1. Species Mesogloia coccinea C.Agardh, 1824
2. Species Mesogloia ikomae (Narita) H.Kawai & T.Hanyuda, 2019
3. Species Mesogloia lanosa P.L.Crouan & H.M.Crouan, 1867
4. Species Mesogloia mediterranea J.Agardh, 1842
5. Species Mesogloia vermiculata (Smith) S.F.Gray, 1821
6. Species Mesogloia andersonii Farlow, 1889 accepted as Haplogloia andersonii (Farlow) Levring, 1939
7. Species Mesogloia attenuata C.Agardh, 1824 accepted as Crouania attenuata (C.Agardh) J.Agardh, 1842
8. Species Mesogloia bertolonii Moris & De Notaris, 1839 accepted as Nemalion elminthoides (Velley) Batters, 1902 (synonym)
9. Species Mesogloia brasiliensis Montagne, 1843 accepted as Levringia brasiliensis (Montagne) A.B.Joly, 1953
10. Species Mesogloia crassa Suringar, 1873 accepted as Tinocladia crassa (Suringar) Kylin, 1940 accepted as Eudesme crassa (Suringar) Okamura, 1935 accepted as Tinocladia crassa (Suringar) Kylin, 1940
11. Species Mesogloia decipiens Suringar, 1872 accepted as Nemacystus decipiens (Suringar) Kuckuck, 1929
12. Species Mesogloia divaricata C.Agardh, 1824 accepted as Helminthora divaricata (C.Agardh) J.Agardh, 1852
13. Species Mesogloia ekmani Areschoug, 1864 accepted as Myriocladia ekmanii (Areschoug) Kylin, 1907
14. Species Mesogloia falklandica Skottsberg, 1921 accepted as Eudesme falklandica (Skottsberg) H.Kawai, 2023
15. Species Mesogloia filum Harvey, 1855 accepted as Cladosiphon filum (Harvey) Kylin, 1940
16. Species Mesogloia fistulosa Zanardini, 1843 accepted as Cladosiphon mediterraneus Kützing, 1843 (synonym)
17. Species Mesogloia flavescens Zanardini, 1858 accepted as Eudesme flavescens (Zanardini) De Toni, 1895
18. Species Mesogloia griffithsiana Greville, 1833 accepted as Sauvageaugloia divaricata (Clemente) Cremades, 1990
19. Species Mesogloia hornemanni Suhr ex Hornemann, 1836 accepted as Helminthora divaricata (C.Agardh) J.Agardh, 1852
20. Species Mesogloia hudsonii C.Agardh, 1824 accepted as Nemalion elminthoides (Velley) Batters, 1902 (synonym)
21. Species Mesogloia intestinalis Harvey, 1855 accepted as Myriogloea intestinalis (Harvey) Lindauer, V.J.Chapman & Aiken, 1961
22. Species Mesogloia leveillei (J.Agardh) Meneghini, 1843 accepted as Liebmannia leveillei J.Agardh, 1842 accepted as Mesogloia vermiculata (Smith) S.F.Gray, 1821
23. Species Mesogloia linearis J.D.Hooker & Harvey, 1845 accepted as Chordaria linearis (J.D.Hooker & Harvey) A.D.Cotton, 1915
24. Species Mesogloia microcarpa Montagne, 1844 accepted as Halymenia microcarpa (Montagne) P.C.Silva, 1987
25. Species Mesogloia moniliformis Griffiths, 1841 accepted as Crouania attenuata (C.Agardh) J.Agardh, 1842 (synonym)
26. Species Mesogloia multifida (Lyngbye) C.Agardh, 1824 accepted as Nemalion multifidum (Lyngbye) Chauvin, 1842 (synonym)
27. Species Mesogloia natalensis Kützing, 1847 accepted as Levringia natalensis (Kützing) Kylin, 1940
28. Species Mesogloia neglecta Batters, 1906 accepted as Acrothrix neglecta (Batters) Kuckuck, 1929 (synonym)
29. Species Mesogloia nemalion (Bertoloni) Solier, 1845 accepted as Nemalion elminthoides (Velley) Batters, 1902
30. Species Mesogloia purpurea Harvey, 1833 accepted as Helminthocladia calvadosii (J.V.Lamouroux ex Duby) Setchell, 1915
31. Species Mesogloia ramosissima Zanardini, 1858 accepted as Myriogloea ramosissima (Zanardini) Papenfuss, 1968 (synonym)
32. Species Mesogloia rubra (Hudson) Areschoug, 1840 accepted as Nemalion elminthoides (Velley) Batters, 1902
33. Species Mesogloia simplex De A.Saunders, 1901 accepted as Saundersella simplex (De A.Saunders) Kylin, 1940
34. Species Mesogloia vermicularis C.Agardh, 1817 accepted as Mesogloia vermiculata (Smith) S.F.Gray, 1821 (synonym)
35. Species Mesogloia virescens Carmichael ex Berkeley, 1833 accepted as Eudesme virescens (Carmichael ex Berkeley) J.Agardh, 1882
36. Species Mesogloia zosterae (Lyngbye) Areschoug, 1842 accepted as Eudesme virescens (Carmichael ex Berkeley) J.Agardh, 1882
37. Species Mesogloia tingitana Schousboe (uncertain)

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