Allolepidapedon Yamaguti, 1940 (original description)
Allolepidapedon fistulariae Yamaguti, 1940 (original description)
Bucephalopsis sibi Yamaguti, 1940 accepted as Prosorhynchoides sibi (Yamaguti, 1940) Love & Moser, 1983 (original description)
Coitocaecum leptoscari Yamaguti, 1940 (original description)
Coitocaecum xesuri Yamaguti, 1940 (original description)
Decemtestis callionymi Yamaguti, 1934 (redescription)
Deretrema fellis (Yamaguti, 1934) Yamaguti, 1940 (new combination reference)
Deretrema hoplognathi Yamaguti, 1940 accepted as Deretrema plotosi Yamaguti, 1940 (original description)
Deretrema plotosi Yamaguti, 1940 (original description)
Deretrema sebastodis (Yamaguti, 1934) Yamaguti, 1940 (new combination reference)
Echinostephanus fistulariae Yamaguti, 1940 accepted as Stephanostomum fistulariae (Yamaguti, 1940) Manter & Van Cleave, 1951 (original description)
Ectenurus hamati Yamaguti, 1934 accepted as Erilepturus hamati (Yamaguti, 1934) Manter, 1947 (redescription)
Gonapodasmius cypseluri Yamaguti, 1940 accepted as Didymodiclinus cypseluri (Yamaguti, 1940) Pozdnyakov, 1994 (original description)
Hamacreadium epinepheli Yamaguti, 1934 accepted as Cainocreadium epinepheli (Yamaguti, 1934) Durio & Manter, 1968 (redescription)
Helicometra epinepheli Yamaguti, 1934 (redescription)
Hoplognathus fasciatus (Temminck & Schlegel, 1844) accepted as Oplegnathus fasciatus (Temminck & Schlegel, 1844) (additional source)
Hoplognathus punctatus accepted as Oplegnathus punctatus (Temminck & Schlegel, 1844) (basis of record)
Hysterolecitha xesuri Yamaguti, 1938 accepted as Thulinia microrchis (Yamaguti, 1934) Bray, Cribb & Barker, 1993 (redescription)
Lampritrema Yamaguti, 1940 (original description)
Lampritrema nipponicum Yamaguti, 1940 accepted as Lampritrema miescheri (Zschokke, 1890) Margolis, 1962 (original description)
Lampritrematinae Yamaguti, 1940 accepted as Hirudinellidae Dollfus, 1932 (original description)
Lecithaster salmonis Yamaguti, 1934 (redescription)
Lecithaster stellatus Looss, 1907 (redescription)
Lepidapedon sebastisci Yamaguti, 1938 accepted as Paralepidapedon sebastisci (Yamaguti, 1938) Shimazu & Shimura, 1984 (redescription)
Maculifer pacificus Yamaguti, 1938 (redescription)
Musculovesicula Yamaguti, 1940 (original description)
Musculovesicula gymnothoracis Yamaguti, 1940 (original description)
Nematobothrium lampridis Yamaguti, 1940 accepted as Metadidymocystis lampridis (Yamaguti, 1940) Pozdnyakov, 1996 (original description)
Opechona girellae Yamaguti, 1940 accepted as Prodistomum girellae (Yamaguti, 1940) Bray & Gibson, 1990 (original description)
Opechona xesuri Yamaguti, 1940 accepted as Preptetos xesuri (Yamaguti, 1940) Pritchard, 1960 (original description)
Opechonoides Yamaguti, 1940 (original description)
Opechonoides gure Yamaguti, 1940 (original description)
Opecoelus lobatus Ozaki, 1925 (redescription)
Opecoelus minor Yamaguti, 1934 (redescription)
Opecoelus mutu Yamaguti, 1940 (original description)
Opecoelus sphaericus Ozaki, 1925 (redescription)
Opegaster brevifistula Ozaki, 1928 (redescription)
Opegaster plotosi Yamaguti, 1940 (original description)
Paralepidapedon hoplognathi (Yamaguti, 1938) Shimazu & Shimura, 1984 (redescription)
Pedunculacetabulum opisthorchis Yamaguti, 1934 (redescription)
Plagioporus calotomi (Yamaguti, 1934) Yamaguti, 1938 accepted as Choerodonicola calotomi (Yamaguti, 1934) Cribb, 2005 (redescription)
Plagioporus choerodonis (Yamaguti, 1934) Yamaguti, 1938 accepted as Choerodonicola choerodontis (Yamaguti, 1934) Cribb, 2005 (redescription)
Plagioporus ira Yamaguti, 1940 accepted as Neolebouria ira (Yamaguti, 1940) Gibson, 1976 accepted as Trilobovarium ira (Yamaguti, 1940) Martin, Cutmore & Cribb, 2017 (original description)
Plagioporus japonicus Yamaguti, 1938 accepted as Macvicaria japonica (Yamaguti, 1938) Bray & Cribb, 1989 (redescription)
Pseudopecoeloides Yamaguti, 1940 (original description)
Pseudopecoeloides carangis (Yamaguti, 1938) Yamaguti, 1940 (new combination reference)
Pseudopecoeloides tenuis Yamaguti, 1940 (original description)
Pseudosteringophorus Yamaguti, 1940 (original description)
Pseudosteringophorus hoplognathi Yamaguti, 1940 (original description)
Sterrhurus gymnothoracis Yamaguti, 1940 accepted as Lecithochirium gymnothoracis (Yamaguti, 1940) Skrjabin & Guschanskaja, 1955 (original description)
Tergestia laticollis (Rudolphi, 1819) Stossich, 1899 (additional source)
Trifoliovarium Yamaguti, 1940 (original description)
Trifoliovarium acanthocepolae Yamaguti, 1940 (original description)
Tubulovesicula anguillae Yamaguti, 1934 accepted as Tubulovesicula angusticauda (Nicoll, 1915) Yamaguti, 1934 (redescription)
Tubulovesicula muraenesocis Yamaguti, 1934 accepted as Tubulovesicula angusticauda (Nicoll, 1915) Yamaguti, 1934 (redescription)

