FIGURE 7 in A new species of Diadema (Echinodermata: Echinoidea: Diadematidae) from the eastern Atlantic Ocean and a neotype designation of Diadema antillarum (Philippi, 1845)

FIGURE 7. NHMTFMCBMEQ/00233, paratype of Diadema africanum. Apical system and pattern of iridophores: A, genital plate, gonopore and an ambulacrum; B, close-up of the apical system (paratype), C & D, pattern of iridophores around the apical system on a living specimen in daylight; E, pattern of iridophores at night; F, pattern of iridophore on a living specimen in daylight.