1. Species Phymosoma agassizii (Keferstein, 1866) accepted as Phascolosoma (Phascolosoma) agassizii agassizii Keferstein, 1866 (subsequent combination)
2. Species Phymosoma albolineatum (Baird, 1868) accepted as Phascolosoma (Phascolosoma) albolineatum (Baird, 1868) (subsequent combination)
3. Species Phymosoma antillarum (Grube, 1858) accepted as Antillesoma antillarum (Grube, 1858) (subsequent combination)
4. Species Phymosoma asperum (Grube, 1868) accepted as Phascolosoma (Phascolosoma) pacificum Keferstein, 1866 (subsequent combination)
5. Species Phymosoma asser Selenka & De Man in Selenka, de Man & Bülow, 1883 accepted as Antillesoma antillarum (Grube, 1858) (synonym)
6. Species Phymosoma deani Ikeda, 1905 accepted as Phascolosoma (Phascolosoma) arcuatum (Gray, 1828) (synonym)
7. Species Phymosoma dentigerum Selenka & De Man in Selenka, de Man & Bülow, 1883 accepted as Phascolosoma (Phascolosoma) perlucens Baird, 1868 (synonym)
8. Species Phymosoma diaphanes Sluiter, 1886 accepted as Phascolosoma (Phascolosoma) nigrescens (Keferstein, 1865) (synonym)
9. Species Phymosoma duplicigranulatum Sluiter, 1886 accepted as Phascolosoma (Phascolosoma) nigrescens (Keferstein, 1865) (synonym)
10. Species Phymosoma granulatum (Leuckart, 1828) accepted as Phascolosoma (Phascolosoma) granulatum Leuckart, 1828 (subsequent combination)
11. Species Phymosoma herouardi Hérubel, 1903 accepted as Phascolosoma (Phascolosoma) granulatum Leuckart, 1828 (synonym)
12. Species Phymosoma japonicum (Grube, 1877) accepted as Phascolosoma (Phascolosoma) noduliferum Stimpson, 1855 (synonym)
13. Species Phymosoma lacteum Sluiter, 1886 accepted as Phascolosoma (Phascolosoma) nigrescens (Keferstein, 1865) (synonym)
14. Species Phymosoma loveni (Koren & Danielssen, 1876) accepted as Phascolosoma (Phascolosoma) granulatum Leuckart, 1828 (spelling variation)
15. Species Phymosoma lovenii (Koren & Danielssen, 1876) accepted as Phascolosoma (Phascolosoma) granulatum Leuckart, 1828 (subsequent combination)
16. Species Phymosoma lurco Selenka & De Man in Selenka, de Man & Bülow, 1883 accepted as Phascolosoma (Phascolosoma) arcuatum (Gray, 1828) (synonym)
17. Species Phymosoma maculatum Sluiter, 1886 accepted as Phascolosoma (Phascolosoma) maculatum (Sluiter, 1886) (basionym)
18. Species Phymosoma meteori Hérubel, 1904 accepted as Phascolosoma (Phascolosoma) meteori (Hérubel, 1904) (basionym)
19. Species Phymosoma microdontoton Shipley, 1898 accepted as Phascolosoma (Phascolosoma) glabrum glabrum (Sluiter, 1902) (synonym)
20. Species Phymosoma microdontoton Sluiter, 1886 accepted as Phascolosoma (Phascolosoma) albolineatum (Baird, 1868) (synonym)
21. Species Phymosoma nigrescens (Keferstein, 1865) accepted as Phascolosoma (Phascolosoma) nigrescens (Keferstein, 1865) (subsequent combination)
22. Species Phymosoma noduliferum (Stimpson, 1855) accepted as Phascolosoma (Phascolosoma) noduliferum Stimpson, 1855 (subsequent combination)
23. Species Phymosoma onomichianum Ikeda, 1904 accepted as Antillesoma antillarum (Grube, 1858) (synonym)
24. Species Phymosoma pacificum (Keferstein, 1866) accepted as Phascolosoma (Phascolosoma) pacificum Keferstein, 1866 (subsequent combination)
25. Species Phymosoma pectinatum (Keferstein, 1867) accepted as Apionsoma (Edmondsius) pectinatum (Keferstein, 1867) (subsequent combination)
26. Species Phymosoma pelma Selenka & De Man in Selenka, de Man & Bülow, 1883 accepted as Antillesoma antillarum (Grube, 1858) (synonym)
27. Species Phymosoma psaron Sluiter, 1886 accepted as Phascolosoma (Phascolosoma) scolops (Selenka & de Man, 1883) (synonym)
28. Species Phymosoma scolops (Selenka & De Man, 1883) accepted as Phascolosoma (Phascolosoma) scolops (Selenka & de Man, 1883) (basionym)
29. Species Phymosoma spengeli Sluiter, 1886 accepted as Phascolosoma (Phascolosoma) nigrescens (Keferstein, 1865) (synonym)
30. Species Phymosoma varians (Keferstein, 1865) accepted as Phascolosoma (Phascolosoma) nigrescens (Keferstein, 1865) (synonym)

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