rosaceus. Mortensen (1948) and all subsequent workers have left the many species in the single 'umbrella' genus Clypeaster while acknowledging that there is considerable heterogeneity amongst species.
Clypeaster cf. profundus d'Archiac and Haime 1853, variety Y Stockley, 1927; NHM E17890. Chake Chake Beds, Pemba series, Lower Miocene. Kichwani Quarry, Pemba Island ...