• Acaenomolgus protulae (Stock, 1959)
• Acaenomolgus serpulae (Stock, 1960)
• Acanthochondria clavata (Bassett-Smith, 1896)
• Acanthochondria cornuta (Müller O.F., 1776)
• Acanthochondria limandae (Krøyer, 1863)
• Acanthochondria soleae (Krøyer, 1838)
• Acanthochondria triglae Herrera-Cubilla & Raibaut, 1990
• Acanthochondrites annulatus (Olsson, 1869)
• Achtheres percarum von Nordmann, 1832
• Acontiophorus antennatus Hansen, 1923
• Acontiophorus armatus Brady, 1880
• Acontiophorus bracatus Stock & Kleeton, 1963 accepted as Orecturus bracatus (Stock & Kleeton, 1963)
• Acontiophorus ornatus (Brady & Robertson, 1876)
• Acontiophorus scutatus (Brady & Robertson, 1873)
• Acrenhydrosoma perplexum (Scott T., 1899)
• Aculeopsis longisetosa Huys & Willems, 1989
• Advena paradoxa (Beneden, 1851) accepted as Kabatazus paradoxus (van Beneden, 1851)
• Aegisthus aculeatus Giesbrecht, 1891
• Aegisthus atlanticus Wolfenden, 1902 accepted as Aegisthus mucronatus Giesbrecht, 1891
• Aegisthus mucronatus Giesbrecht, 1891
• Aegisthus spinulosus Farran, 1905
• Afrolaophonte pori Masry, 1970
• Afroleptastacus remanei (Noodt, 1964)
• Agetus flaccus (Giesbrecht, 1891)
• Agetus limbatus (Brady, 1883)
• Agetus typicus Krøyer, 1849
• Agnathaner freemani Hammond, 1968 accepted as Pachypygus freemani (Hammond, 1968)
• Agnathaner minutus Canu, 1892 accepted as Pachypygus gibber (Thorell, 1859)
• Agnathaner typicus Canu, 1892 accepted as Pachypygus typicus (Canu, 1892)
• Aigondiceps bocki (Lang, 1948)
• Aigondiceps brevicauda (Huys, 1995)
• Aigondiceps kunzi (Marinov, 1974)
• Albionella globosa (Leigh-Sharpe, 1918) accepted as Neoalbionella globosa (Leigh-Sharpe, 1918)
• Alebion carchariae Krøyer, 1863
• Alella macrotrachelus (Brian, 1906) accepted as Alella pagelli (Krøyer, 1863)
• Alella pagelli (Krøyer, 1863)
• Allantogynus delamarei Changeux, 1960
• Alteutha aberrans Czerniavski, 1868
• Alteutha austrina Scott T., 1912 accepted as Alteutha depressa (Baird, 1837)
• Alteutha depressa (Baird, 1837)
• Alteutha dubia Scott T., 1912
• Alteutha interrupta (Goodsir, 1845)
• Alteutha oblonga (Goodsir, 1845)
• Alteutha roeae Hicks, 1982
• Alteutha sarsi Monard, 1924
• Alteutha typica Czerniavski, 1868
• Ambunguipes rufocincta (Norman in Brady, 1880)
• Ameira amphibia Brady, 1902 accepted as Nitokra typica Boeck, 1865 represented as Nitokra typica typica Boeck, 1865
• Ameira atlantica Noodt, 1958 represented as Ameira atlantica atlantica Noodt, 1958
• Ameira atlantica atlantica Noodt, 1958
• Ameira atlantica mediterranea Kunz, 1975
• Ameira attenuata Thompson I.C., 1893 accepted as Filexilia attenuata (Thompson I.C., 1893)
• Ameira brevipes Kunz, 1954 accepted as Filexilia brevipes (Kunz, 1954)
• Ameira brevipes pestae Petkovski, 1955 accepted as Ameira pestae Petkovski, 1955 accepted as Filexilia pestae (Petkovski, 1955)
• Ameira divagans Nicholls, 1939 represented as Ameira divagans divagans Nicholls, 1939
• Ameira divagans divagans Nicholls, 1939
• Ameira divagans pontica Marinov, 1973
• Ameira exigua Scott T., 1894
• Ameira faroensis Schriever, 1982
• Ameira gracile Scott A., 1896 accepted as Sicameira gracilis (Scott A., 1896)
• Ameira hyalina (Noodt, 1952) accepted as Psammameira hyalina Noodt, 1952
• Ameira leptoderma (Klie, 1950) accepted as Sicameira leptoderma Klie, 1950
• Ameira listensis Mielke, 1973
• Ameira longipes Boeck, 1865
• Ameira lusitanica Galhano, 1970
• Ameira minuta Boeck, 1865
• Ameira parascotti Chislenko, 1977
• Ameira parvula (Claus, 1866)
• Ameira parvula f. nana Willey, 1935
• Ameira parvula f. tenuiseta Willey, 1929
• Ameira parvula parvula (Claus, 1866) accepted as Ameira parvula (Claus, 1866)
• Ameira parvuloides Lang, 1965
• Ameira pestae Petkovski, 1955 accepted as Filexilia pestae (Petkovski, 1955)
• Ameira pusilla Scott T., 1903
• Ameira reducta Petkovski, 1954
• Ameira scotti Sars G.O., 1911
• Ameira speciosa Monard, 1935
• Ameira tenella Sars G.O., 1907 accepted as Filexilia attenuata (Thompson I.C., 1893)
• Ameira tenuicornis Scott T., 1902
• Ameira usitata Klie, 1950
• Ameiropsis abbreviata Sars G.O., 1911 accepted as Biameiropsis abbreviata (Sars G.O., 1911)
• Ameiropsis angulifera Sars G.O., 1911
• Ameiropsis brevicornis Sars G.O., 1907
• Ameiropsis longicornis Sars G.O., 1907
• Ameiropsis minor (Sars G.O., 1920)
• Ameiropsis mixta Sars G.O., 1907
• Ameiropsis nobilis Sars G.O., 1911
• Ameiropsyllus ariana (Monard, 1928)
• Ameiropsyllus monardi Bodin, 1979
• Ameliotes mediterraneus (Soyer, 1970) accepted as Stratiopontotes mediterraneus Soyer, 1970
• Amenophia peltata Boeck, 1865 accepted as Thalestris peltata (Boeck, 1865)
• Amenophia pulchella Sars G.O., 1906
• Amonardia arctica (Scott T., 1899)
• Amonardia forficula (Claus, 1863) accepted as Parastenhelia forficula (Claus, 1863) accepted as Parastenhelia spinosa (Fischer, 1860) represented as Parastenhelia spinosa spinosa (Fischer, 1860)
• Amonardia littoralis (Sars G.O., 1911) accepted as Parastenhelia littoralis (Sars G.O., 1911) accepted as Microthalestris littoralis Sars G. O., 1911
• Amonardia normani (Brady, 1872) accepted as Dactylopus normani Brady, 1872 accepted as Dactylopusia normani (Brady, 1872) accepted as Robertsonia normani (Brady, 1910)
• Amonardia pelophila Por, 1964
• Amonardia phyllopus (Sars G.O., 1906)
• Amonardia similis (Claus, 1866)
• Amphiascoides breviarticulatus Kunz, 1983