Species Echinus nortoni A. Bell & R. Bell, 1872 †(unaccepted > nomen nudum, unavailable since proposed without description, illustration, or indication (ICZN 1999 Article 12.1.))
Species Echinus versicolor L. Agassiz, 1841(unaccepted > nomen nudum, unavailable; mentioned in a list only; without description, illustration, or indication (ICZN 1999 Article 12.1.))
Species Echinus neglectus Lamarck, 1816(uncertain > nomen dubium, possible subjective junior synonym of Strongylocentrotus droebachiensis or S. pallidus)
Kroh, A.; Mooi, R. (2025). World Echinoidea Database. Echinidae Gray, 1825. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=123160 on 2025-07-09
basis of recordHansson, H.G. (2001). Echinodermata, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i>. 50: pp. 336-351. (look up in IMIS) [details]