1. Subgenus Astacus (Potamobius) Samoeulle, 1819 † accepted as Potamobius Samouelle, 1819 accepted as Astacus Fabricius, 1775 (unaccepted > superseded rank)
   1. Species Astacus (Potamobius) antiquus Harbort, 1905 † accepted as Protastacus antiquus (Harbort, 1905) † (unaccepted > superseded combination)
2. Species Astacus albescens Pennant, 1812 accepted as Palaemon longirostris H. Milne Edwards, 1837 (unaccepted > junior subjective synonym)
3. Species Astacus bamffius Pennant, 1777 accepted as Munida rugosa (Fabricius, 1775) (unaccepted > junior subjective synonym)
4. Species Astacus Birdii Bean, 1839 † accepted as Eryma birdi Woods, 1930 † (unaccepted > nomen nudum)
5. Species Astacus carinatus Meuschen, 1778 (unaccepted > unavailable name, published in work rejected for nomenclatural purposes, Opinion 261)
6. Species Astacus coerulescens Fabricius, 1775 accepted as Hippolyte coerulescens (Fabricius, 1775) (unaccepted > superseded combination)
7. Species Astacus crassicornis Fabricius, 1775 accepted as Scina crassicornis (Fabricius, 1775) (unaccepted > superseded combination)
8. Species Astacus elephas Fabricius, 1787 accepted as Palinurus elephas (Fabricius, 1787) (unaccepted > superseded combination)
9. Species Astacus europeus Couch, 1837 accepted as Homarus gammarus (Linnaeus, 1758) (unaccepted > junior subjective synonym)
10. Species Astacus fulvus Fabricius, 1793 accepted as Homarus capensis (Herbst, 1792) accepted as Homarinus capensis (Herbst, 1792) (unaccepted > junior subjective synonym)
11. Species Astacus groenlandicus Fabricius, 1775 accepted as Lebbeus groenlandicus (Fabricius, 1775) (unaccepted > superseded combination)
12. Species Astacus harengum Fabricius, 1781 accepted as Praunus flexuosus (Müller, 1776) (unaccepted > junior subjective synonym)
13. Species Astacus histrio Fabricius, 1775 accepted as Spirontocaris liljeborgii (Danielssen, 1859) (unaccepted > junior subjective synonym)
14. Species Astacus homari Fabricius, 1779 accepted as Gammarellus homari (J.C. Fabricius, 1779) (unaccepted > superseded combination)
15. Species Astacus Leachii Mantell, 1822 † accepted as Enoploclytia leachii (Mantell, 1822) † (unaccepted > superseded combination)
16. Species Astacus leptodactylus Germar, 1827 † accepted as Eryma modestiforme (von Schlotheim, 1822) † (unaccepted > junior subjective synonym)
17. Species Astacus leucoderma Pusch, 1838 † accepted as Eryma leucodermum (Pusch, 1838) † (unaccepted > superseded combination)
18. Species Astacus locusta Fabricius, 1781 accepted as Leander tenuicornis (Say, 1818) (unaccepted > junior subjective synonym)
19. Species Astacus longimanus Sowerby, 1826 † accepted as Hoploparia longimana (Sowerby, 1826) † (unaccepted > superseded combination)
20. Species Astacus maculatus Leach, 1814 accepted as Pandalus montagui Leach, 1814 (unaccepted > nomen nudum)
21. Species Astacus malabaricus Fabricius, 1775 accepted as Alpheus malabaricus (Fabricius, 1775) (unaccepted > superseded combination)
22. Species Astacus marinus Say, 1817 accepted as Homarus americanus H. Milne Edwards, 1837 (unaccepted > junior subjective synonym)
23. Species Astacus marinus Fabricius, 1775 accepted as Homarus gammarus (Linnaeus, 1758) (unaccepted > junior subjective synonym)
24. Species Astacus mucronatus Phillips, 1835 † accepted as Pseudastacus mucronatus (Phillips, 1835) † (unaccepted > superseded combination)
25. Species Astacus muricatus Olivier, 1791 accepted as Stenopus hispidus (Olivier, 1811)
26. Species Astacus narual Fabricius, 1787 accepted as Plesionika narval (Fabricius, 1787) (unaccepted > superseded combination, original spelling; subsequent emendation narval in common use)
27. Species Astacus nasoscopus Meuschen, 1778 accepted as Atya innocous (Herbst, 1792) (unaccepted > unavailable name, published in work rejected for nomenclatural purposes, Opinion 261)
28. Species Astacus ornatus Phillips, 1829 † accepted as Meyeria ornata (Phillips, 1829) † (unaccepted > superseded combination)
29. Species Astacus penicillatus Olivier, 1791 accepted as Panulirus penicillatus (Olivier, 1791) (unaccepted > superseded combination)
30. Species Astacus politus Schlüter in von der Marck & Schlüter, 1868 † accepted as Protastacus politus (Schlüter in von der Marck & Schlüter, 1868) † (unaccepted > superseded combination)
31. Species Astacus pusillus Petagna, 1792 accepted as Upogebia pusilla (Petagna, 1792) (unaccepted > superseded combination)
32. Species Astacus rostratus Phillips, 1829 † accepted as Paraglyphea rostrata (Phillips, 1829) † (unaccepted > superseded combination)
33. Species Astacus rugosus Rafinesque, 1814 accepted as Nephrops norvegicus (Linnaeus, 1758) (unaccepted > junior subjective synonym)
34. Species Astacus scaber Fabricius, 1798 accepted as Eutrichocheles modestus (Herbst, 1796) (unaccepted > junior subjective synonym)
35. Species Astacus serratus Pennant, 1777 accepted as Palaemon serratus (Pennant, 1777) (unaccepted > superseded combination)
36. Species Astacus spinimanus Germar, 1827 † accepted as Cycleryon propinquus (von Schlotheim, 1822) † (unaccepted > junior subjective synonym)
37. Species Astacus squilla (Linnaeus, 1758) accepted as Palaemon adspersus Rathke, 1836
38. Species Astacus strigosus (Linnaeus, 1761) accepted as Galathea strigosa (Linnaeus, 1761) (unaccepted > superseded combination)
39. Species Astacus Sussexiensis Mantell, 1833 † accepted as Palaeastacus sussexiensis (Mantell, 1833) † (unaccepted > superseded combination)
40. Species Astacus tyrrhenus Petagna, 1792 accepted as Gilvossius tyrrhenus (Petagna, 1792) (unaccepted > superseded combination)
41. Species Astacus zaleucus Thomson, 1873 accepted as Thaumastocheles zaleucus (Thomson, 1873) (unaccepted > superseded combination)
42. Species Astacus cenomanensis Fritsch in Fritsch & Kafka, 1887 † (uncertain > nomen dubium)
43. Species Astacus cylindrus Fabricius, 1793 (uncertain > nomen dubium, larval stage with no known adult link)
44. Species Astacus ferratus Fabricius, 1793 (uncertain > nomen dubium)
45. Species Astacus fulgens Fabricius, 1775 (uncertain > taxon inquirendum)
46. Species Astacus gibbosus Pennant, 1812 (uncertain > nomen dubium)
47. Species Astacus laevissimus Fritsch in Fritsch & Kafka, 1887 † (uncertain > nomen dubium)
48. Species Astacus planatus Fabricius, 1798 (uncertain > nomen dubium, larval stage with no known adult link)
49. Species Astacus tettigonus Fabricius, 1775 (uncertain > taxon inquirendum)

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