Amphiporus (Intestinonemertes) arcticus (Punnett, 1901) accepted as Amphiporus arcticus Punnett, 1901
Amphiporus angulatus (Müller, 1774)
Amphiporus arcticus Punnett, 1901 (uncertain > taxon inquirendum )
Amphiporus bicolor Bürger, 1895 (uncertain > taxon inquirendum )
Amphiporus binarius Korotkevich, 1978
Amphiporus dissimulans Riches, 1893
Amphiporus groenlandicus Ørsted, 1843 (uncertain > nomen dubium )
Amphiporus imparispinosus Griffin, 1898
Amphiporus lactifloreus (Johnston, 1828)
Amphiporus lancetoformis Korotkevich, 1978
Amphiporus macracanthus Coe, 1905
Amphiporus murmanicum Ushakov, 1928
Amphiporus murmanicus accepted as Amphiporus murmanicum Ushakov, 1928
Amphiporus superbus (Stimpson, 1854)
Nareda aberrans accepted as Tetrastemma aberrans Coe, 1901
Nareda superba Stimpson, 1854 accepted as Amphiporus superbus (Stimpson, 1854)