Lyonsiidae Fischer, 1887
Hiatella antarctica (Philippi, 1845)
Hiatella meridionalis (d'Orbigny, 1846)
Lyonsia adriatica
Lyonsia alvarezii d'Orbigny, 1846
Lyonsia arcaeforme Martens, 1885
Lyonsia arcaeformis Martens, 1885
Lyonsia arenosa (Moller, 1842)
Lyonsia argentea Jeffreys, 1881
Lyonsia bracteata (Gould, 1850)
Lyonsia bulla Dall, 1881
Lyonsia californica Conrad, 1837
Lyonsia carbuloides
Lyonsia corruscans (Sacchi)
Lyonsia cucumerina Ivanova in Scarlato, 1981
Lyonsia floridana Conrad, 1849
Lyonsia formosa Jeffreys, 1881
Lyonsia gouldii Dall, 1915
Lyonsia granulifera A. E. Verrill & Bush, 1898
Lyonsia heberti
Lyonsia hyalina Conrad, 1831
Lyonsia kawamurai Habe, 1952
Lyonsia lucasana Bartsch & Rehder, 1939
Lyonsia magnifica Dall, 1913
Lyonsia malvinensis d'Orbigny, 1846
Lyonsia norvegica (Gmelin, 1791)
Lyonsia norwegica (Gmelin, 1791)
Lyonsia nuculaniformis Scarlato, 1981
Lyonsia obovata (Koenen)
Lyonsia panamensis Dall, 1908
Lyonsia praetenuis Dunker, 1882
Lyonsia pugetensis Dall, 1913
Lyonsia shimkevitch (M. Sars, 1868)
Lyonsia striata (Montagu, 1815)
Lyonsia taiwanica Lan & Okutani, 2002
Lyonsia ventricosa Gould, 1861
Lyonsia venturaensis
Lyonsia vniroi Scarlato, 1981
