1. Species Gasterostomum arcuatum Linton, 1900 accepted as Prosorhynchoides arcuatus (Linton, 1900) Love & Moser, 1983 (unaccepted > superseded combination)
2. Species Gasterostomum baculum Linton, 1905 accepted as Nannoenterum baculum (Linton, 1905) Manter, 1931 accepted as Rhipidocotyle baculum (Linton, 1905) Eckmann, 1932 (Superseded combination)
3. Species Gasterostomum blanchardi Stossich, 1898 accepted as Bucephalus blanchardi (Stossich, 1898) Yamaguti, 1958
4. Species Gasterostomum capitatum Linton, 1940 accepted as Rhipidocotyle capitata (Linton, 1940) Manter, 1947
5. Species Gasterostomum clupeae Van Beneden, 1870 accepted as Bucephalus clupeae (Van Beneden, 1870) Yamaguti, 1958 (Superseded combination)
6. Species Gasterostomum crucibulum (Rudolphi, 1819) accepted as Prosorhynchus crucibulum (Rudolphi, 1819) Odhner, 1905 (superseded combination)
7. Species Gasterostomum crucibulum of van Beneden, 1870 accepted as Skrjabiniella aculeatus (Odhner, 1905) Issaitschikow, 1928 accepted as Skrjabiniella aculeata (Odhner, 1905) Issaitschikow, 1928 (unaccepted > junior subjective synonym)
8. Species Gasterostomum gadorum (Rathke, 1799) accepted as Bucephalus gadorum (Rathke, 1799) Yamaguti, 1958 (Superseded combination)
9. Species Gasterostomum galeatum (Rudolphi, 1819) Stossich, 1898 accepted as Rhipidocotyle galeata (Rudolphi, 1819) Eckmann, 1932 (superseded combination)
10. Species Gasterostomum gorgon Linton, 1905 accepted as Bucephalus gorgon (Linton, 1905) Eckmann, 1932 (Superseded combination)
11. Species Gasterostomum gracilescens (Rudolphi, 1819) Wagener, 1852 accepted as Prosorhynchoides gracilescens (Rudolphi, 1819) Stunkard, 1976 (superseded combination)
12. Species Gasterostomum minimum Stossich, 1887 accepted as Bucephalus minimus (Stossich, 1887) Nicoll, 1914 (synonym)
13. Species Gasterostomum minimum Wagener, 1852 accepted as Rhipidocotyle minima (Wagener, 1852) Diesing, 1858 (synonym)
14. Species Gasterostomum ovatum Linton, 1900 accepted as Prosorhynchoides ovatus (Linton, 1900) Dollfus, 1929 (synonym)
15. Species Gasterostomum tergestinum Stossich, 1883 accepted as Prosorhynchoides tergestinus (Stossich, 1883) Bartoli, Bray & Gibson, 2005 (synonym)
16. Species Gasterostomum triglae van Benededen, 1870 accepted as Prosorhynchoides triglae (Van Beneden, 1870) Eckmann, 1932 accepted as Rhipidocotyle triglae (Van Beneden, 1870) Kniskern, 1952 (superseded combination)
17. Species Gasterostomum viperae van Beneden, 1870 accepted as Rhipidocotyle viperae (Van Beneden, 1870) Nicoll, 1914 (Superseded combination)
18. Species Gasterostomum vivae van Beneden, 1870 accepted as Bucephalus vivae (van Beneden, 1870) Yamaguti, 1958 (nomen nudum)

 The webpage text is licensed under a Creative Commons Attribution 4.0 License