• Abortipedia indica Unnithan, 1962
• Abortipedia pacifica (Meserve, 1938) Unnithan, 1962 accepted as Neomicrocotyle pacifica (Meserve, 1938) Yamaguti, 1968
• Absonifibula bychowskyi Lawler & Overstreet, 1976
• Absonifibula estuarina Santos & Timi, 2009
• Acanthocercodes bullardi Kritsky & Diggles, 2015
• Acanthocercodes megacirrus (Maillard & Vala, 1980) Kritsky & Diggles, 2015
• Acanthocercodes polynemus (Tripathi, 1957) Kritsky & Diggles, 2015
• Acanthocercodes spinosus (Maillard & Vala, 1980) Kritsky & Diggles, 2015
• Acanthocotyle atacamensis Ñacari, Sepúlveda, Escribano & Oliva, 2019
• Acanthocotyle borealis Brinkmann, 1940 accepted as Acanthocotyle verrilli Goto, 1899
• Acanthocotyle bothi MacCallum, 1913 accepted as Bothitrema bothi (MacCallum, 1913) Price, 1936
• Acanthocotyle brachyuropsi Kuznetsova, 1971 (unaccepted > nomen nudum)
• Acanthocotyle branchialis Willem, 1906 accepted as Acanthocotyle monticellii Scott, 1902
• Acanthocotyle canicula Cerfontaine, 1899 accepted as Hexabothrium canicula (Cerfontaine, 1899) Price, 1942
• Acanthocotyle elegans Monticelli, 1890
• Acanthocotyle greeni Macdonald & Llewellyn, 1980
• Acanthocotyle gurgesiella Ñacari, Sepulveda, Escribano & Oliva, 2017
• Acanthocotyle imo Ñacari, Sepúlveda, Escribano & Oliva, 2019
• Acanthocotyle lobianchi Monticelli, 1888
• Acanthocotyle merluccii (Van Beneden & Hesse, 1863) accepted as Anthocotyle merluccii Van Beneden & Hesse, 1863
• Acanthocotyle monticellii Scott, 1902 (uncertain > taxon inquirendum)
• Acanthocotyle musteli MacCallum, 1931 accepted as Onchocotyle musteli (MacCallum, 1931) Dollfus, 1937 accepted as Hexabothrium (incertae sedis) musteli (MacCallum, 1931) Price, 1942
• Acanthocotyle oligoterus Monticelli, 1899 accepted as Acanthocotyle lobianchi Monticelli, 1888
• Acanthocotyle pacifica Bonham & Guberlet, 1938
• Acanthocotyle patagonica Kuznetsova, 1975
• Acanthocotyle pugetensis Bonham & Guberlet, 1938
• Acanthocotyle raiae MacCallum, 1916 accepted as Empruthotrema raiae (MacCallum, 1916) Johnston & Tiegs, 1922
• Acanthocotyle scobini Kuznetsova, 1971 (unaccepted > nomen nudum)
• Acanthocotyle squatinae MacCallum, 1921 accepted as Trochopus squatinae (MacCallum, 1921) Price, 1937 accepted as Sprostonia squatinae (MacCallum, 1921) Bychowski, 1957
• Acanthocotyle urolophi Kearn, Whittington, Chisholm & Evans-Gowing, 2016
• Acanthocotyle verrilli Goto, 1899
• Acanthocotyle williamsi Price, 1938
• Acanthodiscus mirabile MacCallum, 1918 accepted as Acanthodiscus mirabilis MacCallum, 1918 accepted as Protomicrocotyle mirabilis (MacCallum, 1918) Johnston & Tiegs, 1922
• Acanthodiscus mirabilis MacCallum, 1918 accepted as Protomicrocotyle mirabilis (MacCallum, 1918) Johnston & Tiegs, 1922
• Acanthodiscus remorae MacCallum, 1916 accepted as Dionchotrema remorae (MacCallum, 1916) Johnston & Tiegs, 1922 accepted as Dionchus remorae (MacCallum, 1916) Price, 1938
• Acanthoplacatus adlardi Ernst, Jones & Whittington, 2001
• Acanthoplacatus amplihamus Ernst, Jones & Whittington, 2001
• Acanthoplacatus brauni Ernst, Jones & Whittington, 2001
• Acanthoplacatus parvihamus Ernst, Jones & Whittington, 2001
• Acanthoplacatus puelli Ernst, Jones & Whittington, 2001
• Acanthoplacatus shieldsi Ernst, Jones & Whittington, 2001
• Acanthoplacatus sigani Ernst, Jones & Whittington, 2001
• Accessorius peruensis Jara, An & Cone, 1991
• Acleotrema alejandroi Santillan, Cruces, Mondragón-Martínez, Martínez-Rojas & Chero, 2025
• Acleotrema diplobulbus (Yamaguti, 1968) Domingues & Boeger, 2007
• Acleotrema flabelliforme (Lim, 2006)
• Acleotrema gibsoni Young, 1970 accepted as Acleotrema girellae Johnston & Tiegs, 1922
• Acleotrema girellae Johnston & Tiegs, 1922
• Acleotrema heronensis Young, 1970 accepted as Acleotrema girellae Johnston & Tiegs, 1922
• Acleotrema kyphosi Yamaguti, 1968 accepted as Acleotrema girellae Johnston & Tiegs, 1922
• Acleotrema lamothei Santos, Bianchi & Gibson, 2008
