Acrostomum (Grube, 1840) (basis of record)
Adenorhagas Riser, 1990 (basis of record)
Adenorhagas aurantiafrons Riser, 1990 (basis of record)
Aegialonemertes Gibson, 1990 (basis of record)
Aegialonemertes chlorophthalma Gibson, 1990 (basis of record)
Aenigmanemertes Sundberg & Gibson, 1995 (basis of record)
Aenigmanemertes norenburgi Sundberg & Gibson, 1995 (basis of record)
Aetheolineus Senz, 1993 (additional source)
Aetheolineus pulcherrimus Senz, 1993 (additional source)
Aetheorhynchus Gibson, 1981 (basis of record)
Aetheorhynchus actites Gibson, 1981 (basis of record)
Africanemertes Stiasny-Wijnhoff, 1942 (basis of record)
Africanemertes ruetzleri Kirsteuer, 1965 (basis of record)
Africanemertes swakopmundi Stiasny-Wijnhoff, 1942 (basis of record)
Alaonemertes Stiasny-Wijnhoff, 1942 (basis of record)
Alaonemertes michaelseni Stiasny-Wijnhoff, 1942 (basis of record)
Alaxinus Gibson, Wickham & Kuris, 1990 (basis of record)
Alaxinus oclairi Gibson, Wickham & Kuris, 1990 (basis of record)
Albanemertes rovinjensis Senz, 1993 (additional source)
Algonemertes Corrêa, 1954 (basis of record)
Algonemertes alba Corrêa, 1954 (basis of record)
Ammonemertes Gibson, 1990 (basis of record)
Ammonemertes erseusi Gibson, 1990 (basis of record)
Amorphonemertes Cantell, 1998 (additional source)
Amorphonemertes kubergensis Cantell, 1998 (additional source)
Amphiporidae Oersted, 1844 (additional source)
Amphiporus Ehrenberg, 1831 (additional source)
Amphiporus (Naredopsis) Verrill, 1892 (basis of record)
Amphiporus (Ommatoplea) (basis of record)
Amphiporus allucens Bürger, 1895 (additional source)
Amphiporus angulatus (Müller, 1774) (additional source)
Amphiporus antifuscus Iwata, 1954 (basis of record)
Amphiporus bimaculatus Coe, 1901 accepted as Nipponnemertes bimaculata (Coe, 1901) (basis of record)
Amphiporus binarius Korotkevich, 1978 (basis of record)
Amphiporus binocellatus Senz, 1993 (additional source)
Amphiporus bioculatus sensu Verrill, 1892 (additional source)
Amphiporus bioculatus sensu Corrêa, 1958 accepted as Correanemertes bioculatus (Corrêa, 1958) (source of synonymy)
Amphiporus brunneus Griffin, 1898 (basis of record)
Amphiporus californicus Coe, 1905 (basis of record)
Amphiporus cruciatus Bürger, 1893 (basis of record)
Amphiporus delta Joubin, 1902 (basis of record)
Amphiporus dissimulans Riches, 1893 (additional source)
Amphiporus exilis Coe, 1901 (basis of record)
Amphiporus flavescens Coe, 1905 (basis of record)
Amphiporus formidabilis Griffin, 1898 (basis of record)
Amphiporus frontalis Verrill, 1892 (basis of record)
Amphiporus fulvus Coe, 1905 (basis of record)
Amphiporus fuscosparus Korotkevich, 1977 (basis of record)
Amphiporus gelatinosus Coe, 1905 (basis of record)
Amphiporus glandulosus Bürger, 1895 (additional source)
Amphiporus greenmani Montgomery, 1897 (basis of record)
Amphiporus heterosorus Verrill, 1892 (basis of record)
Amphiporus imparispinosus var. similis (source of synonymy)
Amphiporus incubator Joubin, 1914 (basis of record)
Amphiporus inexpectatus Wheeler, 1934 (basis of record)
Amphiporus lactifloreus (Johnston, 1828) (additional source)
Amphiporus lancetoformis Korotkevich, 1978 (basis of record)
Amphiporus langiaegeminus Bürger, 1895 (additional source)
Amphiporus lecointei Bürger, 1904 (basis of record)
Amphiporus leptacanthus Coe, 1905 (basis of record)
Amphiporus macracanthus Coe, 1905 (basis of record)
Amphiporus maculosus Coe, 1944 (basis of record)
Amphiporus mathai Joubin, 1905 (basis of record)
Amphiporus mesosorus Verrill, 1892 (basis of record)
Amphiporus mortonmilleri Gibson, 2002 (basis of record)
Amphiporus moseleyi Hubrecht, 1887 (basis of record)
Amphiporus multihastatus Joubin, 1910 (basis of record)
Amphiporus multisorus Verrill, 1892 (basis of record)
Amphiporus murmanicum Ushakov, 1928 (additional source)
Amphiporus musculus Iwata, 1954 (basis of record)
Amphiporus nadtochiae Chernyshev, 1998 (basis of record)
Amphiporus nebulosus Coe, 1901 (basis of record)
Amphiporus parvus Yamaoka, 1940 (basis of record)
Amphiporus paulinus Punnett, 1901 (basis of record)
Amphiporus perrieri Joubin, 1902 (basis of record)
Amphiporus peruvianus Coe, 1940 (basis of record)
Amphiporus quatrefagesi Stiasny-Wijnhoff, 1936 (basis of record)
Amphiporus racovitzai Bürger, 1904 (basis of record)
Amphiporus regius Iwata, 1954 (basis of record)
Amphiporus rubellus Coe, 1905 accepted as Nipponnemertes rubella Coe, 1905 (basis of record)
Amphiporus rubropunctus McCaul, 1963 (basis of record)
Amphiporus spinosissimus Bürger, 1893 (basis of record)
Amphiporus superbus (Stimpson, 1854) (additional source)
Amphiporus texanus Coe, 1951 (basis of record)
Amphiporus thallius Verrill, 1892 (basis of record)
Amphiporus tigrinus Coe, 1901 (basis of record)
Amphiporus vaillanti Joubin, 1902 (basis of record)
Annulonemertes minusculus Berg, 1985 (additional source)
Arctonemertes thori Friedrich, 1957 (additional source)
Arctonemertes ussuriensis Chernyshev, 1998 (basis of record)
Arenonemertes Friedrich, 1933 (additional source)
Arenonemertes arenicolus Hylbom, 1991 (basis of record)
Arenonemertes microps Friedrich, 1933 (additional source)
Arenonemertes minutus Friedrich, 1949 (basis of record)
Arhynchonemertes Riser, 1988 (additional source)
Arhynchonemertes axi Riser, 1988 (basis of record)
Armaueria Brinkmann, 1917 (additional source)
Armaueria rubra Brinkmann, 1917 (additional source)
Armaueriidae Brinkmann, 1917 (additional source)
Astemma Örsted, 1843 (basis of record)