinina remanei (Nawitzki, 1931) 
Baltic sea for Communoporus cephalonephridialis (Friedrich, 1939) 
Baltic sea for Communoporus hagmeieri (Friedrich, 1939) 
Baltic sea for Communoporus rhynchocoelomicus (Friedrich, 1939) 
Baltic sea for Cyanophthalma obscura (Schultze, 1851) 
Baltic sea for Lineus pseudoruber (Friedrich, 1935) 
Baltic sea for Micrura baltica Cantell, 1975 
Baltic sea for Nemertellina canea Friedrich, 1935 
Baltic sea for Nemertellina minuta Friedrich, 1935 
Baltic sea for Nemertellina oculata Friedrich, 1935 
Baltic sea for Nemertellopsis macrodasys Friedrich, 1935 
Baltic sea for Nemertellopsis typica Friedrich, 1936 
Baltic sea for Oerstedia laminariae Friedrich, 1936 
Baltic sea for Oerstedia wijnhoffae Friedrich, 1935 
Baltic sea for Paraminutanemertes minutus (Friedrich, 1935) 
Baltic sea for Procephalothrix kiliensis Friedrich, 1935 
Baltic sea for Proneurotes baltica Friedrich, 1939 
Baltic sea for Prosorhochmus subterraneus Friedrich, 1949 
Baltic sea for Prostomatella arenicola Friedrich, 1935 
Baltic sea for Sacconemertes arenosa Karling, 1933 
Baltic sea for Tetrastemma aseptata (Friedrich, 1935) 
Baltic sea for Tetrastemma brunnea (Friedrich, 1935) 
Black Sea for Arenonemertes microps Friedrich, 1933 
Black Sea for Carinina heterosoma Müller, 1965 
Black Sea for Cerebratulus bivittatus Uljanin, 1870 
Black Sea for Cerebratulus ventrosulcatus Bürger, 1892 
Black Sea for Cyanophthalma obscura (Schultze, 1851) 
Black Sea for Leucocephalonemertes aurantiaca (Grube, 1855) 
Black Sea for Mixolineus tauricus Müller & Scripcariu, 1971 
Black Sea for Ototyphlonemertes antipai Müller, 1968 
Black Sea for Ototyphlonemertes aurita (Ulyanina, 1870) 
Black Sea for Pontolineus arenarius Müller & Scripcariu, 1964 
Black Sea for Pussylineus gabriellae Corrêa, 1956 
Black Sea for Tetrastemma bacescui Müller, 1962 
Black Sea for Zygonemertes maslovskyi (Czerniavski, 1880) 
European waters (ERMS scope) for Aetheolineus pulcherrimus Senz, 1993 
European waters (ERMS scope) for Albanemertes rovinjensis Senz, 1993 
European waters (ERMS scope) for Amorphonemertes kubergensis Cantell, 1998 
European waters (ERMS scope) for Amphiporella baltica Friedrich, 1939 
European waters (ERMS scope) for Amphiporus adriaticus (Ehrenberg, 1828) 
European waters (ERMS scope) for Amphiporus allucens Bürger, 1895 
European waters (ERMS scope) for Amphiporus angulatus (Müller, 1774) 
European waters (ERMS scope) for Amphiporus appendiculatus Friedrich, 1957 
European waters (ERMS scope) for Amphiporus arcticus Punnett, 1901 
European waters (ERMS scope) for Amphiporus atypicus Friedrich, 1935 
European waters (ERMS scope) for Amphiporus bicolor Bürger, 1895 
European waters (ERMS scope) for Amphiporus binocellatus Senz, 1993 
European waters (ERMS scope) for Amphiporus bioculatus sensu Verrill, 1892 
European waters (ERMS scope) for Amphiporus canescens (Leuckart, 1849) 
European waters (ERMS scope) for Amphiporus carinelloides Bürger, 1895 
European waters (ERMS scope) for Amphiporus dissimulans Riches, 1893 
European waters (ERMS scope) for Amphiporus dubius Hubrecht, 1879 
European waters (ERMS scope) for Amphiporus fabricii Levinsen, 1879 
European waters (ERMS scope) for Amphiporus flavens Monastero, 1930 
European waters (ERMS scope) for Amphiporus giardinae Monastero, 1930 
European waters (ERMS scope) for Amphiporus glandulosus Bürger, 1895 
European waters (ERMS scope) for Amphiporus groenlandicus Ørsted, 1843 
European waters (ERMS scope) for Amphiporus grubei (Diesing, 1850) 
European waters (ERMS scope) for Amphiporus hastatus McIntosh, 1874 
European waters (ERMS scope) for Amphiporus islandicus Friedrich, 1957 

