1. Subfamily Echinothuriinae Thomson, 1872
   1. Genus Araeosoma Mortensen, 1903
      1. Species Araeosoma alternatum Mortensen, 1934
      2. Species Araeosoma anatirostrum Anderson, 2013
      3. Species Araeosoma bakeri Anderson, 2013
      4. Species Araeosoma belli Mortensen, 1903
      5. Species Araeosoma bidentatum Anderson, 2013
      6. Species Araeosoma brunnichi Ravn, 1928 †
      7. Species Araeosoma coriaceum (A. Agassiz, 1879)
         1. Subspecies Araeosoma coriaceum coriaceum (A. Agassiz, 1879)
         2. Subspecies Araeosoma coriaceum indicum Koehler, 1921
         3. Variety Araeosoma coriaceum var. indicum Koehler, 1927 accepted as Araeosoma coriaceum indicum Koehler, 1921 (Infrasubspecific taxon that is to be treated as a subspecies according to ICZN 4th Ed. Article 45.6.4)
      8. Species Araeosoma eurypatum A. Agassiz & H.L. Clark, 1909
      9. Species Araeosoma fenestratum (Thomson, 1872)
      10. Species Araeosoma leppienae Anderson, 2013
      11. Species Araeosoma leptaleum A. Agassiz & H.L. Clark, 1909
      12. Species Araeosoma migratum Anderson, 2013
      13. Species Araeosoma mortenseni Ravn, 1928 †
      14. Species Araeosoma owstoni Mortensen, 1904
          1. Subspecies Araeosoma owstoni bicolor (A. Agassiz & H.L. Clark, 1907)
          2. Subspecies Araeosoma owstoni nudum Mortensen, 1934
          3. Subspecies Araeosoma owstoni owstoni Mortensen, 1904
          4. Variety Araeosoma owstoni var. nudum Mortensen, 1934 accepted as Araeosoma owstoni nudum Mortensen, 1934 (Infrasubspecific taxon that is to be treated as a subspecies according to ICZN 4th Ed. Article 45.6.4)
      15. Species Araeosoma parviungulatum Mortensen, 1934
      16. Species Araeosoma paucispinum H.L. Clark, 1925
      17. Species Araeosoma splendens Mortensen, 1934
      18. Species Araeosoma tertii Anderson, 2013
      19. Species Araeosoma tessellatum (A. Agassiz, 1879)
          1. Subspecies Araeosoma tessellatum carinatum Mortensen, 1934
          2. Subspecies Araeosoma tessellatum tessellatum (A. Agassiz, 1879)
          3. Variety Araeosoma tessellatum var. carinatum Mortensen, 1934 accepted as Araeosoma tessellatum carinatum Mortensen, 1934 (Infrasubspecific taxon that is to be treated as a subspecies according to ICZN 4th Ed. Article 45.6.4)
      20. Species Araeosoma thetidis (H.L. Clark, 1909)
      21. Species Araeosoma violaceum Mortensen, 1903
      22. Species Araeosoma coriacea (A. Agassiz, 1879) accepted as Araeosoma coriaceum (A. Agassiz, 1879) (incorrect declination of species name)
      23. Species Araeosoma gracile (A. Agassiz, 1881) accepted as Calveriosoma gracile (A. Agassiz, 1881) (transferred to Calveriosoma)
      24. Species Araeosoma hystrix (Thomson, 1872) accepted as Calveriosoma hystrix (Thomson, 1872) (transferred to Calveriosoma)
      25. Species Araeosoma owsteni Mortensen, 1904 accepted as Araeosoma owstoni Mortensen, 1904 (incorrect original spelling (mandatory changed according to ICZN 4th Ed. Article 32.5.1.1. - corrected in erratum))
      26. Species Araeosoma pellucidum (A. Agassiz, 1879) accepted as Hapalosoma pellucidum (A. Agassiz, 1879) (transferred to Hapalosoma)
      27. Species Araeosoma pyrochloa (A. Agassiz & H.L. Clark, 1907) accepted as Calveriosoma gracile (A. Agassiz, 1881) (subjective junior synonym)
      28. Species Araeosoma tesselatum accepted as Araeosoma tessellatum (A. Agassiz, 1879) (misspelling)
   2. Genus Asthenosoma Grube, 1868
      1. Species Asthenosoma dilatatum Mortensen, 1934
      2. Species Asthenosoma ijimai Yoshiwara, 1897
      3. Species Asthenosoma intermedium H.L. Clark, 1938
      4. Species Asthenosoma marisrubri Weinberg & de Ridder, 1998
      5. Species Asthenosoma periculosum Endean, 1964
      6. Species Asthenosoma striatissimum Ravn, 1928 †
      7. Species Asthenosoma varium Grube, 1868
