• Leda (Portlandia) Mörch, 1857 accepted as Portlandia Mörch, 1857
• Leda (Portlandia) collinsoni Dall, 1919 accepted as Portlandia arctica (J. E. Gray, 1824)
• Leda (Portlandia) tenuis (R. A. Philippi, 1836) accepted as Yoldiella philippiana (Nyst, 1845)
• Nuculana (Portlandia) Mörch, 1857 accepted as Portlandia Mörch, 1857
• Portlandia Mörch, 1857
• Portlandia (Dyolia) La Perna & Ragaini, 2008 represented as Portlandia Mörch, 1857
• Portlandia (Dyolia) mendax (Meneghini, 1871) † represented as Portlandia mendax (Meneghini, 1871) †
• Portlandia (Hataiyoldia) Kamada, 1962 † accepted as Megayoldia (Hataiyoldia) Kamada, 1962 † represented as Megayoldia A. E. Verrill & K. J. Bush, 1897
• Portlandia (Hataiyoldia) tokunagai (Yokoyama, 1925) † accepted as Megayoldia tokunagai (Yokoyama, 1925) †
• Portlandia (Joldiella) A. E. Verrill & K. J. Bush, 1897 accepted as Yoldiella A. E. Verrill & K. J. Bush, 1897
• Portlandia (Joldiella) intermedia (M. Sars, 1865) accepted as Yoldiella intermedia (M. Sars, 1865)
• Portlandia (Megayoldia) A. E. Verrill & K. J. Bush, 1897 accepted as Megayoldia A. E. Verrill & K. J. Bush, 1897
• Portlandia (Megayoldia) gratiosa (Yokoyama, 1923) † (uncertain > unassessed)
• Portlandia (Megayoldia) thraciaeformis (Storer, 1838) accepted as Megayoldia thraciaeformis (Storer, 1838)
• Portlandia (Portlandella) R. B. Stewart, 1930 † accepted as Portlandia Mörch, 1857
• Portlandia (Portlandella) lischkei (J. A. Smith, 1885) accepted as Megayoldia lischkei (E. A. Smith, 1885)
• Portlandia (Portlandia) Mörch, 1857 represented as Portlandia Mörch, 1857
• Portlandia (Portlandia) arctica (J. E. Gray, 1824) accepted as Portlandia arctica (J. E. Gray, 1824)
• Portlandia (Portlandia) arctica var. siliqua (Reeve, 1855) accepted as Portlandia arctica (J. E. Gray, 1824)
• Portlandia (Portlandia) arcuata (Pronina, 1969) † represented as Portlandia arcuata (Pronina, 1969) †
• Portlandia (Portlandia) impressa Perri, 1975 † accepted as Portlandia mendax (Meneghini, 1871) †
• Portlandia (Portlandia) parceplicata (Barnard, 1964) represented as Portlandia parceplicata (Barnard, 1964) accepted as Scissileda parceplicata (Barnard, 1964)
• Portlandia (Portlandia) toyamaensis (Kuroda, 1929) accepted as Megayoldia toyamaensis (Kuroda, 1929)
• Portlandia (Taiwannuculana) Okutani & Lan, 1999 accepted as Taiwannuculana Okutani & Lan, 1999
• Portlandia (Taiwannuculana) exotica Okutani & Lan, 1999 accepted as Taiwannuculana exotica (Okutani & Lan, 1999)
• Portlandia (Yoldiella) A. E. Verrill & K. J. Bush, 1897 accepted as Yoldiella A. E. Verrill & K. J. Bush, 1897
• Portlandia (Yoldiella) annenkovae Gorbunov, 1946 accepted as Yoldiella annenkovae (Gorbunov, 1946)
• Portlandia (Yoldiella) intermedia (M. Sars, 1865) accepted as Yoldiella intermedia (M. Sars, 1865)
• Portlandia (Yoldiella) subcircularis Odhner, 1960 accepted as Yoldiella subcircularis (Odhner, 1960)
• Portlandia abyssicola Knudsen, 1970 accepted as Yoldiella abyssicola (Knudsen, 1970)
• Portlandia aestuariorum (Mosevich, 1928)
• Portlandia annenkovae Gorbunov, 1946 accepted as Yoldiella annenkovae (Gorbunov, 1946)
• Portlandia arctica (J. E. Gray, 1824)
