Diadematidae

The Diadematidae are a family of sea urchins. Their tests are either rigid or flexible and their spines are long and hollow. * Astropyga Gray, 1825 * Astropyga radiata (Leske, 1778), extant * Astropyga pulvinata (Lamarck, 1816), extant * Astropyga magnifica (Clark, 1934), extant * Centrostephanus Peters, 1855 * Centrostephanus asteriscus (Agassiz & Clark, 1907), extant * Centrostephanus coronatus (Verrill, 1867), extant * (Wiltshire in Wright, 1882), Santonian, Maastrichtian, Danian * Centrostephanus longispinus (Philippi, 1845), extant * Centrostephanus nitidus

Diadematidae

The Diadematidae are a family of sea urchins. Their tests are either rigid or flexible and their spines are long and hollow. * Astropyga Gray, 1825 * Astropyga radiata (Leske, 1778), extant * Astropyga pulvinata (Lamarck, 1816), extant * Astropyga magnifica (Clark, 1934), extant * Centrostephanus Peters, 1855 * Centrostephanus asteriscus (Agassiz & Clark, 1907), extant * Centrostephanus coronatus (Verrill, 1867), extant * (Wiltshire in Wright, 1882), Santonian, Maastrichtian, Danian * Centrostephanus longispinus (Philippi, 1845), extant * Centrostephanus nitidus