         1. Subspecies Asthenosoma varium album Mortensen, 1934
         2. Subspecies Asthenosoma varium varium Grube, 1868
      8. Species Asthenosoma belli (Mortensen, 1903) accepted as Araeosoma belli Mortensen, 1903 (unaccepted combination)
      9. Species Asthenosoma bicolor A. Agassiz & H.L. Clark, 1907 accepted as Araeosoma owstoni bicolor (A. Agassiz & H.L. Clark, 1907) (accepted at subspecies rank)
      10. Species Asthenosoma coriacea A. Agassiz, 1879 accepted as Araeosoma coriaceum (A. Agassiz, 1879) (transferred to Araesoma)
      11. Species Asthenosoma coriaceum A. Agassiz, 1879 accepted as Araeosoma coriaceum (A. Agassiz, 1879) (transferred to Araesoma)
      12. Species Asthenosoma gracile A. Agassiz, 1881 accepted as Calveriosoma gracile (A. Agassiz, 1881) (transferred to Calveriosoma)
      13. Species Asthenosoma grubei A. Agassiz, 1879 accepted as Asthenosoma varium Grube, 1868 (subjective junior synonym)
      14. Species Asthenosoma heteractis Bedford, 1900 accepted as Asthenosoma varium Grube, 1868 (subjective junior synonym)
      15. Species Asthenosoma hystrix (Thomson, 1872) accepted as Calveriosoma hystrix (Thomson, 1872) (transferred to Calveriosoma)
      16. Species Asthenosoma marisrubis accepted as Asthenosoma marisrubri Weinberg & de Ridder, 1998 (misspelling)
      17. Species Asthenosoma owstoni (Mortensen, 1904) accepted as Araeosoma owstoni Mortensen, 1904 (unaccepted combination)
      18. Species Asthenosoma pellucidum A. Agassiz, 1879 accepted as Hapalosoma pellucidum (A. Agassiz, 1879) (transferred to Hapalosoma)
      19. Species Asthenosoma pyrochloa A. Agassiz & H.L. Clark, 1907 accepted as Calveriosoma gracile (A. Agassiz, 1881) (subjective junior synonym)
      20. Species Asthenosoma reynoldsi A. Agassiz, 1880 accepted as Araeosoma fenestratum (Thomson, 1872) (subjective junior synonym)
      21. Species Asthenosoma reynoldsii accepted as Asthenosoma reynoldsi A. Agassiz, 1880 (misspelling)
      22. Species Asthenosoma tessellata A. Agassiz, 1879 accepted as Araeosoma tessellatum (A. Agassiz, 1879) (transferred to Araesoma)
      23. Species Asthenosoma tessellatum A. Agassiz, 1879 accepted as Araeosoma tessellatum (A. Agassiz, 1879) (transferred to Araesoma)
      24. Species Asthenosoma thetidis H.L. Clark, 1909 accepted as Araeosoma thetidis (H.L. Clark, 1909) (transferred to Araesoma)
      25. Species Asthenosoma urens (Sarens, 1886) accepted as Asthenosoma varium Grube, 1868 (subjective junior synonym)
   3. Genus Calveriosoma Mortensen, 1934
      1. Species Calveriosoma gracile (A. Agassiz, 1881)
      2. Species Calveriosoma hystrix (Thomson, 1872)
      3. Species Calveriosoma fenestratum (Thomson, 1872) accepted as Araeosoma fenestratum (Thomson, 1872) (tranferred to Araeosoma)
   4. Genus Echinothuria Woodward, 1863 †
   5. Genus Hapalosoma Mortensen, 1903
      1. Species Hapalosoma amynina Anderson, 2013
      2. Species Hapalosoma gemmiferum Mortensen, 1934
      3. Species Hapalosoma pellucidum (A. Agassiz, 1879)
      4. Species Hapalosoma pulchrum Rowe, 1989
   6. Genus Calveria Thomson, 1872 accepted as Calveriosoma Mortensen, 1934 (preoccupied (non Carpenter et al. 1869))
      1. Species Calveria fenestrata Thomson, 1872 accepted as Araeosoma fenestratum (Thomson, 1872) (transferred to Araesoma)
      2. Species Calveria fenestratum Thomson, 1872 accepted as Araeosoma fenestratum (Thomson, 1872) (transferred to Araesoma)
      3. Species Calveria gracilis (A. Agassiz, 1881) accepted as Calveriosoma gracile (A. Agassiz, 1881) (unjustified emendation)
      4. Species Calveria hystrix Thomson, 1872 accepted as Calveriosoma hystrix (Thomson, 1872) (transferred to Calveriosoma)
   7. Genus Cyanosoma Sarasin & Sarasin, 1886 accepted as Asthenosoma Grube, 1868 (subjective junior synonym)
