Schizaster
Schizaster is a genus of heart urchins belonging to the family Schizasteridae. The type species of the genus is Schizaster studeri.
Species
Extant and extinct species within this genus include:Schizaster alcaldei Sánchez Roig, 1949 † Schizaster alsiensis Maccagno, 1947 † Schizaster altissimus Arnold & H. L. Clark, 1927 † Schizaster bathypetalus Arnold & H. L. Clark, 1927 † Schizaster beckeri Cooke, 1942 † Schizaster brachypetalus Arnold & H. L. Clark, 1927 † Schizaster caobaense Sánchez Roig, 1949 † Schizaster cojimarensis Sánchez Roig, 1949 † Schizaster compactus Schizaster costaricensis Durham, 1961 † Schizaster delorenzoi Checchia-Rispoli, 1950 † Schizaster doederleini Schizaster dumblei Israelsky, 1924 † Schizaster duroensis Kier, 1957 † Schizaster dyscritus Arnold & H. L. Clark, 1927 † Schizaster edwardsi Cotteau, 1889 -Schizaster eopneustes Lambert, 1933 † Schizaster excavatus Martin, in Jeannet & Martin, 1937 † Schizaster fernandezi Sánchez Roig, 1952 † Schizaster floridiensis Schizaster gerthi Pijpers, 1933 † Schizaster gibberulus L. Agassiz in L. Agassiz & Desor, 1847Schizaster gigas Sánchez Roig, 1953 † Schizaster granti Duncan & Sladen, 1883 † Schizaster guirensis Sánchez Roig, 1949 † Schizaster habanensis Sánchez Roig, 1949 † Schizaster hexagonalis Arnold & H. L. Clark, 1927 † Schizaster humei Lambert, 1932 † Schizaster hunti Kier, 1957 † Schizaster jeanneti Martin, in Jeannet & Martin, 1937 † Schizaster karkarensis Kier, 1957 † Schizaster kinasaensis Morishita, 1953 † Schizaster lacunosus Schizaster leprosorum Lambert, 1933 † Schizaster llagunoi Lambert & Sánchez Roig, in Sánchez Roig, 1949 † Schizaster marci Castex, 1930 † Schizaster miyazakiensis Morishita, 1956 † Schizaster morlini Grant & Hertlein, 1956 † Schizaster moronensis Sánchez Roig, 1951 † Schizaster munozi Sánchez Roig, 1949 † Schizaster narindensis Lambert, 1933 † Schizaster ocalanus Cooke, 1942 † Schizaster orbignyanus A. Agassiz, 1880 Schizaster ovatus Schizaster pappi Thirring, 1936 † Schizaster pentagonalis Sánchez Roig, 1953 † Schizaster persica Clegg, 1933 † Schizaster portisi Serra, 1932 † Schizaster pratti Israelsky, 1933 † Schizaster riveroi Sánchez Roig, 1952 † Schizaster rojasi Sánchez Roig, 1952 † Schizaster rotundatus Schizaster salutis Sánchez Roig, 1949 † Schizaster sanctamariae Sánchez Roig, 1949 † Schizaster santanae Sánchez Roig, 1949 † Schizaster schlosseri Traub, 1938 † Schizaster taiwanicus Hayasaka, 1948 † Schizaster vedadoensis Sánchez Roig, 1949 †The fossil record of the genus dates back to the Paleocene. These fossils have been found all over the world.