• Portlandia arctica arctica (J. E. Gray, 1824) accepted as Portlandia arctica (J. E. Gray, 1824)
• Portlandia arctica siliqua (Reeve, 1855) accepted as Portlandia arctica (J. E. Gray, 1824)
• Portlandia arctica typica Filatova, 1951 accepted as Portlandia arctica (J. E. Gray, 1824)
• Portlandia arcuata (Pronina, 1969) †
• Portlandia atkinsoni R. M. Johnston, 1880 † accepted as Pronucula atkinsoni (R. M. Johnston, 1880) †
• Portlandia carolimartini Beets, 1984 †
• Portlandia dalli A. Krause, 1885 accepted as Megayoldia thraciaeformis (Storer, 1838)
• Portlandia dubia Naumov & Fedyakov, 1994 accepted as Portlandia arctica (J. E. Gray, 1824)
• Portlandia exotica Okutani & Lan, 1999 accepted as Taiwannuculana exotica (Okutani & Lan, 1999)
• Portlandia fora J. A. Allen, H. L. Sanders & F. J. Hannah, 1995 accepted as Yoldiella fora (J. A. Allen, H. L. Sanders & F. Hannah, 1995)
• Portlandia fraterna (A. E. Verrill & K. J. Bush, 1898) accepted as Yoldiella nana (M. Sars, 1865)
• Portlandia frigida (Torell, 1859) accepted as Yoldiella frigida (Torell, 1859)
• Portlandia glacialis (J. E. Gray, 1825)
• Portlandia intermedia (M. Sars, 1865) accepted as Yoldiella intermedia (M. Sars, 1865)
• Portlandia isonota (E. von Martens, 1881)
• Portlandia japonica (A. Adams & Reeve, 1850) accepted as Megayoldia japonica (A. Adams & Reeve, 1850)
• Portlandia jeffreysi (Hidalgo, 1877) accepted as Yoldiella jeffreysi (Hidalgo, 1877)
• Portlandia kolthoffi Hägg, 1904 accepted as Katadesmia kolthoffi (Hägg, 1904)
• Portlandia lenticula (Møller, 1842) accepted as Yoldiella lenticula (Møller, 1842)
• Portlandia lenticula var. arctica Mesyatsev, 1931 accepted as Yoldiella lenticula (Møller, 1842)
• Portlandia lenticula var. polaris Mesyatsev, 1931 accepted as Yoldiella lenticula (Møller, 1842)
• Portlandia lepidula (A. Adams, 1856) accepted as Orthoyoldia lepidula (A. Adams, 1856)
• Portlandia lischkei (E. A. Smith, 1885) accepted as Megayoldia lischkei (E. A. Smith, 1885)
• Portlandia mendax (Meneghini, 1871) †
• Portlandia minuta J. A. Allen, H. L. Sanders & F. J. Hannah, 1995 accepted as Yoldiella minuta (J. A. Allen, H. L. Sanders & F. Hannah, 1995)
• Portlandia nigromaculata Okutani, 1983 accepted as Taiwannuculana nigromaculata (Okutani, 1983)
• Portlandia pachia (A. E. Verrill & K. J. Bush, 1898) accepted as Yoldiella pachia A. E. Verrill & K. J. Bush, 1898
• Portlandia parceplicata (Barnard, 1964) accepted as Scissileda parceplicata (Barnard, 1964)
• Portlandia persei Messjatsev, 1931 accepted as Yoldiella propinqua (Leche, 1878)
• Portlandia philippiana (Nyst, 1845) accepted as Yoldiella philippiana (Nyst, 1845)
• Portlandia pygmaea (Münster, 1837) accepted as Yoldiella pygmaea (Münster, 1837) †
• Portlandia siliqua (A. Adams, 1856) (uncertain > taxon inquirendum)
• Portlandia subaequilatera (Jeffreys, 1879) accepted as Yoldiella lucida (Lovén, 1846)
• Portlandia subaequilatera (Jeffreys, 1879) sensu Ockelmann, 1959 accepted as Yoldiella propinqua (Leche, 1878)
• Portlandia subangulata (A. E. Verrill & K. J. Bush, 1898) accepted as Yoldiella lucida (Lovén, 1846)
• Portlandia subcircularis Odhner, 1960 accepted as Yoldiella subcircularis (Odhner, 1960)
• Portlandia sulcifera (Reeve, 1855)