In synonymy:
Atelacantha Simon, 1864 = Gasteracantha Sundevall, 1833 (Simon, 1895a: 845)
Bunocrania Thorell, 1878 = Gasteracantha Sundevall, 1833 (Levi, 1996b: 140)
Isacantha Simon, 1864 = Gasteracantha Sundevall, 1833 (Simon, 1895a: 845)
Paurotylus Tullgren, 1910 = Gasteracantha Sundevall, 1833 (Emerit, 1982c: 458)
Plectana Walckenaer, 1841 = Gasteracantha Sundevall, 1833 (McCook, 1894: 211, by transfer of the type species)
Stanneoclavis Butler, 1873 = Gasteracantha Sundevall, 1833 (Simon, 1895a: 845)
Transferred to other genera:
Gasteracantha acrosomoides O. Pickard-Cambridge, 1879 -- see Acrosomoides
Gasteracantha arcuata (Fabricius, 1793) -- see Macracantha
Gasteracantha astrigera L. Koch, 1871 -- see Austracantha
Gasteracantha batesi Pocock, 1899 -- see Afracantha
Gasteracantha brevispina (Doleschall, 1857) -- see Thelacantha
Gasteracantha camerunensis Thorell, 1899 -- see Afracantha
Gasteracantha cicatricosa C. L. Koch, 1844 -- see Isoxya
Gasteracantha cowani Butler, 1882 -- see Isoxya
Gasteracantha crucimaculata Dahl, 1914 -- see Hypsacantha
Gasteracantha cuspidata C. L. Koch, 1837 -- see Thelacantha
Gasteracantha falkensteini (Karsch, 1879) -- see Aetrocantha
Gasteracantha formosana Saito, 1933 -- see Thelacantha
Gasteracantha galeata (Simon, 1887) -- see Aetrocantha
Gasteracantha globulata (Walckenaer, 1841) -- see Actinacantha
Gasteracantha glyphica Guérin, 1839 -- see Augusta
Gasteracantha hasselti (C. L. Koch, 1837) -- see Macracantha
Gasteracantha linnaei (Walckenaer, 1841) -- see Acrosomoides
Gasteracantha minax Thorell, 1859 -- see Austracantha
Gasteracantha mucronota (Walckenaer, 1841) -- see Isoxya
Gasteracantha nigromutica Caporiacco, 1939 -- see Isoxya
Gasteracantha nordviei Strand, 1913 -- see Togacantha
Gasteracantha nossibeana Strand, 1915 -- see Madacantha
Gasteracantha penizoides (Simon, 1887) -- see Isoxya
Gasteracantha reuteri Lenz, 1886 -- see Isoxya
Gasteracantha sagaensis Bösenberg & Strand, 1906 -- see Phoroncidia
Gasteracantha sola Saito, 1933 -- see Thelacantha
Gasteracantha somalica Caporiacco, 1940 -- see Isoxya
Gasteracantha sparsa Saito, 1933 -- see Thelacantha
Gasteracantha stuhlmanni Bösenberg & Lenz, 1895 -- see Isoxya
Gasteracantha tabulata Thorell, 1859 -- see Isoxya
Gasteracantha testudinaria Simon, 1901 -- see Isoxya
Gasteracantha testudinaria benina Strand, 1913 -- see Isoxya
Gasteracantha tetraedra (Walckenaer, 1841) -- see Acrosomoides
Gasteracantha tuberifera Dahl, 1914 -- see Isoxya
In synonymy:
Gasteracantha cancriformis unicolor Taczanowski, 1879 = Gasteracantha cancriformis Linnaeus, 1758 (Levi, 1978a: 438)
Gasteracantha columbiae Giebel, 1863 = Gasteracantha cancriformis Linnaeus, 1758 (Dahl, 1914: 263)
Gasteracantha comstocki Mello-Leitão, 1917 = Gasteracantha cancriformis Linnaeus, 1758 (Levi, 1996b: 142)
Gasteracantha crucigera melanotica Kulczyński, 1911 = Gasteracantha crucigera Bradley, 1877 (Chrysanthus, 1971: 44)
Gasteracantha crucigera tenuiscapus Kulczyński, 1911 = Gasteracantha crucigera Bradley, 1877 (Chrysanthus, 1971: 44)
Gasteracantha depressa (Tullgren, 1910) = Gasteracantha milvoides Butler, 1873 (Emerit, 1982c: 458)
Gasteracantha importuna O. Pickard-Cambridge, 1879 = Gasteracantha sanguinolenta C. L. Koch, 1844 (Benoit, 1962a: 64)
Gasteracantha impotens Gerstaecker, 1873 (removed from S of G. versicolor) = Gasteracantha sanguinolenta C. L. Koch, 1844 (Benoit, 1962a: 64)
Gasteracantha insulana Thorell, 1859 (removed from S of G. servillei) = Gasteracantha cancriformis Linnaeus, 1758 (Levi, 1978a: 437)
Gasteracantha kochi Butler, 1873 (removed from S of G. servillei) = Gasteracantha cancriformis Linnaeus, 1758 (Levi, 1978a: 438)
Gasteracantha macrura Pocock, 1898 (removed from S of G. sanguinolenta) = Gasteracantha milvoides Butler, 1873 (Benoit, 1962a: 59)
