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VM244: Diagnostic Methods for the Comprehensive Health Assessment of the Long-Spined Sea Urchin, Diadema antillarum

Figure G5. Aristotle’s lantern. (a) Oral area showing the gill, modified tube foot, and peristomial membrane. (b) Longitudinal view of the Aristotle’s lantern, mouth rim, and teeth. (c) Oral area showing the peristomial membrane, mouth rim, teeth, and modified tube feet. (d) Close up view of the peristomial membrane, oral mouth rim, and teeth. (e) Retractor muscle tissue. (f) Protractor muscle tissue. Arrows = gill; MR = mouth rim; mTF = modified tube feet ( = buccal podium); PM = protractor muscle; PMb = peristomial membrane; RM = retractor muscle; Th = teeth.

Credit: Yasunari Kiryu, FWC/FWRI