Echinarachnius is a genus of sand dollars, belonging to the family Echinarachniidae.Kroh, A.; Mooi, R. (2020). World Echinoidea Database. Echinarachnius Gray, 1825. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=158061 on 2020-12-31
Species of Echinarachnius have been around since the Pliocene epoch.
Species †Echinarachnius alaskensis Durham, 1957 Echinarachnius asiaticus Michelin, 1859 †Echinarachnius humilis Nisiyama, 1968 †Echinarachnius kewi Grant & Eaton in Eaton, Grant & Allen, 1941 †Echinarachnius naganoensis Morishita, 1953 Echinarachnius parma (Lamarck, 1816) †Echinarachnius rumoensis Hayasaka & Shibata, 1952 †Echinarachnius subtumidus Nisiyama & Hashimoto, 1950
References
External links J.E. (1825). An attempt to divide the Echinida, or Sea Eggs, into natural families. Annals of Philosophy, new series. 10:423-431 Pomel, A. 1883. Classification méthodique et Genera des Échinides vivantes et fossiles. Thèses présentées à la Faculté des Sciences de Paris pour obtenir le Grade de Docteur ès Sciences Naturelles 503, Adolphe Jourdan, Alger, 131 pp Neave, Sheffield Airey. (1939-1996). Nomenclator Zoologicus vol. 1-10 Online. [developed by uBio, hosted online at MBLWHOI Library .