Spionidae Grube, 1850
Spio aequalis Ehlers, 1905
Spio armata (Thulin, 1957)
Spio arndti Meissner, Bick & Bastrop, 2011
Spio bengalensis Willey, 1908
Spio blakei Maciolek, 1990
Spio borealis Okuda, 1937
Spio butleri Berkeley & Berkeley, 1954
Spio calcarea Templeton, 1836
Spio californica Fewkes, 1889
Spio celata Dalyell, 1853
Spio cirrifera (Banse & Hobson, 1968)
Spio crenaticornis Montagu, 1813
Spio decoratus Bobretzky, 1870
Spio filicornis (Müller, 1776)
Spio gaucha Orensanz & Gianuca, 1974
Spio goniocephala Thulin, 1957
Spio gorbunovi Averincev, 1990
Spio limicola Verrill, 1879
Spio maciolekae Blake in Blake, Hilbig & Scott, 1996
Spio maculata (Hartman, 1961)
Spio malmgreni Sikorski in Jirkov, 2001
Spio martinensis Mesnil, 1896
Spio mesnili Augener, 1914
Spio minus
Spio multioculata (Rioja, 1918)
Spio obtusa Ehlers, 1913
Spio pacifica Blake & Kudenov, 1978
Spio parva (Dalyell, 1853)
Spio pettiboneae Foster, 1971
Spio punctata Hartman, 1961
Spio quadricornis Savigny in Lamarck, 1818
Spio quadrisetosa Blake, 1983
Spio readi Blake, 1984
Spio seticornis (Linnaeus, 1767)
Spio setosa Verrill, 1873
Spio singularis Blake & Kudenov, 1978
Spio symphyta Meissner, Bick & Bastrop, 2011
Spio theeli (Soderstrom, 1920)
Spio thulini Maciolek, 1990
Spio tridentata Hutchings & Turvey, 1984
Spio tzetlini Sikorski in Jirkov, 2001
Spio unidentata Chlebovitsch, 1959
