10.1130/2010148 S. Zamora S. Zamora Supplemental material: Middle Cambrian echinoderms from north Spain show echinoderms diversified earlier in Gondwana Geological Society of America 2010 Geoscience 2010-01-01 00:00:00 Journal contribution https://gsapubs.figshare.com/articles/journal_contribution/Supplemental_material_Middle_Cambrian_echinoderms_from_north_Spain_show_echinoderms_diversified_earlier_in_Gondwana/12340334 GSA Data Repository Item 2010148, Geology, Vol. 38, p. 507. File size: 2 p., about 259 KB.