1. Species Agarum asiaticum De la Pylaie, 1830
2. Species Agarum brassiciforme (Postels & Ruprecht) Setchell & Gardner
3. Species Agarum clathratum Dumortier, 1822
4. Species Agarum crenulatum (J.Agardh) Trevisan
5. Species Agarum pertusum (K.H.Mertens) Postels & Ruprecht, 1840
6. Species Agarum turneri Postels & Ruprecht, 1840
7. Species Agarum brodiei (Turner) Trevisan, 1845 accepted as Coccotylus truncatus (Pallas) M.J.Wynne & J.N.Heine, 1992 (synonym)
8. Species Agarum clathrus (S.G.Gmelin) Greville, 1830 accepted as Thalassiophyllum clathrus (S.G.Gmelin) Postels & Ruprecht, 1840
9. Species Agarum corallina Nees, 1820 accepted as Griffithsia corallinoides (Linnaeus) Trevisan, 1845 (synonym)
10. Species Agarum costatum (C.Agardh) Dumortier, 1822 accepted as Costaria costata (C.Agardh) De A.Saunders, 1895 (synonym)
11. Species Agarum costatum (Turner) Gaillon, 1828 accepted as Costaria costata (C.Agardh) De A.Saunders, 1895 (synonym)
12. Species Agarum cribrosum Bory, 1826 accepted as Agarum clathratum Dumortier, 1822
13. Species Agarum cribrum Gaillon, 1828 accepted as Agarum clathratum Dumortier, 1822 (synonym)
14. Species Agarum delisei Bory de Saint-Vincent, 1826 accepted as Alaria esculenta (Linnaeus) Greville, 1830 (synonym)
15. Species Agarum esculentum (Linnaeus) Bory de Saint-Vincent, 1826 accepted as Alaria esculenta (Linnaeus) Greville, 1830
16. Species Agarum fimbriatum Harvey, 1862 accepted as Neoagarum fimbriatum (Harvey) H.Kawai & T.Hanyuda, 2017
17. Species Agarum gmelinii Mertens ex Postels & Ruprecht, 1840 accepted as Agarum clathratum Dumortier, 1822
18. Species Agarum herediae (Clemente) Trevisan, 1845 accepted as Phyllophora herediae (Clemente) J.Agardh, 1842 (synonym)
19. Species Agarum membranifolium (Goodenough & Woodward) Trevisan, 1845 accepted as Phyllophora pseudoceranoïdes (S.G.Gmelin) Newroth & A.R.A.Taylor ex P.S.Dixon & L.M.Irvine, 1977 (synonym)
20. Species Agarum oharaense Yamada, 1961 accepted as Neoagarum oharaense (Yamada) H.Kawai, 2017
21. Species Agarum pylaiei Bory, 1826 accepted as Alaria pylaiei (Bory) Greville, 1830
22. Species Agarum quinquecostatum Bory, 1826 accepted as Costaria costata (C.Agardh) De A.Saunders, 1895
23. Species Agarum reptans (Roth) Nees, 1820 accepted as Lomentaria articulata (Hudson) Lyngbye, 1819 (synonym)
24. Species Agarum rubens (Linnaeus) Link, 1809 accepted as Phycodrys rubens (Linnaeus) Batters, 1902
25. Species Agarum yakishiriense Yamada, 1962 accepted as Agarum clathratum subsp. yakishiriense Yamada ex G.H.Boo & P.C.Silva, 2011 (synonym)
26. Species Agarum nervosum (De Candolle) Trevisan (uncertain)
27. Species Agarum proliferum (Lightf.) Trevisan (uncertain)
28. Species Agarum proliferum (Roth) Nees (uncertain)

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