• Acleotrema maculatum Morsey, Fayoumi & Fahmy, 2014 (unaccepted > unavailable name)
• Acleotrema maculatus Morsy, El Fayoumi & Fahmy, 2014 accepted as Acleotrema maculatum Morsey, Fayoumi & Fahmy, 2014
• Acleotrema nenue (Yamaguti, 1968) Dominques & Boeger, 2007
• Acleotrema nenuoides (Rakotofiringa, Oliver & Lambert, 1987) accepted as Acleotrema nenue (Yamaguti, 1968) Dominques & Boeger, 2007
• Acleotrema oliveri (León-Régagnon, Pérez-Ponce de León & Garcia Prieto, 1997) Domingues & Boeger, 2007
• Acleotrema parastromatei (Rakotofiringa, Oliver & Lambert, 1987) Domingues & Boeger, 2007
• Acleotrema serrulopenis (Rakotofiringa, Oliver & Lambert, 1987)
• Acleotrema spiculare (Yamaguti, 1968) Domingues & Boeger, 2007
• Acleotrema tamatavense (Rakotofiringa, Oliver & Lambert, 1987)
• Acleotrema yamagutii (Oliver, 1983)
• Acolpenteron australe Viozzi & Brugni, 2003
• Acolpenteron catostomi Fischthal & Allison, 1942
• Acolpenteron ignotus Gusev, 1955 accepted as Pseudacolpenteron ignotus (Gusev, 1955) Bychowsky & Gusev, 1955 accepted as Pseudacolpenteron ignotum (Gusev, 1955) Bychowsky & Gusev, 1955
• Acolpenteron nephriticum Gvozdev, 1945
• Acolpenteron petruschewskyi Strelkov, 1962
• Acolpenteron ureteroecetes Fischthal & Allison, 1940
• Acolpenteron willifordense Fayton & Kritsky, 2013
• Acolpenteron willifordensis Fayton & Kritsky, 2013 accepted as Acolpenteron willifordense Fayton & Kritsky, 2013
• Actinocleidus articularis (Mizelle, 1936) Mueller, 1937
• Actinocleidus bakeri Mizelle & Cronin, 1943 (uncertain > taxon inquirendum)
• Actinocleidus bennetti Allison & Rogers, 1970
• Actinocleidus bifidus Mizelle & Cronin, 1943
• Actinocleidus bifurcatus Mizelle, 1941 accepted as Clavunculus bifurcatus (Mizelle, 1941) Mizelle, Stokely, Jaskoski, Seamster & Monaco, 1956
• Actinocleidus brevicirrus Mizelle & Jaskoski, 1942
• Actinocleidus bursatus (Mueller, 1936) Mueller, 1937 accepted as Clavunculus bursatus (Mueller, 1936) Mizelle, Stokely, Jaskoski, Seamster & Monaco, 1956
• Actinocleidus crinicirrus Kritsky & Leiby, 1973 accepted as Crinicleidus crinicirrus (Kritsky & Leiby, 1973) Beverley-Burton, 1986
• Actinocleidus cruciatus (Wedl, 1858)
• Actinocleidus fergusoni Mizelle, 1938
• Actinocleidus flagellatus Mizelle & Seamster, 1939 (uncertain > taxon inquirendum)
• Actinocleidus fusiformis (Mueller, 1934) Mueller, 1937 accepted as Syncleithrium fusiforme (Mueller, 1934) Price, 1967
• Actinocleidus georgiensis Price, 1966
• Actinocleidus gibbosus Mizelle & Donahue, 1944 (uncertain > taxon inquirendum)
• Actinocleidus gracilis Mueller, 1937 (uncertain > taxon inquirendum)
• Actinocleidus harquebus Mizelle & Cronin, 1943 (uncertain > taxon inquirendum)
• Actinocleidus incus Mizelle & Donahue, 1944 (uncertain > taxon inquirendum)
• Actinocleidus leiognathi Tripathi, 1959
• Actinocleidus longus Mizelle, 1938 accepted as Crinicleidus longus (Mizelle, 1938) Beverley-Burton, 1986
• Actinocleidus maculatus Mueller, 1937 (uncertain > taxon inquirendum)
• Actinocleidus mizellei Hanek & Fernando, 1972 accepted as Clavunculus bursatus (Mueller, 1936) Mizelle, Stokely, Jaskoski, Seamster & Monaco, 1956
• Actinocleidus muelleri Ferdousi & Chandra, 2002 accepted as Scutogyrus longicornis (Paperna & Thurston, 1969) Pariselle & Euzet, 1995
• Actinocleidus oculatus (Mueller, 1934) Mueller, 1937
• Actinocleidus okeechobeensis Mizelle & Seamster, 1939 (uncertain > taxon inquirendum)
• Actinocleidus recurvatus Mizelle & Donahue, 1944
• Actinocleidus scapularis Mizelle & Donahue, 1944 accepted as Actinocleidus incus Mizelle & Donahue, 1944
• Actinocleidus sigmoideus Mizelle & Donahue, 1944 accepted as Actinocleidus incus Mizelle & Donahue, 1944
• Actinocleidus subtriangularis Mizelle & Jaskoski, 1942 (uncertain > taxon inquirendum)
• Actinocleidus triangularis Summers, 1937 accepted as Anchoradiscus triangularis (Summers, 1937) Mizelle, 1941
• Actinocleidus unguis Mizelle & Cronin, 1943
• Adenicola arabicus Mamaev & Parukhin, 1972