      1. Species Cyanosoma urens Sarasin, 1886 accepted as Asthenosoma varium Grube, 1868 (subjective junior synonym)
2. Subfamily Hygrosomatinae Smith & Wright, 1990
   1. Genus Hygrosoma Mortensen, 1903
      1. Species Hygrosoma hoplacantha (Thomson, 1877)
      2. Species Hygrosoma luculentum (A. Agassiz, 1879)
      3. Species Hygrosoma petersii (A. Agassiz, 1880)
      4. Species Hygrosoma aethiopicum Döderlein, 1905 accepted as Hygrosoma hoplacantha (Thomson, 1877) (subjective junior synonym)
      5. Species Hygrosoma hoplacanthum (Thomson, 1877) accepted as Hygrosoma hoplacantha (Thomson, 1877) (incorrect declination of species name)
      6. Species Hygrosoma lucentulum (A. Agassiz, 1879) accepted as Hygrosoma luculentum (A. Agassiz, 1879) (misspelling)
      7. Species Hygrosoma petersi (A. Agassiz, 1880) accepted as Hygrosoma petersii (A. Agassiz, 1880) (Spelling variation)
      8. Species Hygrosoma uranus (Thomson, 1877) accepted as Tromikosoma uranus (Thomson, 1877) (transferred to Tromikosoma)
3. Genus Retzneiosoma Kroh, 2005 †
   1. Species Retzneiosoma jaseneki Kroh, 2005 †
4. Subfamily Sperosomatinae Smith & Wright, 1990
   1. Genus Sperosoma Koehler, 1897
      1. Species Sperosoma antillense Mortensen, 1934
      2. Species Sperosoma armatum Koehler, 1927
      3. Species Sperosoma biseriatum Döderlein, 1901
      4. Species Sperosoma crassispinum Mortensen, 1934
      5. Species Sperosoma durum Döderlein, 1905
      6. Species Sperosoma giganteum A. Agassiz & H.L. Clark, 1907
      7. Species Sperosoma grimaldii Koehler, 1897
      8. Species Sperosoma nudum Shigei, 1977
      9. Species Sperosoma obscurum A. Agassiz & H.L. Clark, 1907
      10. Species Sperosoma quincunciale de Meijere, 1904
      11. Species Sperosoma tristichum Mortensen, 1934
   2. Genus Tromikosoma Mortensen, 1903
      1. Species Tromikosoma australe (Koehler, 1922)
      2. Species Tromikosoma hispidum (A. Agassiz, 1898)
      3. Species Tromikosoma koehleri Mortensen, 1903
      4. Species Tromikosoma panamense (A. Agassiz, 1898)
      5. Species Tromikosoma rugosum Anderson, 2016
      6. Species Tromikosoma tenue (A. Agassiz, 1879)
      7. Species Tromikosoma uranus (Thomson, 1877)
      8. Species Tromikosoma mordens de Meijere, 1904 accepted as Tromikosoma tenue (A. Agassiz, 1879) (subjective junior synonym)
   3. Genus Echinosoma Pomel, 1883 accepted as Tromikosoma Mortensen, 1903 (preoccupied (non Audinet-Serville, 1839))
      1. Species Echinosoma australe Koehler, 1926 accepted as Tromikosoma australe (Koehler, 1922) (transferred to Tromikosoma)
      2. Species Echinosoma hispidum (A. Agassiz, 1898) accepted as Tromikosoma hispidum (A. Agassiz, 1898) (transferred to Tromikosoma)
      3. Species Echinosoma koehleri (Mortensen, 1903) accepted as Tromikosoma koehleri Mortensen, 1903 (unaccepted combination)
      4. Species Echinosoma luculentum (A. Agassiz, 1879) accepted as Hygrosoma luculentum (A. Agassiz, 1879) (transferred to Hygrosoma)
      5. Species Echinosoma panamense (A. Agassiz, 1898) accepted as Tromikosoma panamense (A. Agassiz, 1898) (transferred to Tromikosoma)
      6. Species Echinosoma petersii (A. Agassiz, 1880) accepted as Hygrosoma petersii (A. Agassiz, 1880) (transferred to Hygrosoma)
      7. Species Echinosoma tenue (A. Agassiz, 1879) accepted as Tromikosoma tenue (A. Agassiz, 1879) (transferred to Tromikosoma)
      8. Species Echinosoma tenuis (A. Agassiz, 1879) accepted as Tromikosoma tenue (A. Agassiz, 1879) (incorrect original spelling (mandatory changed according to ICZN 4th Ed. Article 31.2.))
      9. Species Echinosoma uranus (Thomson, 1877) accepted as Tromikosoma uranus (Thomson, 1877) (transferred to Tromikosoma)
      10. Species Echinosoma zealandiae (Agassiz, 1904) accepted as Phormosoma rigidum A. Agassiz, 1881 (subjective junior synonym)

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