Abyssonemertes kajiharai Chernyshev & Polyakova, 2017
Achoronemertes scoresbyi (Wheeler, 1934)
Acicula bioculata Renier, 1847 accepted as Acicula macula ([Renier], [1804])
Acicula macula ([Renier], [1804]) (uncertain > taxon inquirendum )
Acrostomum canescens (Leuckart, 1849) accepted as Amphiporus canescens (Leuckart, 1849)
Acrostomum stannii (Grube, 1840) accepted as Valdivianemertes stannii (Grube, 1840)
Acteonemertes bathamae Pantin, 1961
Adenorhagas aurantiafrons Riser, 1990
Aegialonemertes chlorophthalma Gibson, 1990
Aenigmanemertes norenburgi Sundberg & Gibson, 1995
Aetheolineus pulcherrimus Senz, 1993
Aetheorhynchus actites Gibson, 1981
Africanemertes ruetzleri Kirsteuer, 1965
Africanemertes rützleri Kirsteuer, 1965 accepted as Africanemertes ruetzleri Kirsteuer, 1965
Africanemertes swakopmundi Stiasny-Wijnhoff, 1942
Akrostomum stannii Grube, 1840 accepted as Valdivianemertes stannii (Grube, 1840)
Akrostomum valdiviae Bürger, 1909 accepted as Valdivianemertes valdiviae (Bürger, 1909)
Alaonemertes michaelseni Stiasny-Wijnhoff, 1942
Alardus caudatus Busch, 1851 accepted as Micrura fasciolata Ehrenberg, 1828
Alaxinus oclairi Gibson, Wickham & Kuris, 1990
Albanemertes rovinjensis Senz, 1993
Alexandronemertes ductor Chernyshev, 1992
Alexandronemertes mollis (Coe, 1926)
Algonemertes alba Corrêa, 1954
Alvinonemertes christianeae Sagorny, von Döhren, Rouse & Tilic, 2022
Alvinonemertes claudiae Sagorny, von Döhren, Rouse & Tilic, 2022
Alvinonemertes dagmarae Sagorny, von Döhren, Rouse & Tilic, 2022
Alvinonemertes dariae Sagorny, von Döhren, Rouse & Tilic, 2022
Alvinonemertes tatjanae Sagorny, von Döhren, Rouse & Tilic, 2022
Ammolineus gaimardi Senz, 2001
Ammonemertes erseusi Gibson, 1990
Amniclineus zhujiangensis Gibson & Qi, 1991
Amorphonemertes kubergensis Cantell, 1998
Amphinemertes caeca (Coe, 1901)
Amphiporella baltica Friedrich, 1940
Amphiporus (Intestinonemertes) appendiculatus Friedrich, 1957 accepted as Amphiporus appendiculatus Friedrich, 1957
Amphiporus (Intestinonemertes) arcticus (Punnett, 1901) accepted as Amphiporus arcticus Punnett, 1901
Amphiporus (Intestinonemertes) islandicus Friedrich, 1957 accepted as Amphiporus islandicus Friedrich, 1957
Amphiporus (Intestinonemertes) iwatai Friedrich, 1970 accepted as Amphiporus iwatai Friedrich, 1970
Amphiporus (Intestinonemertes) punnetti Friedrich, 1957 accepted as Amphiporus punnetti (Friedrich, 1957)
Amphiporus (Intestinonemertes) septentrionalis Friedrich, 1957 accepted as Amphiporus septentrionalis Friedrich, 1957
Amphiporus (Naredopsis) bioculatus Verrill, 1892 accepted as Amphiporus bioculatus sensu Verrill, 1892
Amphiporus (Ommatoplea) angulata (Müller, 1774) accepted as Amphiporus angulatus (Müller, 1774)
Amphiporus (Ommatoplea) superbus accepted as Amphiporus tetrasorus Verrill, 1892
Amphiporus abyssorum (uncertain > taxon inquirendum )
Amphiporus adriaticus (Ehrenberg, 1828) (uncertain > nomen dubium )
Amphiporus africanus Wheeler, 1940 accepted as Nipponnemertes africanus (Wheeler, 1940)
Amphiporus agilis (Verrill, 1874) accepted as Zygonemertes virescens (Verrill, 1879)
Amphiporus albicans Ehrenberg, 1831 (uncertain > nomen dubium )
Amphiporus allucens Bürger, 1895
Amphiporus amboiensis accepted as Cratenemertes amboinensis (Bürger, 1890)
Amphiporus amboinensis Bürger, 1890 accepted as Cratenemertes amboinensis (Bürger, 1890)
