The Echinoid Directory
Loriolella ludovicii (Meneghini, 1867). A. marginatus Zone, Upper Pleinsbachian, Lower Jurassic, Clivio, Varese Province, Lombardy, Italy. Plating diagram of apical surface, from Smith, A. B. & Anzalone, L. 2000. Loriolella, a key taxon for understanding the early evolution of irregular echinoids. Palaeontology 43, 303-324.