 Authority

 for Tetrastemma robertianae McIntosh, 1874

Also mentioned as McIntosh, 1873/74 [details]

 Ecology

 for Carcinonemertes carcinophila (Kölliker, 1845)

on gills and eggs of crabs [details]

 Ecology

 for Emplectonema spongicola (Bergendal, 1903)

in sponges [details]

 Ecology

 for Gononemertes parasita Bergendal, 1900

in tunicates [details]

 Ecology

 for Malacobdella grossa (Müller, 1776)

in mantle cavity of bivalve molluscs [details]

 Ecology

 for Tetrastemma marionis Joubin, 1890

in ascidians [details]

 Ecology

 for Tetrastemma quadristriatum Langerhans, 1880

in ascidians [details]

 Ecology

 for Tetrastemma vittigerum (Bürger, 1904)

in ascidians [details]

 Habitat

 for Amphiporella baltica Friedrich, 1939

interstitial [details]

 Habitat

 for Balaenanemertes lobata (Joubin, 1906)

meso-bathypelagic [details]

 Habitat

 for Prosorhochmus claparedii Keferstein, 1862

mostly interstitial [details]

 Remark

 for Cryptonemertes actinophila (Bürger, 1904)

under pedal disc of sea anemones [details]

 Synonymy

 for Drepanophorus crassus nisidensis

Drepanophorus crassus nisidensis (partim) = Paradrepanophorus crassus [details]

 Synonymy

 for Tetrastemma stimpsoni Chernyshev, 1992

Prostoma stigmatum (partim) = Tetrastemma stimpsoni Tetrastemma stigmatum sensu Kulikova, 1988 = Tetrastemma ... [details]

 Taxonomy

 for Carinesta anglica Wijnhoff, 1912

Dubious species [details]

 Taxonomy

 for Cerebratulus barentsi Bürger, 1895

Dubious species [details]

 Taxonomy

 for Cerebratulus bivittatus Uljanin, 1870

Dubious species [details]

 Taxonomy

 for Cerebratulus croceus Grube, 1864

Dubious species [details]

 Taxonomy

 for Cerebratulus depressus Quatrefages, 1846

Dubious species [details]

 Taxonomy

 for Cerebratulus erythrorochma Joubin, 1902

Dubious species [details]

 Taxonomy

 for Emplectonema duoni (Joubin, 1890)

Dubious species [details]

 Taxonomy

 for Emplectonema marioni (Hubrecht, 1879)

Dubious species [details]

 Taxonomy

 for Lineus hubrechti (Langerhans, 1880)

Dubious species [details]

 Taxonomy

 for Micrura albifrons Timofeev, 1911

Dubious species [details]

 Taxonomy

 for Micrura rockalliensis Dollfus, 1924

Dubious species [details]

 Taxonomy

 for Micrura scotica Stephenson, 1911

Dubious species [details]

 Taxonomy

 for Nemertopsis capitulata Timofeev, 1911

Dubious species [details]

 Taxonomy

 for Nemertoscolex parasiticus Greeff, 1879

probably endoparasitic in echiuroids [details]

 Taxonomy

 for Oerstedia immutabilis (Riches, 1893)

Dubious species [details]

 Taxonomy

 for Oerstedia nigra (Riches, 1893)

Dubious species [details]

 Validity

 for Tetrastemma albicollis Ushakov, 1928

Uncertainty about the Genusname [details]