Gasteracantha malayensis (Simon, 1864) = Gasteracantha mengei Keyserling, 1864 (Dahl, 1914: 270)
Gasteracantha mammosa C. L. Koch, 1844 = Gasteracantha cancriformis Linnaeus, 1758 (Benoit, 1964a: 49)
Gasteracantha mascula Strand, 1915 = Gasteracantha cancriformis Linnaeus, 1758 (Levi, 1996b: 142)
Gasteracantha nabona Chamberlin, 1924 = Gasteracantha kuhli C. L. Koch, 1837 (Fox, 1938b: 365)
Gasteracantha nigripes Simon, 1881 = Gasteracantha rhomboidea madagascariensis Vinson, 1863 (Benoit, 1964a: 50)
Gasteracantha occidentalis Dahl, 1914 = Gasteracantha sanguinolenta C. L. Koch, 1844 (Benoit, 1962a: 64)
Gasteracantha pentagona anirica Strand, 1915 = Gasteracantha pentagona Walckenaer, 1841 (Nentwig et al., 2019: 37)
Gasteracantha scintillans concolor Rainbow, 1913 = Gasteracantha scintillans Butler, 1873 (Chrysanthus, 1971: 45)
Gasteracantha sepulchralis Simon, 1881 = Gasteracantha rhomboidea madagascariensis Vinson, 1863 (Benoit, 1964a: 50)
Gasteracantha servillei (Guérin, 1825) = Gasteracantha cancriformis Linnaeus, 1758 (Levi, 1996b: 140)
Gasteracantha servillei joinvillensis Strand, 1915 = Gasteracantha cancriformis Linnaeus, 1758 (Levi, 1996b: 142)
Gasteracantha sodalis O. Pickard-Cambridge, 1898 = Gasteracantha sanguinolenta C. L. Koch, 1844 (Benoit, 1964a: 50)
Gasteracantha taeniata bawensis Strand, 1915 = Gasteracantha taeniata Walckenaer, 1841 (Nentwig et al., 2019: 37)
Gasteracantha taeniata jamurensis Strand, 1915 = Gasteracantha taeniata Walckenaer, 1841 (Nentwig et al., 2019: 37)
Gasteracantha taeniata maculella Strand, 1911 = Gasteracantha taeniata Walckenaer, 1841 (Nentwig et al., 2019: 37)
Gasteracantha taeniata obsoletopicta Strand, 1915 = Gasteracantha taeniata Walckenaer, 1841 (Nentwig et al., 2019: 37)
Gasteracantha taeniata oinokensis Strand, 1915 = Gasteracantha taeniata Walckenaer, 1841 (Nentwig et al., 2019: 37)
Gasteracantha taeniata sentanensis Strand, 1915 = Gasteracantha taeniata Walckenaer, 1841 (Nentwig et al., 2019: 37)
Gasteracantha taeniata trivittinota Strand, 1911 = Gasteracantha taeniata Walckenaer, 1841 (Nentwig et al., 2019: 36)
Gasteracantha taeniata univittinota Strand, 1911 = Gasteracantha taeniata Walckenaer, 1841 (Nentwig et al., 2019: 36)
Gasteracantha tetracantha (Linnaeus, 1767) = Gasteracantha cancriformis Linnaeus, 1758 (Levi, 1996b: 140)
Gasteracantha theisi antemaculata Strand, 1911 = Gasteracantha theisi Guérin, 1838 (Nentwig et al., 2019: 36)
Gasteracantha theisi keyana Strand, 1911 = Gasteracantha theisi Guérin, 1838 (Nentwig et al., 2019: 36)
Gasteracantha theisi quadrisignatella Strand, 1911 = Gasteracantha theisi Guérin, 1838 (Nentwig et al., 2019: 37)
Gasteracantha versicolor nigristerna Caporiacco, 1941 = Gasteracantha versicolor Walckenaer, 1841 (Benoit, 1962a: 61)
Nomina dubia:
Gasteracantha sanguinolenta rueppelli Strand, 1916: 64 (j, Egypt) -- Nentwig et al., 2019: 36
Gasteracantha trigona Giebel, 1863: 311 (f, Indonesia/Java) -- Roewer, 1955c: 1514
Nomina nuda:
Gasteracantha cancriformis alba Franganillo, 1936c: 96 (Cuba) [urn:lsid:nmbe.ch:spidersp:054318] , Franganillo, 1936c: 96 (no description)
Gasteracantha cancriformis aurata Franganillo, 1926a: 57 (Cuba) [urn:lsid:nmbe.ch:spidersp:054319] , Franganillo, 1926a: 57 (no description)
Gasteracantha cancriformis nigra Franganillo, 1926a: 57 (Cuba) [urn:lsid:nmbe.ch:spidersp:054320] , Franganillo, 1926a: 57 (no description)
Gasteracantha mindanaoensis Alviola, Mohagan & Janicki, 2021: 12, f. 1b-c, 2c-d (f, Philipines) [urn:lsid:nmbe.ch:spidersp:054309] -- Alviola, Mohagan & Janicki, 2021, description is invalid as no type is fixed and no deposition of the types is stated, see ICZN Article 16.4