1. Subspecies Cassidaria echinophora coronata Settepassi, 1970 accepted as Galeodea echinophora (Linnaeus, 1758) (not available, published in a work which does not consistently use binominal nomenclature (ICZN art. 11.4))
2. Subspecies Cassidaria echinophora ingens Settepassi, 1970 accepted as Galeodea echinophora (Linnaeus, 1758) (not available, published in a work which does not consistently use binominal nomenclature (ICZN art. 11.4))
3. Variety Cassidaria echinophora var. adriatica Mascarini, 1884 accepted as Galeodea echinophora (Linnaeus, 1758)
4. Variety Cassidaria echinophora var. densetuberculata Settepassi, 1970 accepted as Galeodea echinophora (Linnaeus, 1758) (not available, published in a work which does not consistently use binominal nomenclature (ICZN art. 11.4))
5. Variety Cassidaria echinophora var. dentata Settepassi, 1970 accepted as Galeodea echinophora (Linnaeus, 1758) (not available, published in a work which does not consistently use binominal nomenclature (ICZN art. 11.4))
6. Variety Cassidaria echinophora var. dilatata Settepassi, 1970 accepted as Galeodea echinophora (Linnaeus, 1758) (not available, published in a work which does not consistently use binominal nomenclature (ICZN art. 11.4))
7. Variety Cassidaria echinophora var. dubia Cerulli-Irelli, 1911 accepted as Galeodea rugosa (Linnaeus, 1771) (synonym)
8. Variety Cassidaria echinophora var. globosa Bucquoy, Dautzenberg & Dollfus, 1882 accepted as Galeodea echinophora (Linnaeus, 1758)
9. Variety Cassidaria echinophora var. globosocordonata Settepassi, 1970 accepted as Galeodea echinophora (Linnaeus, 1758) (not available, published in a work which does not consistently use binominal nomenclature (ICZN art. 11.4))
10. Variety Cassidaria echinophora var. minima Settepassi, 1970 accepted as Galeodea echinophora (Linnaeus, 1758) (not available, published in a work which does not consistently use binominal nomenclature (ICZN art. 11.4))
11. Variety Cassidaria echinophora var. multituberculata Settepassi, 1970 accepted as Galeodea echinophora (Linnaeus, 1758) (not available, published in a work which does not consistently use binominal nomenclature (ICZN art. 11.4))
12. Variety Cassidaria echinophora var. mutica Tiberi, 1863 accepted as Galeodea echinophora (Linnaeus, 1758)
13. Variety Cassidaria echinophora var. obsoleta Bucquoy, Dautzenberg & Dollfus, 1882 accepted as Galeodea echinophora (Linnaeus, 1758)
14. Variety Cassidaria echinophora var. solida Bucquoy, Dautzenberg & Dollfus, 1882 accepted as Galeodea echinophora (Linnaeus, 1758)
15. Variety Cassidaria echinophora var. subdiadema Settepassi, 1970 accepted as Galeodea echinophora (Linnaeus, 1758) (not available, published in a work which does not consistently use binominal nomenclature (ICZN art. 11.4))
16. Variety Cassidaria echinophora var. subnodulosa Bucquoy, Dautzenberg & Dollfus, 1882 accepted as Galeodea echinophora (Linnaeus, 1758)

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