Central Kuroshio Current for Opechonoides gure Yamaguti, 1940 
Central Kuroshio Current for Paralepidapedon hoplognathi (Yamaguti, 1938) Shimazu & Shimura, 1984 
Central Kuroshio Current for Proctoeces maculatus (Looss, 1901) Odhner, 1911 
Japanese Exclusive Economic Zone for Bucephalopsis sibi Yamaguti, 1940 
Japanese Exclusive Economic Zone for Decemtestis callionymi Yamaguti, 1934 
Japanese Exclusive Economic Zone for Deretrema hoplognathi Yamaguti, 1940 
Japanese Exclusive Economic Zone for Deretrema plotosi Yamaguti, 1940 
Japanese Exclusive Economic Zone for Echinostephanus fistulariae Yamaguti, 1940 
Japanese Exclusive Economic Zone for Ectenurus hamati Yamaguti, 1934 
Japanese Exclusive Economic Zone for Gonapodasmius cypseluri Yamaguti, 1940 
Japanese Exclusive Economic Zone for Hamacreadium epinepheli Yamaguti, 1934 
Japanese Exclusive Economic Zone for Helicometra epinepheli Yamaguti, 1934 
Japanese Exclusive Economic Zone for Hysterolecitha xesuri Yamaguti, 1938 
Japanese Exclusive Economic Zone for Lampritrema nipponicum Yamaguti, 1940 
Japanese Exclusive Economic Zone for Lecithaster salmonis Yamaguti, 1934 
Japanese Exclusive Economic Zone for Lecithaster stellatus Looss, 1907 
Japanese Exclusive Economic Zone for Lepidapedon sebastisci Yamaguti, 1938 
Japanese Exclusive Economic Zone for Maculifer pacificus Yamaguti, 1938 
Japanese Exclusive Economic Zone for Musculovesicula gymnothoracis Yamaguti, 1940 
Japanese Exclusive Economic Zone for Opechona girellae Yamaguti, 1940 
Japanese Exclusive Economic Zone for Opechona xesuri Yamaguti, 1940 
Japanese Exclusive Economic Zone for Opecoelus minor Yamaguti, 1934 
Japanese Exclusive Economic Zone for Opecoelus sphaericus Ozaki, 1925 
Japanese Exclusive Economic Zone for Opegaster brevifistula Ozaki, 1928 
Japanese Exclusive Economic Zone for Pedunculacetabulum opisthorchis Yamaguti, 1934 
Japanese Exclusive Economic Zone for Plagioporus calotomi (Yamaguti, 1934) Yamaguti, 1938 
Japanese Exclusive Economic Zone for Plagioporus choerodonis (Yamaguti, 1934) Yamaguti, 1938 
Japanese Exclusive Economic Zone for Plagioporus japonicus Yamaguti, 1938 
Japanese Exclusive Economic Zone for Pseudosteringophorus hoplognathi Yamaguti, 1940 
Japanese Exclusive Economic Zone for Sterrhurus gymnothoracis Yamaguti, 1940 
Japanese Exclusive Economic Zone for Tergestia laticollis (Rudolphi, 1819) Stossich, 1899 
Japanese Exclusive Economic Zone for Trifoliovarium acanthocepolae Yamaguti, 1940 
Japanese Exclusive Economic Zone for Tubulovesicula anguillae Yamaguti, 1934 
Japanese Exclusive Economic Zone for Tubulovesicula muraenesocis Yamaguti, 1934 
Japanese part of the North Pacific Ocean for Allolepidapedon fistulariae Yamaguti, 1940 
Japanese part of the North Pacific Ocean for Coitocaecum leptoscari Yamaguti, 1940 
Japanese part of the North Pacific Ocean for Coitocaecum xesuri Yamaguti, 1940 
Japanese part of the North Pacific Ocean for Nematobothrium lampridis Yamaguti, 1940 
Japanese part of the North Pacific Ocean for Opecoelus mutu Yamaguti, 1940 
Japanese part of the North Pacific Ocean for Opegaster plotosi Yamaguti, 1940 
Japanese part of the North Pacific Ocean for Plagioporus ira Yamaguti, 1940 
Japanese part of the North Pacific Ocean for Pseudopecoeloides carangis (Yamaguti, 1938) Yamaguti, 1940 
Japanese part of the North Pacific Ocean for Pseudopecoeloides tenuis Yamaguti, 1940 

 Biology

 for Pseudopecoeloides tenuis Yamaguti, 1940

Host as Pseudopriacanthus nipponicus (Cuv. et Valen.) [details]