1. Species Meckelia asulcata McIntosh, 1874
2. Species Meckelia cerebratulus Diesing, 1850
3. Species Meckelia olivacea sensu Rathke, 1843
4. Species Meckelia albo-vittata Simpson, 1855 accepted as Notospermus albovittatus (Stimpson, 1855) (synonym)
5. Species Meckelia annulata Grube, 1840 accepted as Notospermus annulatus (Grube, 1840) (unaccepted > superseded combination)
6. Species Meckelia atrocaerulea Schmarda, 1859 accepted as Lineus atrocaeruleus (Schmarda, 1859) (synonym)
7. Species Meckelia aurantiaca Grube, 1855 accepted as Leucocephalonemertes aurantiaca (Grube, 1855) (synonym)
8. Species Meckelia bilineata (Renier, 1804) accepted as Lineus bilineatus (Renier, 1804) accepted as Siphonenteron bilineatum Meneghini in Renier, 1847 (unaccepted > superseded combination)
9. Species Meckelia borealis Diesing, 1862 accepted as Cerebratulus borealis (Diesing, 1862) (unaccepted > superseded combination)
10. Species Meckelia capensis Diesing, 1862 accepted as Meckelia macrorrhochma Schmarda, 1859 accepted as Cerebratulus macrorrhochmus (Schmarda, 1859) (Synonym)
11. Species Meckelia carmellina (Quatrefages, 1846) accepted as Borlasia carmellina Quatrefages, 1846 accepted as Baseodiscus delineatus (Delle Chiaje, 1822) (unaccepted > superseded combination)
12. Species Meckelia ceylanica Schmarda, 1859 accepted as Micrura ceylanica (Schmarda, 1859) (synonym)
13. Species Meckelia cingulata Stimpson, 1855 accepted as Lineus cingulatus (Stimpson, 1855) (synonym)
14. Species Meckelia depressa accepted as Cerebratulus depressus Quatrefages, 1846 (synonym)
15. Species Meckelia erythrorochma accepted as Cerebratulus erythrorochma Joubin, 1902 (synonym)
16. Species Meckelia fasciata accepted as Cerebratulus fasciatus Stimpson, 1857 accepted as Notospermus geniculatus (Delle Chiaje, 1822) (synonym)
17. Species Meckelia fasciatus accepted as Cerebratulus fasciatus Stimpson, 1857 accepted as Notospermus geniculatus (Delle Chiaje, 1822) (synonym)
18. Species Meckelia fragilis Girard, 1851 accepted as Micrura leidyi (Verrill, 1892) (synonym)
19. Species Meckelia fusca (Fabricius, 1780) accepted as Nemertes fusca (Fabricius, 1780) accepted as Lineus ruber (Müller, 1774) (synonym)
20. Species Meckelia ingens Leidy, 1855 accepted as Cerebratulus lacteus (Leidy, 1851) (synonym)
21. Species Meckelia knerii Diesing, 1850 accepted as Cerebratulus knerii (Diesing, 1850) accepted as Notospermus geniculatus (Delle Chiaje, 1822) (basionym)
22. Species Meckelia lactea Leidy, 1851 accepted as Cerebratulus lacteus (Leidy, 1851) (basionym)
23. Species Meckelia leuckarti Diesing, 1862 accepted as Cerebratulus annellatus (Leuckart, 1849) (synonym)
24. Species Meckelia ligurica accepted as Cerebratulus liguricus Blanchard, 1849 (synonym)
25. Species Meckelia lizziae Girard, 1853 accepted as Cerebratulus lacteus (Leidy, 1851) (synonym)
26. Species Meckelia lurida Verrill, 1873 accepted as Tarrhomyos luridus (Verrill, 1873) (synonym)
27. Species Meckelia macrorrhochma Schmarda, 1859 accepted as Cerebratulus macrorrhochmus (Schmarda, 1859) (basionym)
28. Species Meckelia nigra Stimpson, 1855 accepted as Cerebratulus nigrus (Stimpson, 1855) accepted as Dushia nigra (Stimpson, 1855) (New Combination)
29. Species Meckelia oerstedii (van Beneden, 1861) accepted as Lineus bilineatus (Renier, 1804) accepted as Siphonenteron bilineatum Meneghini in Renier, 1847 (unaccepted > superseded combination)
30. Species Meckelia piperata Stimpson, 1855 accepted as Iwatanemertes piperata (Stimpson, 1855) (New Combination)
31. Species Meckelia pocohontas Girard, 1853 accepted as Cerebratulus lacteus (Leidy, 1851) (synonym)
32. Species Meckelia rosea Leidy, 1851 accepted as Micrura leidyi (Verrill, 1892) (synonym)
33. Species Meckelia somatotomus Leuckart, 1828 accepted as Cerebratulus marginatus [Renier], [1804] (Synonym)
34. Species Meckelia striata Schmarda, 1859 accepted as Myorhynchonemertes striata (Schmarda, 1859) (synonym)
35. Species Meckelia taenia (Dalyell, 1853) accepted as Lineus bilineatus (Renier, 1804) accepted as Siphonenteron bilineatum Meneghini in Renier, 1847 (unaccepted > superseded combination)
36. Species Meckelia trigonocephala Schmarda, 1859 accepted as Micrura trigonocephala (Schmarda, 1859) (synonym)
37. Species Meckelia trilineata accepted as Tubulanus annulatus (Montagu, 1804) (synonym)
38. Species Meckelia urticans Müller, 1854 accepted as Cerebratulus urticans (Müller, 1854) (basionym)
39. Species Meckelia atra Girard, 1851 accepted as Dushia atra (Girard, 1851) sensu Girard, 1851 (uncertain > nomen dubium)

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