Amphiporus angulatus (Müller, 1774)
Amphiporus angulatus angulatus accepted as Amphiporus angulatus (Müller, 1774)
Amphiporus angulatus beringianus accepted as Amphiporus beringianus (Stimpson, 1857)
Amphiporus angulatus japonicus accepted as Amphiporus japonicus (Stimpson, 1857)
Amphiporus antifuscus Iwata, 1954
Amphiporus appendiculatus Friedrich, 1957 (uncertain > taxon inquirendum )
Amphiporus arcticus Punnett, 1901 (uncertain > taxon inquirendum )
Amphiporus arenarius Ushakov, 1927 accepted as Nipponnemertes arenaria (Ushakov, 1927)
Amphiporus atypicus Friedrich, 1935 (uncertain > taxon inquirendum )
Amphiporus bergendali Gering, 1912 accepted as Nipponnemertes pulcher (Johnston, 1837) accepted as Nipponnemertes pulchra (Johnston, 1837)
Amphiporus beringianus (Stimpson, 1857) (uncertain > nomen dubium )
Amphiporus bicolor Bürger, 1895 (uncertain > taxon inquirendum )
Amphiporus bicoloreus Korotkevich, 1977 (uncertain > nomen dubium )
Amphiporus bimaculatus Coe, 1901 accepted as Nipponnemertes bimaculata (Coe, 1901)
Amphiporus bimaculatus sensu Iwata, 1954 (uncertain > taxon inquirendum )
Amphiporus binarius Korotkevich, 1978
Amphiporus binocellatus Senz, 1993
Amphiporus bioculatus McIntosh, 1874 (uncertain > nomen dubium )
Amphiporus bioculatus sensu Corrêa, 1958 accepted as Correanemertes bioculatus (Corrêa, 1958)
Amphiporus bioculatus sensu Verrill, 1892 (uncertain )
Amphiporus brunneus Griffin, 1898
Amphiporus buergeri Isler, 1900 (uncertain > taxon inquirendum )
Amphiporus bürgeri Isler, 1900 accepted as Amphiporus buergeri Isler, 1900
Amphiporus caecus Verrill, 1892
Amphiporus californicus Coe, 1905
Amphiporus canescens (Leuckart, 1849) (uncertain > nomen dubium )
Amphiporus carinelloides Bürger, 1895 (uncertain > nomen dubium )
Amphiporus cephalonephridialis Friedrich, 1940 accepted as Communoporus cephalonephridialis (Friedrich, 1940)
Amphiporus cervicalis (Stimpson, 1857) (uncertain > nomen dubium )
Amphiporus commensalis Kyao, 1954 accepted as Asteronemertes commensalus (Kyao, 1954)
Amphiporus commensalus accepted as Asteronemertes commensalus (Kyao, 1954)
Amphiporus cordiceps (Jensen, 1878) accepted as Amphiporus cordiceps (Jensen, 1878) sensu Friedrich, 1933 accepted as Cyanophthalma cordiceps (Jensen, 1878) sensu Norenburg, 1986
Amphiporus cordiceps (Jensen, 1878) sensu Friedrich, 1933 accepted as Cyanophthalma cordiceps (Jensen, 1878) sensu Norenburg, 1986
Amphiporus cruciatus Bürger, 1893
Amphiporus cruentatus Verrill, 1879
Amphiporus delta Joubin, 1902
Amphiporus depressus (Stimpson, 1857) (uncertain > taxon inquirendum )
Amphiporus dissimulans Riches, 1893
Amphiporus dorsolineatus Korotkevich, 1977 (uncertain > nomen dubium )
Amphiporus drepanophoroides Griffin, 1898 accepted as Nipponnemertes drepanophoroides Griffin, 1898
Amphiporus dubius Hubrecht, 1879 (uncertain > nomen dubium )
Amphiporus elongatus Stephenson, 1911 accepted as Psammamphiporus elongatus (Stephenson, 1911)
Amphiporus exilis Coe, 1901
Amphiporus fabricii Levinsen, 1879 (uncertain > nomen dubium )
Amphiporus falklandicus Wheeler, 1934 accepted as Nipponnemertes pulcher (Johnston, 1837) accepted as Nipponnemertes pulchra (Johnston, 1837)
Amphiporus flavens Monastero, 1930 (uncertain > nomen dubium )
Amphiporus flavescens Coe, 1905
Amphiporus folcatus Korotkevich, 1977 (uncertain > nomen dubium )